Method for treating isobutyrate-containing wastewater by alcohol etherification

A technology of esterification of isobutyrate and alcohol, which is applied in chemical instruments and methods, natural water treatment, preparation of organic compounds, etc., can solve the problem of difficult methods, and no alcohol ester isobutyric acid metal salt wastewater treatment method has been found. and other problems, to achieve the effect of easy separation and low solubility

Active Publication Date: 2016-06-29
宁波永顺精细化工有限公司
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Problems solved by technology

For the treatment of isobutyric acid wastewater 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

Method used

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  • Method for treating isobutyrate-containing wastewater by alcohol etherification
  • Method for treating isobutyrate-containing wastewater by alcohol etherification
  • Method for treating isobutyrate-containing wastewater by alcohol etherification

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Embodiment 1

[0033] Embodiment 1, a kind of method that alcohol esterification process contains isobutyrate waste water, carry out following steps successively:

[0034] 1), 273g barium isobutyrate mass fraction is 64% waste water (isobutyrate radical 1.12mol), 62g concentrated sulfuric acid (0.62mol), 166g isobutanol (2.24mol) is added in the flask. Heat up to reflux under stirring, the azeotropic temperature of isobutanol and water is about 90°C, and the temperature of the reaction system in the flask is controlled at 90-107°C. During the reaction process, the water in the reaction system was continuously separated, and when no water was separated, the reaction was stopped, and a total of 92 g of water was separated.

[0035] That is, the molar ratio of isobutyrate to isobutanol is 1:2; the molar ratio of isobutyrate to concentrated sulfuric acid is 1:0.55.

[0036] 2), after the reaction solution obtained in step 1) was cooled to room temperature, 92 g of separated water was poured bac...

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Abstract

The invention discloses a method for treating isobutyrate-containing wastewater by alcohol etherification, comprising the following steps: 1), acidifying isobutyrate-containing wastewater with concentrated sulfuric acid, adding alcohol, subjecting a reaction system to etherification under reflux condition so as to generate isobutyrate, and stopping reacting until no water is generated in the reaction system; 2), cooling reaction liquid obtained in step 1) to room temperature, re-adding water separated from the reaction system and obtained in step 1), into the cooled reaction liquid, and stirring and standing to obtain oil phase and water phase; subjecting the water phase to solid-liquid separation to obtain low-COD wastewater and sulfate; 3), rectifying the oil phase obtained in step 2); collecting an alcohol fraction and an isobutyrate fraction. The wastewater treated by the method has low COD value.

Description

technical field [0001] The invention relates to a waste water treatment method, in particular to a waste water treatment method produced in the synthesis process of alcohol ester twelve. 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 can be recovered. The problem with this method is that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/24C02F9/04C02F101/34C02F103/36
CPCC02F9/00C02F2101/34C02F2103/36C07C67/08C07C69/24
Inventor 陈新发张恒韦隆武张小莲王春阁
Owner 宁波永顺精细化工有限公司
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