CN1629151A - Process waste water discharging free method for the production of furfural - Google Patents
Process waste water discharging free method for the production of furfural Download PDFInfo
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- CN1629151A CN1629151A CN 200410011121 CN200410011121A CN1629151A CN 1629151 A CN1629151 A CN 1629151A CN 200410011121 CN200410011121 CN 200410011121 CN 200410011121 A CN200410011121 A CN 200410011121A CN 1629151 A CN1629151 A CN 1629151A
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- furfural
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Abstract
The invention discloses a novel method for eliminating waste water discharge during furfural production which comprises, collecting waste liquid exhaust on the distillation tower bottom during furfural production, introducing the waste liquid into a heat exchange pool as cooling liquid, wherein the condensed furfural gas is located in the condensation pipe, heating and condensating the tower bottom waste liquid and charging into the acid trough for furfural production. The invention effectively solve the sewage treatment problem in the furfural production process.
Description
Technical field
The invention belongs to organic acid wastewater treatment method.Refer in particular to improvement to furfural waste water disposal method.
Background technology
The processing wastewater that produces in existing furfural is produced wherein contains certain furfural, acetic acid, sulfuric acid and multiple organic substance, and its pH value reaches 1～2, and COD concentration height can reach more than 20000, handle just it to reach emission standard.At present; each manufacturing enterprise is being perplexed in the processing of furfural waste-water always; many developed countries are not its domestic production; transfer to developing country and buy the furfural product; though the economic benefit of this product is higher; but, also make these enterprises pay attention to processing, but fail to find a kind of better treatment process always furfural waste-water along with the raising of various countries to environmental protection requirement.As adopt the acetic acid absorption method, and carry out biochemical treatment again, only can the pollution abatement degree, but still do not reach emission standard.Adopt in addition to add treatment processs such as alkali neutralization, flocculation sediment, anaerobism, oxygen consumption, these methods existence investments are big, working cost is high, reach the problem that emission compliance still has difficulties.Again just like adopting biochemical process to handle waste water, because of furfural manufacturing enterprise adopts seasonal production, that gives Biochemical pot like this opens, stops bringing more difficulty.
Furfural production technology is simple, ripe, starting material only need corn cob and sulfuric acid, after normally corn cob being pulverized with pulverizer now, add sulfuric acid, stir with acid mixer, send in the hydrolyzer again, feed high heat steam to this hydrolyzer, the gaseous state furfural of collecting the reaction gained with its a part of acetic acid, sulfuric acid that mixes mutually, carry out a condensation, cooling after, enter distillation tower, carry out time condensation, cooling, enter branch aldehyde jar again, neutralizing well, it is refining to enter refining kettle again, after water cooler obtains the finished product furfural.Waste liquid is a pollutent at the bottom of the tower that distillation tower is discharged.
Summary of the invention
The invention provides a kind of furfural produce in the novel method of no processing wastewater discharging, with solve present furfural produce in the wastewater treatment investment greatly, working cost height, the problem of the sewage difficulty up to standard after the processing.The technical scheme that the present invention takes is: waste liquid at the bottom of the tower that the collection base product is discharged down, introduce waste liquid at the bottom of this tower in the heat-exchanger tank respectively, as cooling fluid, be arranged in prolong as the furfural gas that is condensed, will be through heating, waste liquid joins in the complex acid groove of furfural in producing at the bottom of spissated this tower.Another scheme of the present invention is: under the base product of collection at the bottom of the discharge tower waste liquid as cooling fluid, through pervaporation, concentrate after, also can enter in the neutralization reaction pond, add the alkali neutralization, generate serial acetic acid salt.
The invention has the advantages that: waste liquid carries out condensation, cooling to the furfural gas that produces in the furfural production at the bottom of adopting the tower of discharging under the base product, utilizing the heat energy of furfural gas that the water in the waste liquid is heated evaporates, again this waste liquid is concentrated simultaneously, acid solution after should concentrating finally is added back in the hydrolyzer again, utilize once more, so also saved water coolant, real is killing three birds with one stone.The present invention can reclaim the acid of acid content 6～8%, and the acid amount is economized in available production, reclaims 1～3% furfural simultaneously, has increased the yield of furfural.The present invention can solve the problem of the sewage disposal difficulty that produces in the furfural production process effectively, drops into for a short time, can make producer save a large amount of effluent charge.Have very high economic benefit and social benefit.
Embodiment
Embodiment 1
Waste liquid at the bottom of the tower that base product was discharged down during the collection furfural was produced, waste liquid at the bottom of this tower is introduced in the heat-exchanger tank, as cooling fluid, be arranged in prolong as the furfural gas that is condensed, will be through heating, waste liquid joins in the complex acid groove of furfural in producing at the bottom of spissated this tower.
Embodiment 2
Waste liquid at the bottom of the tower that the collection base product is discharged is down introduced waste liquid at the bottom of this tower respectively in the heat-exchanger tank, as cooling fluid, be arranged in prolong as the furfural gas that is condensed, at the bottom of this tower waste liquid through pervaporation, concentrate after, also can enter in the neutralization reaction pond, the neutralization of hydro-oxidation sodium generates sodium-acetate.
Embodiment 3
At embodiment 2, waste liquid enters the neutralization reaction pond at the bottom of the tower after concentrating, and the adding calcium hydroxide neutralization generates calcium acetate.
Claims (2)
1, the novel method of no processing wastewater discharging during a kind of furfural is produced, it is characterized in that: waste liquid at the bottom of the tower that base product was discharged down during the collection furfural was produced, waste liquid at the bottom of this tower is introduced in the heat-exchanger tank, as cooling fluid, be arranged in prolong as the furfural gas that is condensed, will be through heating, waste liquid joins in the complex acid groove of furfural in producing at the bottom of spissated this tower.
2, the furfural new process for producing of no processing wastewater discharging according to claim 1, it is characterized in that: under the base product of collection at the bottom of the discharge tower waste liquid as cooling fluid, through pervaporation, concentrate after, also can enter in the neutralization reaction pond, through adding the alkali neutralization, generate serial acetic acid salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410011121 CN1629151A (en) | 2004-10-09 | 2004-10-09 | Process waste water discharging free method for the production of furfural |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410011121 CN1629151A (en) | 2004-10-09 | 2004-10-09 | Process waste water discharging free method for the production of furfural |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1629151A true CN1629151A (en) | 2005-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410011121 Pending CN1629151A (en) | 2004-10-09 | 2004-10-09 | Process waste water discharging free method for the production of furfural |
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| CN (1) | CN1629151A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314647C (en) * | 2005-07-13 | 2007-05-09 | 杨正学 | Furfural waste water disposal method capable of producing acetone |
| WO2007140661A1 (en) * | 2006-06-07 | 2007-12-13 | Jinan Shengquan Group Share-Holding Co., Ltd. | Method and system for treating wastewater from producing furfural and method and system for producing furfural |
| CN100361986C (en) * | 2006-03-01 | 2008-01-16 | 中国科学院广州化学研究所 | Furaldehyde-degrading cooperative ultrasomic wave and nanometer TiO2 method |
| CN102976539A (en) * | 2011-09-06 | 2013-03-20 | 梨树县银通化工有限公司 | Furfural production wastewater novel technology processing method |
| CN110054336A (en) * | 2019-04-16 | 2019-07-26 | 南京工业大学 | A kind of processing method of the low-concentration acetic acid wastewater containing inorganic metal ion and organic impurities |
-
2004
- 2004-10-09 CN CN 200410011121 patent/CN1629151A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314647C (en) * | 2005-07-13 | 2007-05-09 | 杨正学 | Furfural waste water disposal method capable of producing acetone |
| CN100361986C (en) * | 2006-03-01 | 2008-01-16 | 中国科学院广州化学研究所 | Furaldehyde-degrading cooperative ultrasomic wave and nanometer TiO2 method |
| WO2007140661A1 (en) * | 2006-06-07 | 2007-12-13 | Jinan Shengquan Group Share-Holding Co., Ltd. | Method and system for treating wastewater from producing furfural and method and system for producing furfural |
| US8764947B2 (en) | 2006-06-07 | 2014-07-01 | Jinan Shengquan Group Share-Holding Co., Ltd. | Method and system for disposal of furfural wastewater and method and system for furfural production |
| CN102976539A (en) * | 2011-09-06 | 2013-03-20 | 梨树县银通化工有限公司 | Furfural production wastewater novel technology processing method |
| CN110054336A (en) * | 2019-04-16 | 2019-07-26 | 南京工业大学 | A kind of processing method of the low-concentration acetic acid wastewater containing inorganic metal ion and organic impurities |
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