CN101798121B - Method for recovering and recycling sodium bromide from diethylbutylmalonate waste water - Google Patents
Method for recovering and recycling sodium bromide from diethylbutylmalonate waste water Download PDFInfo
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- CN101798121B CN101798121B CN2009102171780A CN200910217178A CN101798121B CN 101798121 B CN101798121 B CN 101798121B CN 2009102171780 A CN2009102171780 A CN 2009102171780A CN 200910217178 A CN200910217178 A CN 200910217178A CN 101798121 B CN101798121 B CN 101798121B
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- waste water
- sodium bromide
- crystalline hydrate
- diethylbutylmalonate
- recycling
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a method for recovering and recycling sodium bromide from diethylbutylmalonate waste water. The method comprises the following steps of: sending waste water which is generated in a production process of diethylbutylmalonate and contains sodium bromide into an evaporator, and introducing steam into the evaporator to ensure that water in the waste water is evaporated out by using the steam; when the waste water is evaporated and concentrated to the condition that residual water accounts for 8-12 percent of the weight of the sodium bromide, sending an obtained concentrated solution into a cooling pot for cooling to obtain a solid sodium bromide crystalline hydrate; and sending the solid sodium bromide crystalline hydrate to an industrial production line of the diethylbutylmalonate for recycling by using the solid sodium bromide crystalline hydrate as a raw material. The invention provides the method for recovering the solid sodium bromide crystalline hydrate from the waste water generated in the production process of the diethylbutylmalonate and for recycling and producing the diethylbutylmalonate by using the solid sodium bromide crystalline hydrate as a raw material. When the method is used for recovering the sodium bromide, the method has low recovery cost and high recovery rate; meanwhile, the production cost of the diethylbutylmalonate is also greatly reduced.
Description
Technical field
The present invention relates to from diethyl butylmalonate waste water, reclaim the method for Sodium Bromide recycling.
Background technology
Produce a large amount of waste water in the diethyl butylmalonate production process, contain a large amount of Sodium Bromides in this waste water.One ton of diethyl butylmalonate of specifically every production can produce the waste water that contains 0.5 ton of Sodium Bromide, and Sodium Bromide is an indispensable raw material of producing diethyl butylmalonate.As with this discharge of wastewater, both contaminate environment caused the waste of available resources again, also caused the increase of production cost.The technology that reclaims Sodium Bromide from diethyl butylmalonate waste water is also arranged at present.But in these technologies, the technology that reclaims Sodium Bromide is too complicated, not only comprise in the recovery technology and from waste water, reclaim out Sodium Bromide, processing such as purification, decolouring also it have been carried out, cost recovery is increased greatly, and can reduce the rate of recovery of Sodium Bromide significantly, this has also increased the cost recovery and the further use cost of recycle greatly.
Summary of the invention
The purpose of this invention is to provide and reclaim solid brominated sodium crystalline hydrate thing is produced it diethyl butylmalonate again as the recycle of one of raw material method in a kind of waste water that from the diethyl butylmalonate production process, produces.It is low that use present method recovery Sodium Bromide has cost recovery, rate of recovery height.Also can greatly reduce simultaneously the production cost of diethyl butylmalonate.
Technical scheme of the present invention is: reclaim the method for Sodium Bromide recycling from diethyl butylmalonate waste water, it comprises following processing step: in the production process of diethyl butylmalonate, produce a large amount of waste water that contains Sodium Bromide.Above-mentioned waste water is sent in the vaporizer, fed steam and make with steam heating waste water that moisture is steamed in the waste water in vaporizer, the water that is steamed is discharged outside the vaporizer.When the waste water evaporation concentration when residual moisture is the 8-12% of Sodium Bromide weight, strong solution sent into make it naturally cool to normal temperature in the cooling tank.Strong solution can become solid brominated sodium crystalline hydrate thing by idiomorphic crystal in process of cooling.Above-mentioned solid brominated sodium crystalline hydrate thing as the recycling of one of raw material, is about to solid brominated sodium crystalline hydrate thing and sends into and be used for regeneration in the manufacture line of diethyl butylmalonate and produce diethyl butylmalonate.Strong solution in vaporizer is admitted to cooling tank, and the solid brominated sodium crystalline hydrate thing that cooling back forms in the cooling tank can be sent into the new waste water that contains Sodium Bromide again and carry out new one and take turns concentrated, crystallization, recycling operation after seeing off.
Advantage of the present invention has provided and reclaimed solid brominated sodium crystalline hydrate thing is produced it diethyl butylmalonate again as the recycle of one of raw material method in a kind of waste water that produces from the diethyl butylmalonate production process.It is low that use present method recovery Sodium Bromide has cost recovery, rate of recovery height.Also greatly reduced simultaneously the production cost of diethyl butylmalonate.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Accompanying drawing is a process flow sheet of the present invention.
Code name is represented among the figure: 1, the manufacture line of diethyl butylmalonate, 2, vaporizer, 3, cooling tank, A, diethyl butylmalonate waste water, B, steam, C, water, D, strong solution, E, solid brominated sodium crystalline hydrate thing.
Embodiment
As shown in drawings: reclaim the method for Sodium Bromide recycling from diethyl butylmalonate waste water, it comprises following processing step: get waste water A 1000 grams from the manufacture line 1 of diethyl butylmalonate.Above-mentioned waste water A is sent in the vaporizer 2, fed steam B and make with steam B heated waste water A that water C is steamed in the waste water in vaporizer 2, the water that is steamed is discharged outside the vaporizer 2.Waste water A becomes the strong solution D that contains 400 gram Sodium Bromides and 50 gram water after 550 gram water C are removed in evaporation, strong solution D is sent in the cooling tank 3 naturally cool to normal temperature.Strong solution D idiomorphic crystal in process of cooling becomes the solid brominated sodium crystalline hydrate thing E of 450 grams.Above-mentioned solid brominated sodium crystalline hydrate thing E is sent in the manufacture line 1 of diethyl butylmalonate recycle regeneration as one of raw material and produce diethyl butylmalonate.Strong solution in vaporizer 2 is admitted to cooling tank, and the solid brominated sodium crystalline hydrate thing E that cooling back forms in the cooling tank can be sent into new diethyl butylmalonate waste water A again and carry out new one and take turns concentrated, crystallization, recycling operation after seeing off.
Claims (1)
1. from diethyl butylmalonate waste water, reclaim the method for Sodium Bromide recycling, it is characterized in that: it comprises following processing step: in the production process of diethyl butylmalonate, produce a large amount of waste water that contains Sodium Bromide, above-mentioned waste water is sent in the vaporizer, in vaporizer, feed steam and make with steam heating waste water that moisture is steamed in the waste water, the water that is steamed is discharged outside the vaporizer, when the waste water evaporation concentration when residual moisture is the 8-12% of Sodium Bromide weight, strong solution sent into make it naturally cool to normal temperature in the cooling tank, strong solution can become solid brominated sodium crystalline hydrate thing by idiomorphic crystal in process of cooling, with above-mentioned solid brominated sodium crystalline hydrate thing as the recycling of one of raw material, being about to solid brominated sodium crystalline hydrate thing sends into and is used for regeneration in the manufacture line of diethyl butylmalonate and produces diethyl butylmalonate, strong solution in vaporizer is admitted to cooling tank, the solid brominated sodium crystalline hydrate thing that cooling back forms in the cooling tank can be sent into again again after seeing off the new waste water that contains Sodium Bromide carry out new one take turns concentrated, crystallization, the recycling operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102171780A CN101798121B (en) | 2009-12-25 | 2009-12-25 | Method for recovering and recycling sodium bromide from diethylbutylmalonate waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102171780A CN101798121B (en) | 2009-12-25 | 2009-12-25 | Method for recovering and recycling sodium bromide from diethylbutylmalonate waste water |
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| Publication Number | Publication Date |
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| CN101798121A CN101798121A (en) | 2010-08-11 |
| CN101798121B true CN101798121B (en) | 2011-09-28 |
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| CN2009102171780A Expired - Fee Related CN101798121B (en) | 2009-12-25 | 2009-12-25 | Method for recovering and recycling sodium bromide from diethylbutylmalonate waste water |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103073424B (en) * | 2013-01-18 | 2014-08-06 | 湖南大学 | Green preparation method for intermediate of valproic acid derivatives |
| CN104649300B (en) * | 2013-11-19 | 2016-05-04 | 湖南省湘中制药有限公司 | The method of recovery and refining sodium bromide from dipropyl cyanoacetate mixture |
| CN109502874B (en) * | 2018-11-16 | 2021-11-16 | 西北矿冶研究院 | Device and method for strengthening evaporation crystallization of arsenic trioxide |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445304A (en) * | 2008-12-25 | 2009-06-03 | 江苏技术师范学院 | Method for treating wastewater produced by methylation reaction in metribuzin synthesis |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445304A (en) * | 2008-12-25 | 2009-06-03 | 江苏技术师范学院 | Method for treating wastewater produced by methylation reaction in metribuzin synthesis |
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| CN101798121A (en) | 2010-08-11 |
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