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Method for treating waste water containing isobutyrate by halogenated alkyl esterification method
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A technology of isobutyrate and haloalkane, which is applied in the field of haloalkane esterification to treat isobutyrate-containing wastewater, can solve the problems of difficult methods, no alcohol ester dodecaisobutyrate metal salt wastewater treatment method, etc., and achieves easy Separation, low solubility effect
Inactive Publication Date: 2018-04-06
ZHEJIANG UNIV
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Problems solved by technology
For the treatment of isobutyric acidwastewater with a strong odor and a wide concentration range, this method is difficult
[0006] At present, no treatment method has been found for the wastewater containing metal isobutyrate produced in the production process of alcohol ester twelve
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Embodiment 1
[0037] Embodiment 1, a kind of halogenated alkyl esterification method is processed the method containing isobutyrate waste water, carries out following steps successively:
[0038] 1), the barium isobutyrate wastewater 105g (isobutyrate 0.44mol) that mass fraction is 64%, 45g methyl chloride (0.88mol), the Na 2 CO 3 23g (0.22mol) was added into the autoclave, after the addition was completed, the autoclave was closed, and the temperature was raised to 100°C with stirring, and the pressure was raised to 2.2MPa. As the reaction proceeds, the pressure continues to drop. After 4 hours, the pressure dropped to 1.9 MPa and remained constant, and the temperature was lowered to stop the reaction.
[0039] That is, the molar ratio of isobutyrate to methyl chloride is 1:2; the molar ratio of isobutyrate to acid-binding agent is 1:0.5.
[0040] 2), after the autoclave is lowered to room temperature, the pressure is released, and the reaction solution is poured out. The reaction solu...
Embodiment 2
[0041] Embodiment 2, a kind of halogenated alkyl esterification method is processed the method that contains isobutyrate waste water, carries out following steps successively:
[0042] 1), the barium isobutyrate waste water 105g (isobutyrate 0.44mol) that mass fraction is 64%, 45g 1,2-dichloroethane (0.44mol), the Na 2 CO 3 23g (0.22mol) was added into the autoclave, after the addition was completed, the autoclave was closed, and the temperature was raised to 110°C with stirring, and the pressure was raised to 2.0MPa. As the reaction proceeds, the pressure continues to drop. After 5 hours, the pressure dropped to 1.8MPa and remained constant, and the temperature was lowered to stop the reaction.
[0043] That is, the molar ratio of isobutyrate to 1,2-dichloroethane is 1:1; the molar ratio of isobutyrate to acid-binding agent is 1:0.5.
[0044] 2), after the autoclave is lowered to room temperature, the pressure is released, and the reaction solution is poured out. The reac...
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Abstract
The invention discloses a method for treating isobutyrate containing waste water through an alkylhalide esterification method. The method comprises the following steps that 1, the isobutyrate containing waste water, an acid-binding agent and alkylhalide are mixed, and isobutyrate in the waste water and alkylhalide are subjected to a nucleophilic substitution to generate ester at the temperature of 80 DEG C to 120 DEG C and the pressure of 2 Mpa to 3 Mpa under the action of the acid-binding agent, along with the reaction, the pressure is reduced, and after the pressure stops being reduced, the reaction is stopped; 2, the reaction solution obtained in the step1 is separated, an oil phase and a water phase are obtained, butyrate as a product and alcohol as a by-product are obtained after the oil phase is rectified, and the water phase is low-COD waste water. The waste water treated through the method is low in COD.
Description
technical field [0001] The invention relates to a method for treating waste water produced in an alcohol ester twelve synthesis process, in particular to a method for treating waste water containing isobutyrate by haloalkyl esterification. Background technique [0002] Alcohol ester twelve is an excellent film-forming aid. During the production of alcohol ester twelve, waste water containing metal isobutyrate will be produced. Since the catalyst used in the production is an alkali containing calcium or barium, the wastewater mainly contains calcium isobutyrate, barium isobutyrate, or a mixture of the two. [0003] The existing carboxylate-containing wastewater treatment methods mainly contain the following: [0004] One is to use the report of patent CN105016415A to acidify carboxylate into organic carboxylic acid with acidifying agent (dilute sulfuric acid, dilute hydrochloric acid, etc.), and then use organic solvent to extract, and part of the organic carboxylic acid ca...
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