CN104892331B - Biodegradable organic polymeric nitrogen fertilizer and preparation method therefor - Google Patents
Biodegradable organic polymeric nitrogen fertilizer and preparation method therefor Download PDFInfo
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Abstract
The invention relates to the field of slow and controlled release of fertilizers, and specifically is a biodegradable organic polymeric nitrogen fertilizer and a preparation method therefor. Compared with existing fertilizer capable of slow and controlled release, the nitrogen fertilizer of the invention has the following advantages: (1) nutrient elements of carbon, hydrogen, oxygen and nitrogen of molecules of the nitrogen fertilizer of the invention are firmly connected to a same polymer chain by chemical bonds, thereby providing the nitrogen fertilizer with excellent properties of slow and controlled release. Total nitrogen release in water and soil shows an obvious rising trend within 1 to 20 days, and nutrient release is relatively slower within 20 to 90 days, thus greatly improving the utilization rate of the nitrogen fertilizer. and (2)After being applied in the soil, the biodegradable organic polymeric nitrogen fertilizer of the invention, under the effect of soil microbes and the water, gradually degrades into small-molecule nutrients for absorption and utilization by plants, so that the amount of nutrient elements of nitrogen fixed in the soil is reduced, and non-absorbable harmful substances are not left in the soil. The Biodegradable organic polymeric nitrogen fertilizer is a fertilizer that meets the green environmental protection requirements.
Description
Technical field
The present invention relates to sustained and controlled release chemical fertilizer field, specially a kind of biodegradable organic polymer nitrogenous fertilizer and its preparation side
Method.
Background technology
Nitrogen is a kind of nutrient with special significance in growing process.Due to the nitrogen fertility of world's soil
Not high, nitrogen is difficult to be accumulated in soil again, and modern intensiveization agricultural promotes the excessive loss of the soil organism and nitrogen, many
The units increased in production of unit nitrogen is higher than phosphorus, potassium nutrition in the case of number.Therefore, since 20th century, the production of nitrogenous fertilizer is at home and abroad always
Occupy very important status.According to investigations, there are more than 80% arable land nitrogen stress, but the average utilization of China's nitrogenous fertilizer simultaneously in China
Only 35% or so.Utilization rate of fertilizer is low not only to cause the waste of nutrient, reduces the economic benefit of agricultural production, and bring
Serious environmental problem.In recent years, many researchers pointed out, if the excessive nitrogenous fertilizer applied in soil can not be direct or indirect
Act on plant, will be percolated in underground water, have a strong impact on environment and human health.Plant recovery of nutrient is improved, especially
One possible approach of nitrogen utilization efficiency is to apply slow release fertilizer.
Current slow-release nitrogen fertilizer mainly have synthetic organic nitrogen fertilizer, coated fertilizer, slow insoluble inorganic fertilizer, with natural organic matter
It is the type of various ammoniated fertilizers four of matrix, wherein most importantly synthetic organic nitrogen fertilizer and coated fertilizer.Synthesis organic nitrogen
It is fertile mainly to include ureaformaldehyde, the urea of isobutylidene two, the gland of butenylidene two, oxamides etc.；Coated fertilizer kind mainly has sulphur bag
Film fertilizer, polymer coated fertilizer, paraffin coated fertilizer, ammonium magnesium phosphate coated fertilizer (such as slow ammonium hydrogen carbonate).By bag
Although membrane meanses can assign chemical fertilizer slow controlled release properties, problems with is also brought simultaneously：Belong to secondary operation, cause production
Cost is improved；Nutrient content reduction in chemical fertilizer, and contain the component that can not be absorbed by crops；The coating of rupture remains in soil
In can pollute.
The content of the invention
The present invention is intended to provide one kind is progressively degraded under soil reclaimed water and microbial action and is hydrolyzed and discharge can quilt
Biodegradable organic polymer nitrogenous fertilizer for the nitrogen that plant absorption is utilized and preparation method thereof.
The present invention is achieved by the following technical solutions：Biodegradable organic polymer nitrogenous fertilizer, its structural formula is：
N=2~200 in formula.
The content of the nutrient nitrogen contained by above-mentioned biodegradable organic polymer nitrogenous fertilizer is in terms of weight/mass percentage composition
It is 27.60wt%~33.13wt%.
Synthetic route invention further provides the biodegradable organic polymer nitrogenous fertilizer is as follows：
Further, in order to be explained in detail to the present invention, there is provided the biodegradable organic polymer nitrogenous fertilizer
Preparation method, its preparation method is：Methyl carbamate, urea and catalyst potassium carbonate are added in reaction vessel, in 160
6h is reacted at DEG C, crosslinking agent triisocyanate is subsequently adding, stirred, when reaction solution is changed into thick, granulation, drying is obtained
Obtain biodegradable organic polymer nitrogenous fertilizer.
In addition, reactant methyl carbamate described in the preparation method is 1.0 with the mol ratio of catalyst potassium carbonate：
0.06.By the research carried out to the first step reaction technique, under this mol ratio, the reaction of the poly- carbonyl urea of synthesis, the i.e. first step
The conversion ratio of product is higher, is optimal process conditions.
The effect of crosslinking agent triisocyanate is that the C=N possessed by its own is crosslinked with the amido of poly- carbonyl urea
Reaction, forms space network, so that poly- carbonyl urea cold water solubility higher is reduced, therefore, add different moles
Crosslinking agent triisocyanate, can obtain the biodegradable organic polymer nitrogen of different cold water solubilities and hot water dissolving's degree
Fertilizer.Said synthesis route be crosslinking agent triisocyanate with poly- carbonyl urea by 1:The process route of 3 molar ratio reaction, three isocyanides
Acid esters and poly- carbonyl urea are identical with above-mentioned process route by the mechanism of other molar ratio reactions, be all triisocyanate C=N with
The cross-linking reaction that the amido of poly- carbonyl urea occurs.
Biodegradable organic polymer nitrogenous fertilizer of the present invention, compared with existing slow Controlled Release Nitrogen Fertilizer, with having as follows
Beneficial effect：
(1) carbon in nitrogenous fertilizer molecule of the present invention, hydrogen, oxygen, nitrogen nutrition element are securely attached to by chemical bond
On same macromolecular chain, can assign nitrogenous fertilizer excellent slow controlled release properties, the full nitrogen released rate in water sweetening of the soil 1 to 20 day is in
Obvious ascendant trend, nutrients release is more slow within 20 to 90 days, can increase substantially the utilization rate of nitrogenous fertilizer；
(2) after biodegradable organic polymer nitrogenous fertilizer of the invention is manured into soil, in the effect of edaphon and water
Under be gradually degraded as small molecule nutriment and be absorbed and used by plants, fixed amount of the soil to nutrient nitrogen can be reduced, also not
Unabsorbable harmful substance can be left to soil, be a kind of fertilizer for meeting environment protection requirement.
Brief description of the drawings
Fig. 1 is between the cold water solubility of biodegradable organic polymer nitrogenous fertilizer and crosslinking agent triisocyanate addition
Relation.As seen from the figure：With the increase of crosslinking agent addition, the cold water solubility of biodegradable organic polymer nitrogenous fertilizer becomes
It is small, because with the increase of crosslinking agent addition, the molecule crosslinked in biodegradable organic polymer nitrogenous fertilizer is not
It is disconnected to increase, therefore cold water solubility diminishes.When crosslinking agent addition is 3g, cold water solubility is 66%；When crosslinking agent is added
Measure during for 15g, cold water solubility is 21%, show the cold water of the addition to biodegradable organic polymer nitrogenous fertilizer of crosslinking agent
Solubility has a great impact.
Fig. 2 is the infrared spectrogram of the biodegradable organic polymer nitrogenous fertilizer that embodiment 1 is obtained.3427cm in figure-1Place
Absworption peak be the secondary amino group N-H keys in-CO-NH-CO- stretching vibration absworption peak, 2922cm-1And 2851cm-1The absorption at place
Peak is-CH2The stretching vibration absworption peak and flexural vibrations absworption peak of-middle c h bond, 1630cm-1The absworption peak at place is-NH-CO-
The stretching vibration absworption peak of C=O double bonds, 1415cm in NH--1And 1383cm-1The absworption peak at place is N-H keys in-CO-NH-CO-
Flexural vibrations absworption peak.It follows that having poly- carbonyl urea-[CO-NH] in the materialn- basic structure, while there is methylene
The appearance of base, shows that crosslinking agent there occurs reaction with poly- carbonyl urea.
Fig. 3 is the nuclear magnetic resonance of the biodegradable organic polymer nitrogenous fertilizer that embodiment 1 is obtained13C-NMR spectrograms.
There is displacement between 160.86ppm, show the carbon atom with-NH-CO-NH- in biodegradable organic polymer nitrogenous fertilizer；
There is displacement at 31.41ppm, show there is mesomethylene carbon；And have displacement at 34.54ppm, indicate crosslinking agent and sent out with poly- carbonyl urea
Reaction is given birth to, the carbon atom absworption peak that result in methylene there occurs change in displacement.Understand that there is carbonyl in the material accordingly
Carbon, while there is the appearance of methylene, can learn that crosslinking agent there occurs reaction with poly- carbonyl urea.By FTIR,13C-NMR total scores
Analysis understands：Crosslinking agent triisocyanate reacts with poly- carbonyl urea and generates the biodegradable organic polymer nitrogenous fertilizer.
Full nitrogen release profiles in the water of the biodegradable organic polymer nitrogenous fertilizer that Fig. 4 is obtained for embodiment 2,3,4 and 5.
As seen from the figure, with the increase of cultivated days, 4 kinds of biodegradable organic polymer nitrogenous fertilizer of different cold water solubilities are in water
Full nitrogen released rate ascendant trend is presented, early stage release is very fast, and later stage release is relatively slow, and cold water solubility is that 20 biology can drop
The total nitrogen content of solution organic polymer nitrogenous fertilizer (S20) release is respectively 30 (S30), 40 (S40) and 50 (S50) less than cold water solubility
Release total nitrogen content.1~20 day, 4 kinds of full nitrogen releases of the biodegradable organic polymer nitrogenous fertilizer of different cold water solubilities
Amount is presented obvious ascendant trend, and cold water solubility is that 20 biodegradable organic polymer nitrogenous fertilizer discharged at the 20th day
Total nitrogen content reach 492.80mg, account for the 34.86% of its initial nitrogen content, cold water solubility is that 30,40 and 50 biology can drop
Organic polymer nitrogenous fertilizer is solved compared with the nitrogen for releasing 49.62%, 62.12% and 100.76% more respectively that cold water solubility is 20,
53.19%, 54.65% and the 68.63% of each of which initial N contents is accounted for respectively.20th~90 day, 4 kinds of different cold-water solutions
The nutrients release of the biodegradable organic polymer nitrogenous fertilizer of degree is more slow, and wherein cold water solubility is that 20 biology can drop
Solution organic polymer nitrogenous fertilizer released the full nitrogen of 555.33mg at the 90th day, accounted for the 39.28% of its initial nitrogen content, and cold water is molten
Xie Du be 30,40 and 50 biodegradable organic polymer nitrogenous fertilizer compared with cold water solubility be 20 release 46.05%,
53.45% and 88.74% nitrogen, accounts for 58.51%, 58.29%, the 72.70% of each of which initial N contents respectively.
Kinetics equation description is carried out to nutrient release curve of the biodegradable organic polymer nitrogenous fertilizer in water, as a result
It is shown in Table 1.
The equation model of Nitrogen Accumulation release rate in the static water releasing test of table 1
As shown in Table 1, Nitrogen Accumulation release of the Elovich equations to biodegradable organic polymer nitrogenous fertilizer in hydrostatic
The degree of fitting of rate is up to more than 0.96, therefore, nitrogen of the biodegradable organic polymer nitrogenous fertilizer of the invention in hydrostatic tires out
Product release rate can be Y=a+blnX with Elovich equation models；Wherein cold water solubility is the 20 organic high score of biodegradable
Nitrogen Accumulation release rate of the sub- nitrogenous fertilizer in hydrostatic can be Y=15.85+5.77lnX, cold-water solution with Elovich equation models
The be fitted to Y=31.32+6.76lnX for 30 is spent, cold water solubility is 40 be fitted to Y=34.39+6.07lnX, cold
Water solubility is 50 be fitted to Y=45.13+7.05lnX；In formula, X be release time (my god), Y be nitrogen nutrient accumulation release
Put rate.
Fig. 5 is that full nitrogen release of the biodegradable organic polymer nitrogenous fertilizer that obtains of embodiment 2,3,4 and 5 in soil is bent
Line.As seen from the figure, with the increase of cultivated days, the biodegradable organic polymer nitrogenous fertilizer of 4 kinds of different cold water solubilities exists
Full nitrogen released rate in soil is presented ascendant trend, and early stage release is very fast, and later stage release is relatively slow, and cold water solubility is 20
The total nitrogen content of the total nitrogen content less than the release that cold water solubility is 30,40 and 50 of biodegradable organic polymer nitrogenous fertilizer release.
1st~20 day, the full nitrogen released rate of 4 kinds of biodegradable organic polymer nitrogenous fertilizer of different cold water solubilities is presented to be gone up faster
The trend of liter, cold water solubility is that 20 biodegradable organic polymer nitrogenous fertilizer released the nitrogen of 53.20mg at the 20th day, is accounted for
The 45.46% of its initial nitrogen content, cold water solubility be 30,40 and 50 biodegradable organic polymer nitrogenous fertilizer it is molten compared with cold water
Xie Du be 20 release 3.51,10.53%, 49.12% nitrogen, account for respectively each of which initial N contents 47.05%,
50.24% and 67.79%；20th~90 day, 4 kinds of nutrients of the biodegradable organic polymer nitrogenous fertilizer of different cold water solubilities
Release is more slow, and cold water solubility is that 20 biodegradable organic polymer nitrogenous fertilizer released 55.07mg at the 90th day
Nitrogen, account for the 47.05% of its initial nitrogen content, cold water solubility is 30,40 and 50 biodegradable organic polymer nitrogenous fertilizer
Compared with the nitrogen for releasing 10.17%, 18.64%, 52.54% more respectively that cold water solubility is 20, each of which is accounted for respectively initial
51.84%, 55.82% and the 71.77% of nitrogen content.To nutrients release of the biodegradable organic polymer nitrogenous fertilizer in soil
Curve carries out kinetics equation description, the results are shown in Table 2.
The equation model of Nitrogen Accumulation release rate in the experiment of the soil incubation of table 2
As shown in Table 2, Nitrogen Accumulation release of the Elovich equations to biodegradable organic polymer nitrogenous fertilizer in soil
The degree of fitting of rate is up to more than 0.91, therefore, nitrogen of the biodegradable organic polymer nitrogenous fertilizer of the invention in soil tires out
Product release rate can be Y=a+blnX with Elovich equation models；Wherein, cold water solubility be 20 biodegradable it is organic high
Nitrogen Accumulation release rate of the molecule nitrogenous fertilizer in soil can be Y=16.03+9.11lnX with Elovich equation models, and cold water is molten
Xie Du is 30 be fitted to Y=20.44+7.83lnX, and cold water solubility is 40 be fitted to Y=29.99+6.28lnX,
Cold water solubility is 50 be fitted to Y=38.77+8.62lnX；In formula, X be release time (my god), Y be nitrogen nutrient accumulation
Release rate.
Specific embodiment
The evaluation index and method of testing used in the present invention are as follows：
Cold water solubility is tested：The dry biodegradable organic polymer nitrogenous fertilizer of 5g (being accurate to 0.0001) is weighed, plus
Enter in 100mL distilled water, shake up, sealing is put into 25 DEG C of climatic chamber.Taken out after standing 24 hours, leaked with G3 cores
Bucket suction filtration, then dries in 80 DEG C of baking ovens, and the percentage that calculating dissolving part accounts for fertilizer total amount obtains cold water solubility.It is cold
Water solubility can represent the content of available nutrient in biodegradable organic polymer nitrogenous fertilizer.
Hot water dissolving's degree is tested：The dry biodegradable organic polymer nitrogenous fertilizer of 5g (being accurate to 0.0001) is weighed, plus
Enter in the single-necked flask of 250mL, add 100mL distilled water, be heated to reflux 24 hours, be cooled to room temperature, use G3 sand core funnels
Suction filtration, filter cake is placed in 80 DEG C of baking ovens and is dried, and the percentage that calculating dissolving part accounts for fertilizer total amount obtains hot water dissolving's degree.
Hot water dissolving's degree can represent the content of long-acting slow-release nutrient in biodegradable organic polymer nitrogenous fertilizer.
Chemical constitution is characterized：Using infrared spectrum and nuclear magnetic resonance13C-NMR is composed.
Delay controlled release properties test in water：Weigh 5.00g biodegradable organic polymer nitrogenous fertilizer and put into and steamed equipped with 100mL
In the blake bottle of distilled water, sealing is after culture in 25 DEG C of constant temperature and humidity incubator.Respectively at the 1st, 3,5,7,10,20,30,
45th, the solution in blake bottle was filtered in 60,90 days, leaches fertilizer and return to former bottle, and add new distilled water 100mL to continue to train
Support.Using the total nitrogen content of Kjeldahl nitrogen determination filtrate.
Slow controlled release properties test in soil：Experiment soil takes from the topsoil soil in Shanxi province Taiyuan city Jiancaoping District Shang Lan villages
Earth, its basic physicochemical property is pH 8.1, organic matter 9.8g/kg, total soil nitrogen 95.2mg/kg.By experiment soil natural air drying
1mm sieves are crossed afterwards, 200.00g soil is weighed and is uniformly mixed with 0.40g biodegradable organic polymer nitrogenous fertilizer, put into blake bottle
In, 40% distilled water (accounting for the relative water content of soil) is added, put into 25 DEG C of constant temperature and humidity incubator and cultivate.Respectively
Sampled in the 1st, 3,5,7,10,20,30,45,60,90 days, after soil and fertilizer are separated, using Kjeldahl nitrogen determination soil
In total nitrogen content.
Embodiment 1
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is：
1.00mol methyl carbamates, 0.10mol urea and 0.06mol catalyst potassium carbonate are added in reaction vessel,
In 6h is reacted at 160 DEG C, 0.33mol crosslinking agent triisocyanates are subsequently adding, stirred, when reaction solution is changed into thick,
Granulation, drying obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 2%, and hot water dissolving's degree is 32%.
Embodiment 2
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is：
1.00mol methyl carbamates, 0.10mol urea and 0.06mol catalyst potassium carbonate are added in reaction vessel,
In 6h is reacted at 160 DEG C, 0.026mol crosslinking agent triisocyanates are subsequently adding, stirred, when reaction solution is changed into thick,
Granulation, drying obtains biodegradable organic polymer nitrogenous fertilizer.
The nitrogen content of gained biodegradable organic polymer nitrogenous fertilizer is 27.76%, and cold water solubility is 20%, and hot water is molten
Xie Du is 75%.
Embodiment 3
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is：
1.00mol methyl carbamates, 0.10mol urea and 0.06mol catalyst potassium carbonate are added in reaction vessel,
In 6h is reacted at 160 DEG C, 0.02mol crosslinking agent triisocyanates are subsequently adding, stirred, when reaction solution is changed into thick,
Granulation, drying obtains biodegradable organic polymer nitrogenous fertilizer.
The nitrogen content of gained biodegradable organic polymer nitrogenous fertilizer is 28.25%, cold water solubility is 30%, hot water
Solubility is 81%.
Embodiment 4
1.00mol methyl carbamates, 0.10mol urea and 0.06mol catalyst potassium carbonate are added in reaction vessel,
In 6h is reacted at 160 DEG C, 0.015mol crosslinking agent triisocyanates are subsequently adding, stirred, when reaction solution is changed into thick,
Granulation, drying obtains biodegradable organic polymer nitrogenous fertilizer.
The nitrogen content of gained biodegradable organic polymer nitrogenous fertilizer is 28.79%, and cold water solubility is 40%, and hot water is molten
Xie Du is 85%.
Embodiment 5
1.00mol methyl carbamates, 0.10mol urea and 0.06mol catalyst potassium carbonate are added in reaction vessel,
In 6h is reacted at 160 DEG C, 0.011mol crosslinking agent triisocyanates are subsequently adding, stirred, when reaction solution is changed into thick,
Granulation, drying obtains biodegradable organic polymer nitrogenous fertilizer.
The nitrogen content of gained biodegradable organic polymer nitrogenous fertilizer is 29.26%, and cold water solubility is 50%,
Hot water dissolving's degree is 89%.
Embodiment 6
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is：
1.00mol methyl carbamates, 0.50mol urea and 0.06mol catalyst potassium carbonate are added in reaction vessel,
In 6h is reacted at 160 DEG C, 0.03mol crosslinking agent triisocyanates are subsequently adding, stirred, when reaction solution is changed into thick,
Granulation, drying obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 9%, and hot water dissolving's degree is 39%.
Embodiment 7
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is：
1.00mol methyl carbamates, 0.01mol urea and 0.06mol catalyst potassium carbonate are added in reaction vessel,
In 6h is reacted at 160 DEG C, 0.015mol crosslinking agent triisocyanates are subsequently adding, stirred, when reaction solution is changed into thick,
Granulation, drying obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 73%, and hot water dissolving's degree is 100%.
Embodiment 8
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is：
1.00mol methyl carbamates, 0.005mol urea and 0.06mol catalyst carbonic acid are added in reaction vessel
Potassium, in 6h is reacted at 160 DEG C, is subsequently adding 0.02mol crosslinking agent triisocyanates, stirring, when reaction solution is changed into thick
When, granulation, drying obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 69%, and hot water dissolving's degree is 98%.
Embodiment 9
Biodegradable organic polymer nitrogenous fertilizer, its preparation method is：
1.00mol methyl carbamates, 0.0067mol urea and 0.06mol catalyst carbonic acid are added in reaction vessel
Potassium, in 6h is reacted at 160 DEG C, is subsequently adding 0.04mol crosslinking agent triisocyanates, stirring, when reaction solution is changed into thick
When, granulation, drying obtains biodegradable organic polymer nitrogenous fertilizer.
The cold water solubility of gained biodegradable organic polymer nitrogenous fertilizer is 58%, and hot water dissolving's degree is 92%.
Embodiment 10：The checking and evaluation of the nitrogen nutrient preparation forecast model in hydrostatic
When the nitrogenous fertilizer of different cold water solubilities discharges the 20th day in hydrostatic, tested with Nitrogen releasing amount and preparation
The forecast model is demonstrate,proved, results contrast is shown in Table 3.It can be seen that the relative error of predicted value and measured value can be controlled within 5%, therefore
The nitrogen nutrient preparation forecast model of the nitrogenous fertilizer in hydrostatic of the different cold water solubilities set up using the present invention, can be with
Predict that cold water solubility is 20,30,40, the 50 nitrogen nutrient cumulative releases under different release times in hydrostatic fast and reliablely
Rate.
The predicted value and measured value of the nitrogenous fertilizer nitrogen nutrient preparation of the different cold water solubilities of table 3
Embodiment 11：The checking and evaluation of the nitrogen nutrient preparation forecast model in soil
When the nitrogenous fertilizer of different cold water solubilities discharges the 20th day in soil, tested with Nitrogen releasing amount and preparation
The forecast model is demonstrate,proved, results contrast is shown in Table 4.It can be seen that the relative error of predicted value and measured value can be controlled within 5%, therefore
The nitrogen nutrient preparation forecast model of the nitrogenous fertilizer in soil of the different cold water solubilities set up using the present invention, can be with
Predict that cold water solubility is 20,30,40, the 50 nitrogen nutrient cumulative releases under different release times in soil fast and reliablely
Rate.
The predicted value and measured value of the nitrogenous fertilizer nitrogen nutrient preparation of the different cold water solubilities of table 4
Claims (5)
1. biodegradable organic polymer nitrogenous fertilizer, it is characterised in that its structural formula is：
N=2~200 in formula.
2. biodegradable organic polymer nitrogenous fertilizer according to claim 1, it is characterised in that its preparation method is：
Methyl carbamate, urea and catalyst potassium carbonate are added toward reaction vessel, in reacting 6 h, Ran Houjia at 160 DEG C
Enter crosslinking agent triisocyanate, stir, when reaction solution is changed into thick, granulation, drying obtains biodegradable organic high
Molecule nitrogenous fertilizer.
3. biodegradable organic polymer nitrogenous fertilizer according to claim 2, it is characterised in that described in the preparation method
Reactant methyl carbamate is 1.0 with the mol ratio of catalyst potassium carbonate：0.06.
4. biodegradable organic polymer nitrogenous fertilizer according to claim 2, it is characterised in that to the biodegradable
Nutrient release curve of the organic polymer nitrogenous fertilizer in hydrostatic is analyzed, and can obtain the nitrogenous fertilizer of different cold water solubilities quiet
Nitrogen nutrient preparation forecast model in water：
Cold water solubility is 20 Nitrogen Accumulation release rate forecast model：Y=15.85+5.77lnX；
Cold water solubility is 30 Nitrogen Accumulation release rate forecast model：Y=31.32+6.76lnX；
Cold water solubility is 40 Nitrogen Accumulation release rate forecast model：Y=34.39+6.07lnX；
Cold water solubility is 50 Nitrogen Accumulation release rate forecast model：Y=45.13+7.05lnX；
In formula, X is release time, day；
Y is nitrogen nutrient preparation.
5. biodegradable organic polymer nitrogenous fertilizer according to claim 2, it is characterised in that to the biodegradable
Nutrient release curve of the organic polymer nitrogenous fertilizer in soil is analyzed, and can obtain the nitrogenous fertilizer of different cold water solubilities in soil
Nitrogen nutrient preparation forecast model in earth：
Cold water solubility is 20 Nitrogen Accumulation release rate forecast model：Y=16.03+9.11lnX；
Cold water solubility is 30 Nitrogen Accumulation release rate forecast model：Y=20.44+7.83lnX；
Cold water solubility is 40 Nitrogen Accumulation release rate forecast model：Y=29.99+6.28lnX；
Cold water solubility is 50 Nitrogen Accumulation release rate forecast model：Y=38.77+8.62lnX；
In formula, X is release time, day；
Y is nitrogen nutrient preparation.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3684771A (en) * | 1971-03-03 | 1972-08-15 | Du Pont | Polyesters with substituted amine end groups |
| CN1047311A (en) * | 1989-05-19 | 1990-11-28 | 三井东圧化学株式会社 | Poly-(isocyanic acid alkyl phenyl) isocyanuric acid ester, its preparation method and its application |
| CN102260195A (en) * | 2010-05-26 | 2011-11-30 | 北京化工大学 | Method for coproducing alkyl carbamate and alkylamide |
| CN103172538A (en) * | 2011-12-23 | 2013-06-26 | 中国科学院兰州化学物理研究所 | Method for synthesis of carbamate under mild conditions |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7060357B2 (en) * | 2002-10-04 | 2006-06-13 | Basf Corporation | Powder coatings containing symmetrical additives |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3684771A (en) * | 1971-03-03 | 1972-08-15 | Du Pont | Polyesters with substituted amine end groups |
| CN1047311A (en) * | 1989-05-19 | 1990-11-28 | 三井东圧化学株式会社 | Poly-(isocyanic acid alkyl phenyl) isocyanuric acid ester, its preparation method and its application |
| CN102260195A (en) * | 2010-05-26 | 2011-11-30 | 北京化工大学 | Method for coproducing alkyl carbamate and alkylamide |
| CN103172538A (en) * | 2011-12-23 | 2013-06-26 | 中国科学院兰州化学物理研究所 | Method for synthesis of carbamate under mild conditions |
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