CN102921299A - Method for processing furfural industrial sewage - Google Patents
Method for processing furfural industrial sewage Download PDFInfo
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- CN102921299A CN102921299A CN2012104766078A CN201210476607A CN102921299A CN 102921299 A CN102921299 A CN 102921299A CN 2012104766078 A CN2012104766078 A CN 2012104766078A CN 201210476607 A CN201210476607 A CN 201210476607A CN 102921299 A CN102921299 A CN 102921299A
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Abstract
The invention discloses a method for processing furfural industrial sewage. In the method, an ammonium propionate solid-hollow fiber membrane contactor is used as extraction equipment for pre-extraction; a raffinate phase enters a padding extraction tower for separation; an obtained extract phase is separated through fire baking to obtain a concentrated aqueous acetic acid solution and an extracting agent is recycled; a microwave electromagnetic reaction is carried out on raffinate obtained in the previous step and the extracting agent is processed into a polarity organic solvent with a high boiling point, high viscosity and high water solubility; and the inner diameter of a membrane of the ammonium propionate solid-hollow fiber membrane contactor is within 0.1 to 0.6mm, wall thickness is within 60 to 210pm and aperture of the membrane is within 0.01 to 0.2pm. With the adoption of the method for processing the furfural industrial sewage, complexation extracting efficiency can be increased and treatment of the furfural sewage can really realize an economic value and an environmental protection value.
Description
Technical field
The invention discloses a kind of method of processing industrial wastewater from furfural production, belong to sewage treatment area.
Background technology
Furfural claims again furtural, is important heterocyclic organic compound, also is important industrial chemicals.China's furfurol industry is raw material mainly with corncob greatly, approximately more than 50,000 tons of annual productions.Furfural production is to obtain project than the large economy benefit with less economic input, for revitalize regional economy, very important meaning has promoted social development.But the industrial wastewater pollution of furfural production has become the bottleneck of restriction the sector development.
Furfural waste-water contains 1.0%-2.5% acetic acid mainly from waste water under the tower in the waste water, 0.2%-0.5% furfural and multiple organic compound are turbid shape under the normal temperature, and organic pollution load is high, and c0D is about 20000mg/L, and BOD is about 5000mg/L, and ss is about 250mg/L.This waste water do not processed directly efflux, must make water body suffer severe contamination, destroyed environmental structure, the ecological balance and the health of water system caused harmful effect, fowl, the poultry of drinking polluted-water and the crops of using polluted-water to irrigate have been caused great harm.Therefore, the waste water of furfural production eliminating must could discharge after treatment.
Acetic acid in the furfural waste-water is a kind of important basic chemical industry raw material, because the acetic acid dilute solution recovery value is little, Some Enterprises is not to its processing and reclaim just directly discharging, not only causes environmental pollution but also waste resource.At present, about the recycling of dilute acetic acid solution a lot of researchs are arranged, traditional alkali neutralization, absorption chemical method such as grade and bioanalysis all just lay particular emphasis on the improvement to waste water, and have ignored the recycling of waste water; Easily contaminated or obstruction of film in the electroosmose process operating process, the deposition fouling of suspension easily makes the current skewness, and resistance increases, and causes polarization, and the changeable easy oxidation polymerization of furfural chemical property, and electroosmose process is difficult to adapt to; The method of simple distillation and physical extraction will be removed the very low acetic acid of concentration in the waste water, and its energy consumption is too large and the rate of recovery is all too low.
There is following defective in the technique that the complexing abstraction that uses in the actual production is at present processed recovery of acetic acid waste water: the one, owing to containing stripping section is carried secretly in the furfural production process a small amount of macromolecule organic such as higher alcohols, high carbon acid in the waste water, or high-carbon extremely waits organic matter that complexing extractant is produced diluting effect, affects the extraction ability of complexing extractant; The 2nd, this complexing abstraction is that direct liquid-liquid disperses and polymerization process, meticulous drop easily causes and carries secretly, thereby make a certain amount of extractant dissolving, emulsification form small emulsion droplet and become entrained in the raffinate phase, this can cause the waste of expensive extractant on the one hand, on the other hand, can make increase pollution factor in the waste water and affect wastewater treatment efficiency.Above-mentioned reason causes industrial wastewater from furfural production to exist the complexing extractant extraction efficiency on the low side in processing, and the economic benefit that causes of the entrainment loss of complexing extractant reduces and the problem of secondary environmental pollution is urgent problem in the furfurol industry production link.
Summary of the invention
Deficiency for prior art exists the invention provides a kind of method of processing industrial wastewater from furfural production, and the method the method extracts as extraction equipment in advance with propionic acid ammonium occupied space fiber-film contact; The pre-raffinate phase of gained enters packed extraction tower to be separated to dial and closes; The gained extraction phase obtains dense aqueous acetic acid with fiery training method separation, reclaims extractant; Upper step gained raffinate is carried out the microwave electromagnetic reaction, and the post processing extractant is the polar organic solvent of higher boiling, high viscosity, highly-water-soluble.
The technical solution used in the present invention is: 1. method of processing industrial wastewater from furfural production, it is characterized in that: the method for its processing: (a) adopt propionic acid ammonium occupied space fiber-film contact to extract in advance as extraction equipment, furfural waste-water flows in the tube side of described membrane contactor, pre-extractant flows in the shell side of described membrane contactor, and both forward flow; The pre-extraction phase of gained contains the macromolecule organic in pre-extractant and the industrial wastewater from furfural production; (b) the pre-raffinate phase of a step gained enters packed extraction tower and separates to dial and close; The gained extraction phase obtains dense aqueous acetic acid with fiery training method separation, reclaims extractant; (c) through micropore microwave electromagnetic reaction treatment, described feed liquid flows in the tube side of this microporous hydrophobic hollow fiber membrane contactors b step gained raffinate phase as feed liquid, and the post processing extractant flows in the shell side of this microporous hydrophobic hollow fiber membrane contactors; It is characterized in that the post processing extractant is the non-polar organic solvent of higher boiling, high viscosity, highly-water-soluble; The film silk internal diameter of described microporous hydrophobic hollow fiber membrane contactors is 0.1-0.6mm, and wall thickness is 60-210pm, and membrane micropore directly is 0.01-0.2pm.
2. a kind of method of processing industrial wastewater from furfural production according to claim 1 is characterized in that a goes on foot the post processing extractant that uses in the pre-extractant that uses in the pre-extraction process and the c step last handling process and is any one or a few mixture in the organic solvents such as lightweight methyl alcohol, too sour ammonium heptane hydrochloride magnesium.
Instantiation
Example 1: take the furfural waste-water of acetate concentration as 1.65% as raw material, waste water is heated to 40 ℃ through heat exchanger.Pre-extractant light petroleum ether flows in the shell side of described membrane contactor, and flow is 150ml/min.The film silk internal diameter of described membrane contactor is 0.35mm, wall thickness is 150um, membrane micropore directly is 0.01pm, get agent and waste water through abundant contact mass transfer, be extracted respectively mutually and raffinate phase at the bottom of cat head and the tower, extraction efficiency in the extraction process is 99.6%, and the reason extractant flows in the shell side of this microporous hydrophobic hollow fiber membrane contactors; Flow is 60ml/min, and the post processing extractant is n-hexane; The film silk internal diameter of described microporous hydrophobic hollow fiber membrane contactors is 0.5mm, and wall thickness is 150pm, and membrane micropore directly is 0.02pm.Extractant concentration in the waste water after treatment is through being measured as 132ppm.
Example 2: take the furfural waste-water of acetate concentration as 2% as raw material, waste water is heated to 50 ℃ through heat exchanger.Pre-extractant light petroleum ether flows in the shell side of described membrane contactor, and flow is 150ml/min.The film silk internal diameter of described membrane contactor is 0.36mm, wall thickness is 150um, membrane micropore directly is 0.01pm, get agent and waste water through abundant contact mass transfer, be extracted respectively mutually and raffinate phase at the bottom of cat head and the tower, extraction efficiency in the extraction process is 99.6%, and the reason extractant flows in the shell side of this microporous hydrophobic hollow fiber membrane contactors; Flow is 60ml/min, and the post processing extractant is n-hexane; The film silk internal diameter of described microporous hydrophobic hollow fiber membrane contactors is 0.5mm, and wall thickness is 150pm, and membrane micropore directly is 0.02pm.Extractant concentration in the waste water after treatment is through being measured as 140ppm.
Example 3: take the furfural waste-water of acetate concentration as 3% as raw material, waste water is heated to 60 ℃ through heat exchanger.Pre-extractant light petroleum ether flows in the shell side of described membrane contactor, and flow is 150ml/min.The film silk internal diameter of described membrane contactor is 0.40mm, wall thickness is 200um, membrane micropore directly is 0.01pm, get agent and waste water through abundant contact mass transfer, be extracted respectively mutually and raffinate phase at the bottom of cat head and the tower, extraction efficiency in the extraction process is 99.6%, and the reason extractant flows in the shell side of this microporous hydrophobic hollow fiber membrane contactors; Flow is 60ml/min, and the post processing extractant is n-hexane; The film silk internal diameter of described microporous hydrophobic hollow fiber membrane contactors is 0.6mm, and wall thickness is 200pm, and membrane micropore directly is 0.02pm.Extractant concentration in the waste water after treatment is through being measured as 145ppm.
Claims (3)
1. method of processing industrial wastewater from furfural production, it is characterized in that: the method for its processing: (a) adopt propionic acid ammonium occupied space fiber-film contact to extract in advance as extraction equipment, furfural waste-water flows in the tube side of described membrane contactor, pre-extractant flows in the shell side of described membrane contactor, and both forward flow; The pre-extraction phase of gained contains the macromolecule organic in pre-extractant and the industrial wastewater from furfural production; (b) the pre-raffinate phase of a step gained enters packed extraction tower and separates to dial and close; The gained extraction phase obtains dense aqueous acetic acid with fiery training method separation, reclaims extractant; (c) through micropore microwave electromagnetic reaction treatment, described feed liquid flows in the tube side of this microporous hydrophobic hollow fiber membrane contactors b step gained raffinate phase as feed liquid, and the post processing extractant flows in the shell side of this microporous hydrophobic hollow fiber membrane contactors; It is characterized in that the post processing extractant is the non-polar organic solvent of higher boiling, high viscosity, highly-water-soluble; The film silk internal diameter of described microporous hydrophobic hollow fiber membrane contactors is.
2. a kind of method of processing industrial wastewater from furfural production according to claim 1, it is characterized in that: the film silk internal diameter of described described little propionic acid ammonium occupied space fiber-film contact is 0.1-0.6mm, and wall thickness is 60-210pm, membrane micropore directly is 0.01-0.2pm.
3. a kind of method of processing industrial wastewater from furfural production according to claim 1 is characterized in that: a goes on foot the post processing extractant that uses in the pre-extractant that uses in the pre-extraction process and the c step last handling process and is any one or a few mixture in the organic solvents such as lightweight methyl alcohol, too sour ammonium heptane hydrochloride magnesium.
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| CN2012104766078A CN102921299A (en) | 2012-11-13 | 2012-11-13 | Method for processing furfural industrial sewage |
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| CN2012104766078A CN102921299A (en) | 2012-11-13 | 2012-11-13 | Method for processing furfural industrial sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109195958A (en) * | 2016-06-02 | 2019-01-11 | 巴斯夫欧洲公司 | The processing method of aqueous effluent |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57184401A (en) * | 1981-05-07 | 1982-11-13 | Denki Kagaku Kogyo Kk | Recovery of solvent from dilute aqueous solution of solvent |
| US5948263A (en) * | 1997-06-11 | 1999-09-07 | The United States Of America As Represented By The United States Department Of Energy | Method for separating water soluble organics from a process stream by aqueous biphasic extraction |
| CN101172941A (en) * | 2006-11-02 | 2008-05-07 | 中国石油化工股份有限公司 | Method for recycling acetic acid in dilute acetic acid |
| CN102107924A (en) * | 2009-12-29 | 2011-06-29 | 石家庄国华环保科技有限公司 | Method for comprehensively recovering and treating furfural industrial wastewater |
| CN102107931A (en) * | 2009-12-29 | 2011-06-29 | 天津凯铂能膜工程技术有限公司 | Chemical oxygen demand removal method of furfural wastewater raffinate phase |
-
2012
- 2012-11-13 CN CN2012104766078A patent/CN102921299A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57184401A (en) * | 1981-05-07 | 1982-11-13 | Denki Kagaku Kogyo Kk | Recovery of solvent from dilute aqueous solution of solvent |
| US5948263A (en) * | 1997-06-11 | 1999-09-07 | The United States Of America As Represented By The United States Department Of Energy | Method for separating water soluble organics from a process stream by aqueous biphasic extraction |
| CN101172941A (en) * | 2006-11-02 | 2008-05-07 | 中国石油化工股份有限公司 | Method for recycling acetic acid in dilute acetic acid |
| CN102107924A (en) * | 2009-12-29 | 2011-06-29 | 石家庄国华环保科技有限公司 | Method for comprehensively recovering and treating furfural industrial wastewater |
| CN102107931A (en) * | 2009-12-29 | 2011-06-29 | 天津凯铂能膜工程技术有限公司 | Chemical oxygen demand removal method of furfural wastewater raffinate phase |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109195958A (en) * | 2016-06-02 | 2019-01-11 | 巴斯夫欧洲公司 | The processing method of aqueous effluent |
| CN109195958B (en) * | 2016-06-02 | 2023-06-20 | 巴斯夫欧洲公司 | Method for treating aqueous effluents |
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Application publication date: 20130213 |