CN103768894A - Method for purifying waste gas containing benzene series - Google Patents
Method for purifying waste gas containing benzene series Download PDFInfo
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- CN103768894A CN103768894A CN201210404077.6A CN201210404077A CN103768894A CN 103768894 A CN103768894 A CN 103768894A CN 201210404077 A CN201210404077 A CN 201210404077A CN 103768894 A CN103768894 A CN 103768894A
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- waste gas
- absorbent
- benzene
- gas containing
- benzene series
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Abstract
The invention discloses a method for purifying waste gas containing benzene series. The method comprises the following steps: (1) preparing an absorbent with the mass percentage concentration of 10-70 wt% by mixing an ionic additive with benzene ring with water, wherein the ionic additive with benzene ring is C6H5(CH2)XSO3<2-> or C6H5(CH2)X(CH3)3NBr, and x is 5-9; and (2) adding the absorbent into a reactor, controlling the reaction temperature at 20-60 DEG C, introducing waste gas containing benzene series into the absorbent, controlling the flow rate of the exhaust gas at 50-500 mL/min, and removing benzene series as oil phase in the waste gas. The method realizes removal efficiency of xylene and benzene of 89 wt% and 91wt%, has high removal efficiency, simple operation, wide application and low cost, and provides a feasible and effective method for treatment of organic waste gas.
Description
Technical field
The invention belongs to waste gas purification processing technology field, be specifically related to a kind of purification method that contains benzene homologues waste gas.
Background technology
Benzene homologues comprises benzene,toluene,xylene (being called " triphen ") etc., is exhaust emissions common in industrial waste gas.As the representative pollutant of typical volatile organic waste gas in atmosphere, benzene homologues has brought and has had a strong impact on to environmental and human health impacts.Benzene homologues is the colourless gas with special aromatic odor, causes poisoningly through skin contact and absorption, can cause drowsiness, headache, vomiting etc.It can enter human body by respiratory tract, can make the organs and systems such as people's breathing, blood, liver cause temporary or permanent pathology, is confirmed as poisonous carcinogen by international cancer research institution.In benzene homologues, with the toxicity maximum of benzene, classified as strong carcinogen by WHO.Chronic Benzene Poisoning there will be the neurasthenia symptoms such as headache, insomnia, lassitude, failure of memory, causes alpastic anemia, leukemogenesis etc. when serious.Therefore, the recovery to Typical Volatile Organic benzene homologues and improvement become an important problem in current air contaminant treatment.
Waste gas containing benzene improvement technology is mainly at present: absorption cleaning technology, adsorption and purification technology, catalytic combustion purification techniques and biological cleaning technology.Lower for concentration, adopt catalytic combustion purification techniques without the volatile organic waste gas of recovery value, and higher for concentration more, and have and recycle the volatile organic waste gas being worth that what adopt is absorption and absorption cleaning treatment technology is more.Catalytic combustion system investment and operating cost are all higher; What absorption method often adopted is the sorbing material such as activated carbon, activated carbon fiber, purification efficiency is higher, but there is non-refractory, can not well keep adsorption capacity under moistening condition in it, easy firing, and discarded object activated carbon is disposed or the cost of activated carbon fiber regeneration is larger.Bioanalysis plant investment and operating cost are lower, but can only purifying low-concentration benzene homologues waste gas.Absorption process be a kind of development early and a kind of purification method of technique comparative maturity, the quality of its absorption efficiency depends primarily in the selection of absorbent.CN101259360A discloses a kind of purification method that contains benzene homologues waste gas, and this method purifies the microemulsion of surfactant, cosurfactant and water mixed preparing containing benzene homologues waste gas as absorbent, but this method is to 2000mg/m
3dimethylbenzene or the clearance of benzene be only 80%, 82%.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of purification method that contains benzene homologues waste gas.The clearance of the method dimethylbenzene, benzene is respectively 89wt %, 91wt %, and clearance is high, simple to operate, be widely used, expense is cheap, administers a kind of effective and feasible exhaust gas treatment method is provided for organic compounds.
The purification method that the present invention contains benzene homologues waste gas, comprises the steps:
(1) absorbent is mixed with by ionic additive and water with phenyl ring, and mass percentage concentration is 10wt% ~ 70wt%, and the described ionic additive with phenyl ring is C
6h
5(CH
2)
xsO
3 2-or C
6h
5(CH
2)
x(CH
3)
3nBr, wherein x is 5 ~ 9;
(2) absorbent preparing is joined in reactor, reaction temperature is controlled at 20 ~ 60 ℃, passes into the waste gas containing benzene homologues, and waste gas streams speed control is built in 50 ~ 500mL/min, and the benzene homologues in waste gas is removed as oil phase.
The present invention is containing benzene homologues waste gas purification process key: (1) alkane carbon number x is chosen in 5 ~ 9, is not very long in this interval alkane carbochain forming, more stable thereby absorbent absorbs the microemulsion forming after benzene homologues gas; (2) utilization, with the ionic additive of phenyl ring as absorbent, according to similar compatibility principle, can tightly adsorb the phenyl ring in the triphen passing in absorbent at the phenyl ring of inner side, makes assimilation effect better, and clearance is higher.
The specific embodiment
Below by embodiment, the present invention will be further described.In the present invention, wt% is mass fraction.
Embodiment 1
(1) preparation of absorbent: take the ionic addition of C of 60g with phenyl ring
6h
5(CH
2)
6sO
3 2-, add 90g water, stir 10min, be mixed with the absorbent of mass percentage concentration at 40wt%;
(2) absorbent preparing is joined in reactor, reaction temperature is controlled at 50 ℃;
(3) passing into concentration is 2000mg/m
3dimethylbenzene gas, control gas flow rate is 100mL/min, the duration is 12h, the clearance of paraxylene is 89wt %.
Embodiment 2
(1) preparation of absorbent: take the ionic addition of C of 50g with phenyl ring
6h
5(CH
2)
4(CH
3)
3nBr, adds 35g water, stirs 10min, is mixed with the absorbent of mass percentage concentration at 60wt%;
(2) absorbent preparing is joined in reactor, reaction temperature is controlled at 35 ℃;
(3) passing into concentration is 2000mg/m
3benzene gas, control gas flow rate is 400mL/min, the duration is 12h, the clearance of benzene is 91wt %.
Comparative example 1
According to the method preparation absorption liquid described in embodiment in CN101259360A, pass into and benzene and the dimethylbenzene gas of same concentrations of the present invention, the clearance of benzene to same concentrations of CN101259360A and the inventive method and dimethylbenzene is in table 1.
The clearance contrast of table 1 benzene and dimethylbenzene
| Absorbing material | CN101259360A clearance, wt % | Clearance of the present invention, wt % |
| Dimethylbenzene | 80 | 89 |
| Benzene | 82 | 91 |
From table 1, the clearance of the benzene of the inventive method to same concentrations and dimethylbenzene is apparently higher than the clearance of CN101259360A.
Claims (1)
1. contain a purification method for benzene homologues waste gas, comprise the steps: that (1) absorbent is mixed with by ionic additive and water with phenyl ring, mass percentage concentration is 10wt% ~ 70wt%, and the described ionic additive with phenyl ring is C
6h
5(CH
2)
xsO
3 2-or C
6h
5(CH
2)
x(CH
3)
3nBr, wherein x is 5 ~ 9; (2) absorbent preparing is joined in reactor, reaction temperature is controlled at 20 ~ 60 ℃, passes into the waste gas containing benzene homologues, and waste gas streams speed control is built in 50 ~ 500mL/min, and the benzene homologues in waste gas is removed as oil phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210404077.6A CN103768894B (en) | 2012-10-23 | 2012-10-23 | A kind of purification method containing benzene homologues waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210404077.6A CN103768894B (en) | 2012-10-23 | 2012-10-23 | A kind of purification method containing benzene homologues waste gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103768894A true CN103768894A (en) | 2014-05-07 |
| CN103768894B CN103768894B (en) | 2016-06-29 |
Family
ID=50561935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210404077.6A Active CN103768894B (en) | 2012-10-23 | 2012-10-23 | A kind of purification method containing benzene homologues waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103768894B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5378264A (en) * | 1992-12-02 | 1995-01-03 | Aluminum Company Of America | Microemulsion formation in offgas scrubbing |
| JP2003311124A (en) * | 2002-04-22 | 2003-11-05 | Mitsubishi Heavy Ind Ltd | Exhaust gas treatment method and apparatus |
| US20070107599A1 (en) * | 2005-11-17 | 2007-05-17 | Hoke Jeffrey B | Hydrocarbon adsorption slurry washcoat formulation for use at low temperature |
| CN101259360A (en) * | 2007-12-17 | 2008-09-10 | 昆明理工大学 | Purifying method of waste gases containing benzenes compounds |
| CN101259361A (en) * | 2008-03-24 | 2008-09-10 | 昆明理工大学 | Method for using microemulsion to purify organic waste gases |
-
2012
- 2012-10-23 CN CN201210404077.6A patent/CN103768894B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5378264A (en) * | 1992-12-02 | 1995-01-03 | Aluminum Company Of America | Microemulsion formation in offgas scrubbing |
| JP2003311124A (en) * | 2002-04-22 | 2003-11-05 | Mitsubishi Heavy Ind Ltd | Exhaust gas treatment method and apparatus |
| US20070107599A1 (en) * | 2005-11-17 | 2007-05-17 | Hoke Jeffrey B | Hydrocarbon adsorption slurry washcoat formulation for use at low temperature |
| CN101259360A (en) * | 2007-12-17 | 2008-09-10 | 昆明理工大学 | Purifying method of waste gases containing benzenes compounds |
| CN101259361A (en) * | 2008-03-24 | 2008-09-10 | 昆明理工大学 | Method for using microemulsion to purify organic waste gases |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103768894B (en) | 2016-06-29 |
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