CN105198716A - Acetone-generating method for treating furfural wastewater - Google Patents
Acetone-generating method for treating furfural wastewater Download PDFInfo
- Publication number
- CN105198716A CN105198716A CN201410280669.0A CN201410280669A CN105198716A CN 105198716 A CN105198716 A CN 105198716A CN 201410280669 A CN201410280669 A CN 201410280669A CN 105198716 A CN105198716 A CN 105198716A
- Authority
- CN
- China
- Prior art keywords
- calcium acetate
- acetone
- waste
- calcium
- acetic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses an acetone-generating method for treating furfural wastewater. The method includes the steps that 1, antalkalies are added into the furfural wastewater, and a neutral reaction is carried out to generate calcium acetate, wherein blocky or granular or powdery limestone or lime is added into the furfural wastewater to neutralize acetic acid in the furfural wastewater, the limestone or the lime is reacted with the acetic acid to generate the calcium acetate, the pH value of the waste liquid with the low-concentration calcium acetate is measured, and limestone or lime is added till the pH value ranges from 7 to 8; 2, the calcium acetate is separated, wherein the waste liquid with the low-concentration calcium acetate is heated through waste heat of aldehyde gas generated in the furfural production process, double-effect evaporation is carried out, the waste liquid is evaporated and concentrated, when the content of the calcium acetate in the waste liquid ranges from 30% to 40%, separating and dewatering are carried out through a centrifugal machine or dewatering is carried out through a plate-and-frame filter press, the crystallized calcium acetate is separated, and waste mother liquid is remixed with the neutralized furfural waste liquid; 3, the calcium acetate is thermally decomposed to obtain acetone, wherein the obtained calcium acetate is thermally decomposed in a closed device, the decomposing temperature ranges from 140 DEG C to 160 DEG C, the decomposing products are calcium carbonate and the acetone, the gas acetone is condensed to the temperature lower than 56 DEG C through a condenser, and a liquid acetone product is obtained.
Description
Technical field
The invention belongs to the treatment process to furfural waste-water, belong to field of Environment Protection.
Background technology
Furfural is the important industrial chemicals of basic organic synthesis, produces a large amount of waste water,waste gas and industrial residue in process of production, produces severe contamination to environment.Because furfural production would rather outbid to buy and the pollution of transfer to environment, by its pollution transportation to under-developed country to comparatively serious some developed countries in the world of pollution that environment produces.
The wastewater discharge that this furfural production produces is large, temperature is high, and pH value is low, acetic acid content 1 ~ 2.5%, Pollutant levels height 15000mg/lCOD
cr.The complicated difficulty of governance process.Adopt biochemical process, physico-chemical process more, mostly all need to neutralize acetic acid in its waste water, neutralization uses basic agent amount large, costly.
People have done a large amount of research work on furfural waste-water is administered for many years, adopt the multiple methods such as neutralization, extraction, distillation, electrodialysis, evaporation concentration, reduce the pollution load that environment is produced, because being subject to technology, expense, market, the restriction of economic dispatch factors, except in vapor phase process and except recovery of acetic acid sodium, what engineering was applied is also few.
Summary of the invention
The invention provides a kind of furfural waste water disposal method with generation acetone, to solve the problem of the bad process of low-concentration acetic acid in current furfural waste-water.
The technical scheme that the present invention takes is: comprise the steps:
One, in furfural waste-water, alkaline neutraliser is added, carry out neutralization reaction and generate calcium acetate: bulk, granular, pulverulent lime stone or lime are joined in furol waste liquid, neutralization acetic acid wherein, it is made to react generation calcium acetate, survey the pH value that this contains low-concentration acetic acid calcium wasting liquid, add Wingdale or lime to pH value is 7 ~ 8;
Two, separating acetic acid calcium: should containing the waste liquid of low-concentration acetic acid calcium by the aldehyde gas waste heating produced in furfural production process, carry out two effect evaporations, when in evaporation concentration to waste liquid, calcium acetate content is 30 ~ 40%, with whizzer separating and dehydrating or the dehydration of employing plate-and-frame filter press, be separated by Acetic Acid Glacil calcium, waste liquor mixes with furol waste liquid after neutralization more again;
Three, calcium acetate carries out thermolysis and obtains acetone: the calcium acetate obtained is carried out thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree ~ 160 degree, resolvent is calcium carbonate and acetone, utilizes condenser, acetone gas is condensed to less than 56 degree and obtains liquid product acetone.
The invention has the advantages that, utilize cheap CaCO
3, CaO, Ca (OH)
2carry out neutralization as neutralizing agent and generate calcium acetate, then 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 evaporation condensate after process, COD load significantly declines, and is easy to carry out biochemical treatment and materializing strategy, accomplishes qualified discharge.Be recovered to byproduct acetone in this furol waste liquid treating processes, turn harm into good, turn waste into wealth, get final product Resource recovery, reduce environmental pollution, except working cost, also have higher benefit.Calculate by process waste liquid per ton, in wastewater treatment per ton, byproduct acetone income can reach 40 ~ 50 yuan, has both reduced waste water treatment expense, has again comparatively considerable economic benefit.
Embodiment
Embodiment 1
One, in furfural waste-water, alkaline neutraliser is added, carry out neutralization reaction and generate calcium acetate: join in furol waste liquid by block Wingdale, neutralization acetic acid wherein, makes it react generation calcium acetate, survey the pH value that this contains low-concentration acetic acid calcium wasting liquid, adding Wingdale to pH value is 7 ~ 8;
Two, separating acetic acid calcium: should containing low-concentration acetic acid calcium wasting liquid by the aldehyde gas waste heating produced in furfural production process, 2nd effect evaporator is utilized to evaporate, when in evaporation concentration to waste liquid, calcium acetate content is 30%, available whizzer separating and dehydrating, be separated by Acetic Acid Glacil calcium, waste liquor mixes with furol waste liquid after neutralization more again;
Three, calcium acetate carries out thermolysis and obtains acetone: the calcium acetate obtained is entered thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree ~ 160 degree, resolvent is calcium carbonate and acetone, utilizes condenser, acetone gas is condensed to less than 56 degree and obtains liquid product acetone.
Embodiment 2
One, in furfural waste-water, alkaline neutraliser is added, carry out neutralization reaction and generate calcium acetate: joined by lime in furol waste liquid, neutralization acetic acid wherein, makes it react generation calcium acetate, survey the pH value that this contains low-concentration acetic acid calcium wasting liquid, adding lime to pH value is 7 ~ 8;
Two, separating acetic acid calcium: should containing low-concentration acetic acid calcium wasting liquid by the aldehyde gas waste heating produced in furfural production process, 2nd effect evaporator is utilized to evaporate, when in evaporation concentration to waste liquid, calcium acetate content is 35%, calcium acetate crystal solution is carried out air stream drying, and waste liquor mixes with furol waste liquid after neutralization more again;
Three, calcium acetate carries out thermolysis and obtains acetone: the calcium acetate obtained is entered thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree ~ 160 degree, resolvent is calcium carbonate and acetone, utilizes condenser, acetone gas is condensed to less than 56 degree and obtains liquid product acetone.
Embodiment 3
One, in furfural waste-water, alkaline neutraliser is added, carry out neutralization reaction and generate calcium acetate: join in furol waste liquid by granular Wingdale, neutralization acetic acid wherein, makes it react generation calcium acetate, survey the pH value that this contains low-concentration acetic acid calcium wasting liquid, adding Wingdale to pH value is 7 ~ 8;
Two, separating acetic acid calcium: should containing low-concentration acetic acid calcium wasting liquid by the aldehyde gas waste heating produced in furfural production process, 2nd effect evaporator is utilized to evaporate, when in evaporation concentration to waste liquid, calcium acetate solids content is 40%, calcium acetate crystal solution is carried out spraying dry, and waste liquor mixes with furol waste liquid after neutralization more again;
Three, calcium acetate carries out thermolysis and obtains acetone: the calcium acetate obtained is entered thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree ~ 160 degree, resolvent is calcium carbonate and acetone, utilizes condenser, acetone gas is condensed to less than 56 degree and obtains liquid product acetone.
Claims (1)
1. one kind has the furfural waste water disposal method producing acetone, comprise the following steps: one, in furfural waste-water, add alkaline neutraliser, carry out neutralization reaction and generate calcium acetate: bulk, granular, pulverulent lime stone or lime are joined in furol waste liquid, neutralization acetic acid wherein, it is made to react generation calcium acetate, survey the pH value that this contains low-concentration acetic acid calcium wasting liquid, add Wingdale or lime to pH value is 7 ~ 8; Two, separating acetic acid calcium: should containing the waste liquid of low-concentration acetic acid calcium by the aldehyde gas waste heating produced in furfural production process, carry out two effect evaporations, when in evaporation concentration to waste liquid, calcium acetate content is 30 ~ 40%, with whizzer separating and dehydrating or the dehydration of employing plate-and-frame filter press, be separated by Acetic Acid Glacil calcium, waste liquor mixes with furol waste liquid after neutralization more again; Three, calcium acetate carries out thermolysis and obtains acetone: the calcium acetate obtained is carried out thermolysis in Sealing Arrangement, its decomposition temperature is 140 degree ~ 160 degree, resolvent is calcium carbonate and acetone, utilizes condenser, acetone gas is condensed to less than 56 degree and obtains liquid product acetone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410280669.0A CN105198716A (en) | 2014-06-23 | 2014-06-23 | Acetone-generating method for treating furfural wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410280669.0A CN105198716A (en) | 2014-06-23 | 2014-06-23 | Acetone-generating method for treating furfural wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105198716A true CN105198716A (en) | 2015-12-30 |
Family
ID=54946721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410280669.0A Pending CN105198716A (en) | 2014-06-23 | 2014-06-23 | Acetone-generating method for treating furfural wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105198716A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107021881A (en) * | 2016-12-27 | 2017-08-08 | 榆林职业技术学院 | A kind of acetic acid devil liquor recovery Application way |
| CN110040894A (en) * | 2019-04-16 | 2019-07-23 | 南京工业大学 | Method for treating low-concentration acetic acid wastewater containing mineral acid and organic impurities |
| CN110040896A (en) * | 2019-04-16 | 2019-07-23 | 南京工业大学 | Method for treating low-concentration acetic acid wastewater containing sulfuric acid |
| CN110040895A (en) * | 2019-04-16 | 2019-07-23 | 南京工业大学 | Treatment method of low-concentration acetic acid wastewater containing metal ions and organic impurities |
| CN110117116A (en) * | 2019-04-16 | 2019-08-13 | 南京工业大学 | Method for treating low-concentration acetic acid wastewater containing sulfate |
| 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 |
-
2014
- 2014-06-23 CN CN201410280669.0A patent/CN105198716A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107021881A (en) * | 2016-12-27 | 2017-08-08 | 榆林职业技术学院 | A kind of acetic acid devil liquor recovery Application way |
| 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 | Method for treating low-concentration acetic acid wastewater containing mineral acid and organic impurities |
| CN110040896A (en) * | 2019-04-16 | 2019-07-23 | 南京工业大学 | Method for treating low-concentration acetic acid wastewater containing sulfuric acid |
| CN110040895A (en) * | 2019-04-16 | 2019-07-23 | 南京工业大学 | Treatment method of low-concentration acetic acid wastewater containing metal ions and organic impurities |
| CN110117116A (en) * | 2019-04-16 | 2019-08-13 | 南京工业大学 | Method for treating low-concentration acetic acid wastewater containing sulfate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105198716A (en) | Acetone-generating method for treating furfural wastewater | |
| CN106865571B (en) | Method for preparing sodium bicarbonate and ammonium sulfate from chemical concentrated brine | |
| CN204251456U (en) | Evaporative crystallization is adopted to realize the device of Coal Chemical Industry height strong brine recycling | |
| CN103408460B (en) | Recovery method of secondary products of iminodiacetonitrile and mother liquid treatment method | |
| CN103342434B (en) | Treatment method of wastewater generated in cyclization step in production process of epoxy chloropropane from glycerol | |
| CN104829271A (en) | Method for preparing calcium magnesium ammonium phosphate and calcium magnesium ammonium nitrate from phosphor tailings | |
| CN1314647C (en) | Furfural waste water disposal method capable of producing acetone | |
| CN103241885A (en) | Method for treating acid waste water of disperse dye | |
| CN103342398B (en) | Method for recovering high-purity organic salt from phosphorous-containing industrial wastewater | |
| CN104495953A (en) | Process for treating industrial waste hydrochloric acid in recycling way through salt fractionation method | |
| CN105923646A (en) | Resource comprehensive utilization for salty mud | |
| CN104386870A (en) | Coal chemical high concentrated brine evaporation crystallization recycling process and dedicated system | |
| CN103224261A (en) | Method for extracting inorganic salt in industrial wastewater and method for recycling industrial wastewater | |
| CN205528225U (en) | Desulfurization waste water zero release processing system | |
| CN105218338A (en) | A kind for the treatment of process that can produce the furfural waste-water of acetone | |
| CN102070159A (en) | Method for recovering ammonia from solid-state inorganic strong acid ammonium salt by utilizing quick lime | |
| CN105293796A (en) | Method for co-production of sodalumite and gypsum through activated clay production mother liquid | |
| CN102531263B (en) | Method for treating saponified wastewater generated in production process of epoxy compound | |
| CN103570044A (en) | Method for processing waste mixed liquid of sodium sulfate and ammonium sulfate by using carbonate | |
| CN103819042B (en) | A kind of hydrochloride waste purifying treatment method | |
| CN103435214B (en) | Comprehensive treatment method for formaldehyde-containing acid wastewater | |
| CN102079550B (en) | Waste saline purification technique | |
| CN102836627B (en) | One-step process energy-saving and water-saving cleaning technology for converting smoke carbon dioxide into ardealite | |
| CN103435441B (en) | The method of dimethyl malonate production wastewater treatment and resource reclaim | |
| CN101250067B (en) | Method for producing chemical fertilizer by precipitating ammonium molybdate mother liquor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151230 |
|
| WD01 | Invention patent application deemed withdrawn after publication |