Method for producing compound plasticizer from fumaric acid production wastewater

A technology for the production of waste water and fumaric acid, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylic acid esters, etc., can solve the problems of inability to recycle useful substances, increase the service life and prevent the loss of plasticizers , not easy to aging effect

Inactive Publication Date: 2016-10-05
ZHENJIANG KAIPU CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter what treatment method is used, it is said that the waste water from fumaric acid production is discharged after treatment, and some useful substances in the waste water cannot be recycled.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for producing composite plasticizers from waste water produced by fumaric acid, comprising the following steps:

[0020] ① Pretreatment: After evaporating, crystallizing and rectifying the fumaric acid production wastewater, stripping to remove acid, then centrifuging and drying the obtained solution to obtain organic acid powder;

[0021] ②Esterification reaction: Take 100 parts of organic acid powder prepared in step 1) and place it in a monoesterification reaction kettle, then add 150 parts of octanol, heat to 130-150°C for 8-10 hours, and the organic acid The weight ratio of acid powder and alcohols is 1: 1.5;

[0022] Then transfer the material to the second esterification reaction kettle, add the catalyst isobutyl orthotitanate, and heat to 230-250°C for 6-8 hours, add steam to remove the catalyst, and then vacuum dehydrate;

[0023] ③ Decolorization: add the decolorizing material diatomite to decolorize, and then remove the decolorizing material through...

Embodiment 2

[0025] A method for producing composite plasticizers from waste water produced by fumaric acid, comprising the following steps:

[0026] ① Pretreatment: After evaporating, crystallizing and rectifying the fumaric acid production wastewater, stripping to remove acid, then centrifuging and drying the obtained solution to obtain organic acid powder;

[0027] ②Esterification reaction: Take 100 parts of the organic acid powder prepared in the step 1) and place it in a monoesterification reaction kettle, then add 200 parts of isobutanol, and heat to 100-120°C for 4-7 hours, wherein The weight ratio of organic acid powder and alcohols is 1:2;

[0028] Then transfer the material to the second esterification reaction kettle, add the catalyst isobutyl orthotitanate, and heat to 200-220°C for 5-7 hours, add steam to remove the catalyst, and then vacuum dehydrate;

[0029] ③ Decolorization: add a mixture of diatomaceous earth and activated carbon to decolorize, and then remove the decolo...

Embodiment 3

[0031] A method for producing composite plasticizers from waste water produced by fumaric acid, comprising the following steps:

[0032] ① Pretreatment: After evaporating, crystallizing and rectifying the fumaric acid production wastewater, stripping to remove acid, then centrifuging and drying the obtained solution to obtain organic acid powder;

[0033] ②Esterification reaction: Take 100 parts of the organic acid powder prepared in the step 1) and place it in a monoesterification reaction kettle, then add 50 parts of dodecyl alcohol, and heat to 110-140°C for 5-9 hours, wherein The weight ratio of organic acid powder and alcohols is 2:1;

[0034] Then transfer the material to the second esterification reaction kettle, add the catalyst isobutyl orthotitanate, and heat to 210-240°C for 5-8 hours, add steam to remove the catalyst, and then vacuum dehydrate;

[0035] ③ Decolorization: add diatomaceous earth as a decolorizing material for decolorization, and then remove the deco...

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PUM

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Abstract

The invention discloses a method for producing a composite plasticizer from waste water from fumaric acid production. Firstly, the waste water from fumaric acid production is evaporated, crystallized and rectified, then stripped to remove acid, and then the obtained solution is centrifuged. and drying to obtain organic acid powder; put the prepared organic acid powder in a monoesterification reactor, add alcohols, heat to 100-150°C for several hours; then transfer the material to the second esterification In the reaction kettle, add the catalyst isobutyl orthotitanate, and heat it to 200-250°C to react for several hours, add steam to remove the catalyst, and then vacuum dehydrate; finally add the decolorization material for decolorization, and the decolorization material is removed by a filter press to obtain the finished product Composite plasticizer. The invention has the advantages that various organic acids in the fumaric acid production wastewater can be recovered and made into plasticizers, realizing the purpose of waste utilization. At the same time, the organic acid content in the fumaric acid production wastewater discharged last is greatly reduced, which is more environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment and recycling, and in particular relates to a method for producing composite plasticizers from fumaric acid production wastewater. Background technique [0002] Fumaric acid, also known as fumaric acid, is an important organic chemical raw material, which is obtained through isomerization of maleic acid, a by-product obtained during the production of phthalic anhydride. During its production process, a large amount of acidic wastewater (hereinafter referred to as fumaric acid production wastewater) will be produced. Among them, there are mainly organic impurities of phthalic acid / benzoic acid / citric acid citric acid and thiourea. The COD content of wastewater is as high as 5×104~20×104. There are many treatment methods, such as advanced oxidation method, iron- Carbon micro-electrolysis, ion resin exchange, reverse osmosis membrane, etc. However, no matter what treatment m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/11C08K5/12C08K5/101C07C67/08C07C69/80C07C69/78C07C69/704
Inventor 曹芹孙楠鲁春王有喜
Owner ZHENJIANG KAIPU CHEM TECH CO LTD
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