CN1314647C - Furfural waste water disposal method capable of producing acetone - Google Patents
Furfural waste water disposal method capable of producing acetone Download PDFInfo
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- CN1314647C CN1314647C CNB2005100169576A CN200510016957A CN1314647C CN 1314647 C CN1314647 C CN 1314647C CN B2005100169576 A CNB2005100169576 A CN B2005100169576A CN 200510016957 A CN200510016957 A CN 200510016957A CN 1314647 C CN1314647 C CN 1314647C
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- acetone
- calcium acetate
- acetic acid
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- furfural
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Abstract
The present invention relates to a furfural waste water processing method capable of producing acetone, which belongs to a method for processing furfural waste water in the technical field of environmental protection. The present invention comprises the following steps: 1. alkaline neutralizing agents are added into the furfural waste water for carrying out a neutralization reaction to generate calcium acetate; 2. the calcium acetate is separated; 3. the acetone is obtained by carrying out thermal decomposition for the calcium acetate. The present invention has the advantages of utilizing low-cost CaCO3, CaO and Ca (OH) 2 as neutralizing agents to carry out neutralization for generating the calcium acetate which is pyrolyzed to generate the acetone, and the load of COD is greatly reduced in after-treatment evaporating condensate liquid, so biochemical treatment and physical treatment are easy to carry out for achieving standard discharge. The present invention has high benefits because the by-product acetone is recovered in the process of processing furfural waste liquid. The income of the by-product acetone in the process of processing each ton of waste water according to the calculation of the treatment of each ton of the waste liquid, so the present invention not only reduces waste water processing cost, but also has high economic benefits.
Description
Technical field
The invention belongs to treatment process, belong to the environmental protection field furfural waste-water.
Background technology
Furfural is the important industrial chemicals of basic organic synthesis, produces a large amount of waste water,wastes gas and industrial residue in process of production, and environment is produced severe contamination.Owing to furfural production would rather outbid to buy the pollution of shifting environment to comparatively serious some developed countries in the world of pollution that environment produces, under-developed country is arrived in its pollution transportation.
The wastewater discharge that this furfural production produces is big, temperature is high, and the pH value is low, acetic acid content 1～2.5%, the high 15000mg/l COD of Pollutant levels
CrThe complicated difficulty of governance process.Biochemical process, the physico-chemical process of adopting all need acetic acid in its waste water is neutralized mostly, and neutralization uses the basic agent amount big, the expense height.
People have made number of research projects on furfural waste-water is administered for many years, adopt several different methods such as neutralization, extraction, distillation, electrodialysis, evaporation concentration, the pollution load that reduction produces environment, because of being subjected to technology, expense, market, all multifactor restrictions of economic dispatch, in vapor phase process and the recovery sodium-acetate, that use on the engineering and few.
Summary of the invention
The invention provides a kind of furfural waste water disposal method that can produce acetone, to solve the problem of the bad processing of low-concentration acetic acid in the present furfural waste-water.The technical scheme that the present invention takes is: comprise the steps:
One, in furfural waste-water, adds alkaline neutraliser, carry out neutralization reaction and generate calcium acetate: bulk, granular, pulverulent lime stone or lime are joined in the furol waste liquid, neutralization acetic acid wherein, make its reaction generate calcium acetate, survey the pH value that this contains the low-concentration acetic acid calcium wasting liquid, adding Wingdale or lime to pH value is 7～8;
Two, separating acetic acid calcium: this contains the waste liquid of low-concentration acetic acid calcium with the aldehyde gas waste heating that produces in the furfural production process, carry out two and imitate evaporation, evaporation concentration calcium acetate content in the waste liquid is 30～40% o'clock, with whizzer separating and dehydrating or the dehydration of employing plate-and-frame filter press, Acetic Acid Glacil calcium is separated, and waste liquor mixes with neutralization back furol waste liquid more again;
Three, calcium acetate carries out thermolysis and gets acetone: the calcium acetate that obtains is carried out thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree～160 degree, resolvent is lime carbonate and acetone, utilizes condenser, with acetone gas be condensed to 56 the degree below obtain liquid product acetone.
The invention has the advantages that, utilize cheap CaCO
3, CaO, Ca (OH)
2As the neutralizing agent generation calcium acetate that neutralizes, again the calcium acetate pyrolysis is generated acetone.Wherein the method for generation, separating acetic acid calcium adopts at present, but does not have further Dichlorodiphenyl Acetate calcium to carry out processing and utilizing at present.In the evaporation condensate after the processing, the COD load descends significantly, is easy to carry out biochemical treatment and materialization and handles, and accomplishes qualified discharge.Be recovered to byproduct acetone in this furol waste liquid treating processes, turn harm into good, turn waste into wealth, promptly recyclable resource reduces environmental pollution, except that working cost, also has higher benefit.Calculate by handling waste liquid per ton, byproduct acetone income can reach 40～50 yuan in the wastewater treatment per ton, has both reduced the waste water treatment expense, and comparatively considerable economic is arranged again.
Embodiment
Embodiment 1
One, in furfural waste-water, adds alkaline neutraliser, carry out neutralization reaction and generate calcium acetate: block Wingdale is joined in the furol waste liquid, and neutralization acetic acid wherein makes its reaction generate calcium acetate, survey the pH value that this contains the low-concentration acetic acid calcium wasting liquid, adding Wingdale to pH value is 7～8;
Two, separating acetic acid calcium: this contains the low-concentration acetic acid calcium wasting liquid with the aldehyde gas waste heating that produces in the furfural production process, utilize 2nd effect evaporator to evaporate, evaporation concentration calcium acetate content in the waste liquid is 30% o'clock, available whizzer separating and dehydrating, Acetic Acid Glacil calcium is separated, and waste liquor mixes with neutralization back furol waste liquid more again;
Three, calcium acetate carries out thermolysis and gets acetone: the calcium acetate that obtains is advanced thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree～160 degree, resolvent is lime carbonate and acetone, utilizes condenser, with acetone gas be condensed to 56 the degree below obtain liquid product acetone.
Embodiment 2
One, in furfural waste-water, adds alkaline neutraliser, carry out neutralization reaction and generate calcium acetate: lime is joined in the furol waste liquid, and neutralization acetic acid wherein makes its reaction generate calcium acetate, survey the pH value that this contains the low-concentration acetic acid calcium wasting liquid, adding lime to pH value is 7～8;
Two, separating acetic acid calcium: this contains the low-concentration acetic acid calcium wasting liquid with the aldehyde gas waste heating that produces in the furfural production process, utilize 2nd effect evaporator to evaporate, evaporation concentration calcium acetate content in the waste liquid is 35% o'clock, the calcium acetate crystal solution is carried out air stream drying, and waste liquor mixes with neutralization back furol waste liquid more again;
Three, calcium acetate carries out thermolysis and gets acetone: the calcium acetate that obtains is advanced thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree～160 degree, resolvent is lime carbonate and acetone, utilizes condenser, with acetone gas be condensed to 56 the degree below obtain liquid product acetone.
Embodiment 3
One, in furfural waste-water, adds alkaline neutraliser, carry out neutralization reaction and generate calcium acetate: granular Wingdale is joined in the furol waste liquid, and neutralization acetic acid wherein makes its reaction generate calcium acetate, survey the pH value that this contains the low-concentration acetic acid calcium wasting liquid, adding Wingdale to pH value is 7～8;
Two, separating acetic acid calcium: this contains the low-concentration acetic acid calcium wasting liquid with the aldehyde gas waste heating that produces in the furfural production process, utilize 2nd effect evaporator to evaporate, evaporation concentration calcium acetate solids content in the waste liquid is 40% o'clock, the calcium acetate crystal solution is carried out spraying drying, and waste liquor mixes with neutralization back furol waste liquid more again;
Three, calcium acetate carries out thermolysis and gets acetone: the calcium acetate that obtains is advanced thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree～160 degree, resolvent is lime carbonate and acetone, utilizes condenser, with acetone gas be condensed to 56 the degree below obtain liquid product acetone.
Embodiment 4
One, in furfural waste-water, adds alkaline neutraliser, carry out neutralization reaction and generate calcium acetate: pulverulent lime stone is joined in the furol waste liquid, and neutralization acetic acid wherein makes its reaction generate calcium acetate, survey the pH value that this contains the low-concentration acetic acid calcium wasting liquid, adding Wingdale to pH value is 7～8;
Two, separating acetic acid calcium: this contains the low-concentration acetic acid calcium wasting liquid with the aldehyde gas waste heating that produces in the furfural production process, utilize 2nd effect evaporator to evaporate, evaporation concentration calcium acetate content in the waste liquid is 30% o'clock, the dehydration of employing plate-and-frame filter press, Acetic Acid Glacil calcium is separated, and waste liquor mixes with neutralization back furol waste liquid more again;
Three, calcium acetate carries out thermolysis and gets acetone: the calcium acetate that obtains is advanced thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree～160 degree, resolvent is lime carbonate and acetone, utilizes condenser, with acetone gas be condensed to 56 the degree below obtain liquid product acetone.
Claims (1)
1, a kind of furfural waste water disposal method that can produce acetone comprises the following steps:
One, in furfural waste-water, adds alkaline neutraliser, carry out neutralization reaction and generate calcium acetate: bulk, granular, pulverulent lime stone or lime are joined in the furol waste liquid, neutralization acetic acid wherein, make its reaction generate calcium acetate, survey the pH value that this contains the low-concentration acetic acid calcium wasting liquid, adding Wingdale or lime to pH value is 7～8;
Two, separating acetic acid calcium: this contains the waste liquid of low-concentration acetic acid calcium with the aldehyde gas waste heating that produces in the furfural production process, carry out two and imitate evaporation, evaporation concentration calcium acetate content in the waste liquid is 30～40% o'clock, with whizzer separating and dehydrating or the dehydration of employing plate-and-frame filter press, Acetic Acid Glacil calcium is separated, and waste liquor mixes with neutralization back furol waste liquid more again;
Three, calcium acetate carries out thermolysis and gets acetone: the calcium acetate that obtains is carried out thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree～160 degree, resolvent is lime carbonate and acetone, utilizes condenser, with acetone gas be condensed to 56 the degree below obtain liquid product acetone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100169576A CN1314647C (en) | 2005-07-13 | 2005-07-13 | Furfural waste water disposal method capable of producing acetone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100169576A CN1314647C (en) | 2005-07-13 | 2005-07-13 | Furfural waste water disposal method capable of producing acetone |
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| CN1762954A CN1762954A (en) | 2006-04-26 |
| CN1314647C true CN1314647C (en) | 2007-05-09 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376495C (en) * | 2006-09-13 | 2008-03-26 | 吉林省环科环保技术有限公司 | Cleansing production method for producing furfural with zero dischrge of waste water |
| CN101671246B (en) * | 2009-09-23 | 2013-01-09 | 无锡百川化工股份有限公司 | Method for producing sodium acetate trihydrate and anhydrous sodium acetate as byproducts |
| CN102219666A (en) * | 2011-04-20 | 2011-10-19 | 同济大学 | Method for preparing acetone and calcium formate by using biomass wastes |
| CN103043843B (en) * | 2012-12-28 | 2014-04-30 | 山东金缘生物科技有限公司 | Device and method for extracting sodium acetate from tower bottom wastewater of primary tower in furfural production |
| CN106311081A (en) * | 2016-10-21 | 2017-01-11 | 大连理工大学 | Disacidifying device and method in intermittent hydrolysis kettle |
| CN110294668A (en) * | 2019-04-07 | 2019-10-01 | 上海九笙新材料科技有限公司 | A method of producing natural acetone |
| CN110040894A (en) * | 2019-04-16 | 2019-07-23 | 南京工业大学 | A kind of processing method of the low-concentration acetic acid wastewater containing mineral acid and organic impurities |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629151A (en) * | 2004-10-09 | 2005-06-22 | 刘显臣 | Process waste water discharging free method for the production of furfural |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629151A (en) * | 2004-10-09 | 2005-06-22 | 刘显臣 | Process waste water discharging free method for the production of furfural |
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