CN103130844A - Process for synthesizing defoaming agent sucrose fatty acid ester for sugar refining process - Google Patents

Abstract

The invention discloses a process for synthesizing a defoaming agent sucrose fatty acid ester for a sugar refining process. The process comprises the following steps of: (1) preparing an alkali solution for later use: putting 8-20Kg of well-measured alkali into a dissolver, and adding 30-80Kg of water to completely dissolve the alkali; (2) pumping 750-1,500Kg of edible oil and fat into a reaction kettle, adding the alkali solution which is prepared in the step (1), controlling the temperature to be between 80 and 100 DEG C, reacting for 0.5-1 hour, then adjusting the vacuum degree to be between -0.08 and -0.096Mpa, controlling the temperature to be between 105 and 125 DEG C, and dehydrating for 0.5-1 hour; and (3) adding 180-450Kg of finely-ground white sugar and 40-100Kg of a catalyst into the material prepared in the step (2), gradually raising the temperature, and performing thermostatic reaction for 5 hours under the condition that the temperature is between 130 and 140 DEG C and the vacuum degree is between -0.090 and -0.099Mpa, thus obtaining a crude product of the sucrose fatty acid ester. By adopting the process, the production cost is low, a conventional process is refreshed, the labor intensity is low; and the production process is simple, the reaction temperature is low, and the product is simple and convenient to purify, so that high-purity sucrose fatty acid ester can be obtained.

Description

Sugar refining technology defoamer sucrose fatty ester synthesis technique

Technical field

The present invention relates to a kind of sucrose fatty ester synthesis technique, especially a kind of sugar refining technology defoamer sucrose fatty ester synthesis technique.

Background technology

Sucrose fatty ester (abbreviation sucrose ester), english abbreviation SE, it is a large class organic compound that is generated by sucrose and carboxylic acid reaction.It can be decomposed into glucose, lipid acid at human body, and then absorbed as nutrient digestion by human body, and different from general synthetic tensio-active agent, sucrose ester can 100% biological degradation under the condition of aerobic and anaerobism, be conducive to environmental protection, so it is a kind of green, novel, nontoxic nonionogenic tenside.China on June 5th, 1985 the official approval sucrose fatty ester as foodstuff additive.On June 1st, 2008, " food safety national standard foodstuff additive Application standard " GB2760 announced sucrose fatty ester as the sugar refining technology defoamer, and its maximum usage quantity that allows is for to use in right amount by need of production.

Simultaneously, because raw material sucrose and the lipid acid of sucrose ester is renewable resources, the use properties that sucrose ester is good, applied range etc., the extremely attention of scientific and technological circle.In recent decades, the research of sucrose ester has been obtained great achievement, and sucrose ester has become a day by day prosperous industry, its Application Areas is also in continuous expansion.Because its purposes constantly is developed, market potential is huge, has development prospect.

Traditional sugared sugar fatty acid ester synthetic method is chemical method.Because an OH on the sugar ring is numerous, poor with the chemical method synthesis of selective, polymerization can occur in the sugar ring, and be difficult for carrying out the esterification of specific position, have a lot of by products to produce, productive rate is undesirable, and most building-up reactionss are carried out under high temperature, high vacuum, condition is harsher, and energy consumption is high, generally can cause sugared coking; And product is impure, with color.

Synthesis of Sugar Ester through Lipase-catalyzed Reaction is the novel method of the synthetic sugar ester that occurred in recent years, utilize the regioselectivity of lipase, can synthesize the location-specific sugar ester of esterification from carbohydrate and the inexpensive raw material that is easy to get such as lipid acid or triglyceride level easily, and reaction conditions is gentle, easy to operate.Because lipase has highly-solid selectively, regiospecificity and regioselectivity, but thereby the pure sugar ester of synthesizing optical, have important theory significance and using value.

Because sugared and grease do not dissolve mutually, in current organic phase, the direct esterification of carrying out sugar in the strong polar organic solvent systems such as pyridine is mainly adopted in the research of Synthesis of Sugar Ester through Lipase-catalyzed Reaction, or the form of sugar being made ketal or glucosides to be increasing its solvability, or adopts the immobilization system of hydrophilic support absorption sugar and enzyme.Enzymatic synthesis of sugar esters can carry out in the organic solvents such as methyl-sulphoxide and pyridine, but due to Effects of organic solvents, enzymatic one-step reaction productive rate is lower, and because the toxicity of organic solvent makes the sugar ester product be difficult to use in food or medicine.

Summary of the invention

The object of the invention be to provide a kind of cost of development lower, refresh sugar refining technology traditional, that labour intensity is less with defoamer sucrose fatty ester synthesis technique.Not only production technique is simple, temperature of reaction is low, and the product purification is easy, can obtain highly purified sucrose fatty ester.

Be above-mentioned technical problem for solving, technical scheme of the present invention is:

This sugar refining technology defoamer sucrose fatty ester synthesis technique, it comprises the steps:

1. prepare alkaline solution standby: the alkali 8～20Kg that measures is put into dissolver, add the water of 30～80Kg that it is dissolved fully;

2. with in food oils 750～1500Kg suction reactor, add the above-mentioned alkali lye that 1. prepares, temperature is controlled between 80～100 ℃, reacts 0.5～1 hour; Then vacuum tightness is transferred to-0.08MPa～-0.096Mpa, temperature is controlled at 105～125 ℃, dewaters 0.5～1 hour;

3. the white sugar 180～450Kg of fine grinding and catalyzer 40～100Kg are added 2. in material, the temperature that then raises gradually, 130～140 ℃ of temperature, vacuum tightness-0.090～-0.099Mpa under isothermal reaction, reacted 5 hours, namely get the sucrose fatty ester crude product.

Sugar refining technology comprises the steps: with the product purification working method of defoamer sucrose fatty ester synthesis technique

1. extraction:

Crude product is put into extraction kettle, add a certain amount of salt solution, be warming up to 60～85 ℃, material is dissolved fully, then standing demix discharges lower layer of water;

2. dehydration:

The sucrose ester lotion that washing is good is put into dehydrating kettle and is no more than 95 ℃ in temperature ,-0.06～-dewater under the 0.09Mpa vacuum, till making product moisture≤4%.

Beneficial effect of the present invention:

This invention be a kind of production cost lower, refresh traditional, that labour intensity is less sugar refining technology with sucrose fatty ester defoamer synthesis technique.Not only production technique is simple, temperature of reaction is low, and the product purification is easy, can obtain highly purified sucrose fatty ester.

1, reaction system is even, and response behaviour is stable.

This technique is first used food oils and basic catalyst under certain conditions, and reaction generates appropriate emulsifying agent, and this emulsifying agent can impel the response behaviour stable and uniform.

2, the reaction times short, the reaction times is only 5 hours, shortens 6 hours than reaction under normal temperature.

This technique be take vacuum (vacuum is-0.090～-0.099Mpa) under condition, constant temperature impels the reaction times of food oils and white sugar greatly to shorten 130～140 ℃ of reactions.

3, technique reasonable raw material proportioning used.

This technique sugar, oil ratio used is (18～45:75～150), and by the sucrose fatty ester that this proportioning is produced, product structure is unique, and product forms reasonable ratio, is applicable to sugar refining technology each workshop section and makes defoamer, viscosity-depression agent.

Product froth breaking characteristic:

1, have good froth breaking, suds suppressing properties.

The product antifoaming speed is fast, it is long to press down the bubble time, and 250,000 tons of raw material sugarcanes are approximately used the sucrose fatty ester defoamer of 1 ton.

2, have remarkable reduction massecuite (liquid glucose) viscosity, accelerate the clarification settling velocity, strengthen the massecuite convection current, shorten the sugar time of boiling, improve the purging benefit, reduce the molasses gravity purity, improve the function such as the total withdrawal of boiling-off.

Description of drawings

The present invention is further illustrated below in conjunction with the drawings and specific embodiments.

Fig. 1 sucrose fatty ester production technological process.

Embodiment

This sugar refining technology defoamer sucrose fatty ester synthesis technique, it comprises the steps:

1. prepare alkaline solution standby: the alkali 8～20Kg that measures is put into dissolver, add the water of 30～80Kg that it is dissolved fully;

2. with in food oils 750～1500Kg suction reactor, add the 1. alkali lye for preparing, temperature is controlled between 80～100 ℃, reacts 0.5～1 hour;-0.08～-the 0.096MPa vacuum under, temperature is controlled at 105～125 ℃, dewaters 0.5～1 hour;

3. with fine grinding white sugar 180～450Kg and catalyzer 40～100Kg, add in above-mentioned material, then temperature gradually raises, 130～140 ℃ of temperature, vacuum tightness-0.090～-0.099MPa under isothermal reaction 5 hours, obtain thick product, thick product through extracting and refining, dehydration, can be obtained meeting the sucrose fatty ester of GB8272 standard.

Embodiment 1:

Sugar refining technology defoamer sucrose fatty ester synthesis technique, it comprises the steps:

1. prepare solution of potassium carbonate standby: the salt of wormwood 8Kg that measures is put into dissolver, add the water of 30Kg that it is dissolved fully;

2. with in food oils 750Kg suction reactor, add the above-mentioned salt of wormwood liquid that 1. prepares, temperature is controlled between 80 ℃, reacts 0.5 hour; Then vacuum tightness is transferred to-0.08MPaMpa, temperature is controlled at 105 ℃, dewaters 0.5 hour;

3. the white sugar 180Kg of fine grinding and catalyzer 40Kg are added 2. in material, the temperature that then raises gradually, isothermal reaction under 130 ℃ of temperature, vacuum tightness-0.090Mpa was reacted 5 hours, namely got the sucrose fatty ester crude product.

Sugar refining technology comprises the steps: with the product purification working method of defoamer sucrose fatty ester synthesis technique

1. extraction:

Crude product is put into extraction kettle, add a certain amount of salt solution, be warming up to 60 ℃, material is dissolved fully, then standing demix discharges lower layer of water;

2. dehydration:

The sucrose ester lotion that washing is good is put into dehydrating kettle and is no more than 95 ℃ in temperature, dewaters under-0.06Mpa vacuum, till making product moisture≤4%.

Embodiment 2:

Sugar refining technology defoamer sucrose fatty ester synthesis technique, it comprises the steps:

1. prepare alkaline solution standby: the alkali 20Kg that measures is put into dissolver, add the water of 80Kg that it is dissolved fully;

2. with in food oils 1500Kg suction reactor, add the above-mentioned alkali lye that 1. prepares, temperature is controlled between 100 ℃, reacts 1 hour; Then vacuum tightness is transferred to-0.096Mpa, temperature is controlled at 125 ℃, dewaters 1 hour;

3. the white sugar 450Kg of fine grinding and catalyzer 100Kg are added 2. in material, the temperature that then raises gradually, isothermal reaction under 140 ℃ of temperature, vacuum tightness-0.099Mpa was reacted 5 hours, namely got the sucrose fatty ester crude product.

Sugar refining technology comprises the steps: with the product purification working method of defoamer sucrose fatty ester synthesis technique

1. extraction:

Crude product is put into extraction kettle, add a certain amount of salt solution, be warming up to 85 ℃, material is dissolved fully, then standing demix discharges lower layer of water;

2. dehydration:

The sucrose ester lotion that washing is good is put into dehydrating kettle and is no more than 95 ℃ in temperature, dewaters under-0.09Mpa vacuum, till making product moisture≤4%.

Claims (2)

1. a sugar refining technology is with defoamer sucrose fatty ester synthesis technique, and be characterised in that: it comprises the steps:

1. prepare alkaline solution standby: the alkali 8～20Kg that measures is put into dissolver, add the water of 30～80Kg that it is dissolved fully;

2. with in food oils 750～1500Kg suction reactor, add the above-mentioned alkali lye that 1. prepares, temperature is controlled between 80～100 ℃, reacts 0.5～1 hour; Then vacuum tightness is transferred to-0.08MPa～-0.096Mpa, temperature is controlled at 105～125 ℃, dewaters 0.5～1 hour;

3. the white sugar 180～450Kg of fine grinding and catalyzer 40～100Kg are added 2. in material, the temperature that then raises gradually, 130～140 ℃ of temperature, vacuum tightness-0.090～-0.099Mpa under isothermal reaction, reacted 5 hours, namely get the sucrose fatty ester crude product.

2. sugar refining technology according to claim 1 with the product purification working method of defoamer sucrose fatty ester synthesis technique, is characterized in that: comprise the steps:

1. extraction:

Crude product is put into extraction kettle, add a certain amount of salt solution, be warming up to 60～85 ℃, material is dissolved fully, then standing demix discharges lower layer of water;

2. dehydration:

The sucrose ester lotion that washing is good is put into dehydrating kettle and is no more than 95 ℃ in temperature ,-0.06～-dewater under the 0.09Mpa vacuum, till making product moisture≤4%.

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