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Method for treating purified and refined waste liquid of long carbon chain dibasic acid

A long-carbon-chain dibasic acid and treatment method technology, which is applied in the field of long-carbon-chain dibasic acid purification and purification waste liquid treatment, can solve the problems of environmental pollution and waste, reduce the content of pollutants, reduce purification costs, The effect of reducing production costs

Inactive Publication Date: 2019-10-08
江苏达成生物科技有限公司
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a treatment method for the purification and purification waste liquid of long carbon chain dibasic acid, which solves the problem of waste and environmental pollution caused by direct discharge of dibasic acid and methanol in the existing dibasic acid production waste liquid

Method used

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] The present invention is a treatment method for purification and purification waste liquid of long carbon chain dibasic acid, comprising the following steps:

[0028] Step 1: Acidifying the waste liquid after purifying and refining the excessively long carbon chain dibasic acid, and adjusting the pH of the treated waste water to 1.0-3.0 with acid;

[0029] Step 2: The treatment solution after step 1 acidification is left to stand, and the treatment solution is left to settle to precipitate dibasic acid;

[0030] Step 3: Separating the product ...

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Abstract

The invention discloses a method for treating purified and refined waste liquid of long carbon chain dibasic acid, and relates to the technical field of treatment of dibasic acid waste liquid. The method comprises the following steps: acidifying waste liquid obtained after purifying and refining the long carbon chain dibasic acid, and adjusting pH of the treated waste water to be 1.0-3.0 by usingacid; leaving the treated solution acidified in the step one standstill, and enabling the treated solution standstill to precipitate out dibasic acid; and separating the product obtained in the step two, and adding an oxidant into the separated supernatant and mixing uniformly. According to the method, the dibasic acid is extracted by treating waste liquid discharged after purification and refining of the long carbon chain dibasic acid, so that the purification and refining rate of the dibasic acid is improved, meanwhile, a large amount of waste is avoided, methanol in the waste liquid is recycled, the production cost is reduced, the waste water is further treated, the content of pollutants in the waste water is reduced, purification and discharge of production waste water are facilitated,and the waste water purification cost is reduced. Environmental damage is reduced.

Description

technical field [0001] The invention belongs to the technical field of dibasic acid waste liquid treatment, and in particular relates to a treatment method for purifying and refining waste liquid of long carbon chain dibasic acid. Background technique [0002] Long carbon chain dibasic acids are mainly used in the synthesis of polymer materials, spices, medicines, etc. Among them, it is one of the most important uses to synthesize long carbon chain nylon (also known as polyamide resin) engineering plastics through polycondensation reaction between polycondensation monomer and diamine. In recent years, the demand for long carbon chain dibasic acids in the international and domestic markets has increased rapidly and has been increasing year by year. Moreover, the requirements for various technical performance indicators of product quality are constantly improving and becoming more and more stringent. [0003] In the prior art, the purification method of long-carbon-chain dib...

Claims

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Application Information

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IPC IPC(8): C07C51/42C07C55/02C07C57/00C07C29/74C07C31/04
CPCC07C51/42C07C55/02C07C29/74C07C57/00C07C31/04
Inventor 郑孟国李兰
Owner 江苏达成生物科技有限公司
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