A catalyst for treating esterification wastewater

A catalyst and waste water technology, applied in the direction of physical/chemical process catalyst, catalyst activation/preparation, organic compound/hydride/coordination complex catalyst, etc., can solve problems such as small molecular weight, high COD value, and unsatisfactory needs

Active Publication Date: 2019-08-23
BINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Esterification wastewater is wastewater generated during the esterification reaction between organic alcohols and organic acids (or inorganic acids). Since the esterification process is reversible and the reaction is extremely slow, concentrated sulfuric acid is often used as a catalyst, so the pH of the wastewater is low. The acidity is strong, and the wastewater contains diethylene glycol, acetaldehyde, ethylene glycol, 2-methyl-1,3-dioxolane, terephthalic acid and other organic substances, resulting in complex components of esterification wastewater and relative pollution Small molecular weight, containing benzene ring structure, difficult to biodegrade, high COD value, difficult to handle
With the improvement of the allowable discharge standard of industrial wastewater, higher requirements are put forward for the treatment of esterification wastewater. However, the existing catalysts for the treatment of esterification wastewater cannot meet the needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A catalyst for treating wastewater from esterification reaction, comprising the following raw materials in parts by weight, 200 parts of fluorspar, 50 parts of sodium hydroxide, 10 parts of dodecyl dimethyl benzyl ammonium chloride, and 30 parts of praseodymium chloride , 5 parts of o-phenylphenol, 15 parts of lanthanum chloride, 10 parts of ethanol, 1 part of crosslinking agent;

[0015] A method for preparing a catalyst for treating esterification wastewater, (1) Dissolving sodium hydroxide in water, adding fluorspar to the sodium hydroxide solution and soaking at room temperature for 12 hours, and then ultrasonicating at 35°C for 15 minutes to obtain A ; (2) Add dodecyldimethylbenzyl ammonium chloride to A and mix well, and stir the mixture at 55°C for 2 hours to obtain B, (3) Add ethanol, lanthanum chloride, o-phenylphenol, chlorine Mix praseodymium and water evenly, and centrifuge the mixture at 50°C for 3 minutes to obtain C; (4) Mix B and C evenly to obtain a cat...

Embodiment 2

[0023] A catalyst for treating wastewater from esterification reaction, comprising the following raw materials in parts by weight: 300 parts of fluorspar, 60 parts of sodium hydroxide, 20 parts of dodecyl dimethyl benzyl ammonium chloride, and 35 parts of praseodymium chloride , 15 parts of o-phenylphenol, 20 parts of lanthanum chloride, 15 parts of ethanol, 5 parts of crosslinking agent;

[0024] A method for preparing a catalyst for treating esterification wastewater, (1) Dissolving sodium hydroxide in water, adding fluorspar to the sodium hydroxide solution and soaking at room temperature for 20 hours, and then ultrasonicating at 45°C for 25 minutes to obtain A ; (2) Add dodecyldimethylbenzyl ammonium chloride to A and mix well, and stir the mixture at 58°C for 4 hours to obtain B, (3) Add ethanol, lanthanum chloride, o-phenylphenol, chlorine Mix praseodymium and water evenly, and centrifuge the mixture at 55°C for 5 minutes to obtain C; (4) Mix B and C evenly to obtain a c...

Embodiment 3

[0032] A catalyst for treating esterification wastewater, comprising the following raw materials in parts by weight, 250 parts of fluorspar, 55 parts of sodium hydroxide, 15 parts of dodecyl dimethyl benzyl ammonium chloride, and 33 parts of praseodymium chloride , 10 parts of o-phenylphenol, 18 parts of lanthanum chloride, 12 parts of ethanol, 3 parts of crosslinking agent;

[0033] A method for preparing a catalyst for treating esterification wastewater, (1) Dissolving sodium hydroxide in water, adding fluorspar to the sodium hydroxide solution and soaking at room temperature for 15 hours, and then ultrasonicating at 40°C for 20 minutes to obtain A ; (2) Add dodecyldimethylbenzyl ammonium chloride to A and mix thoroughly, and stir the mixture at 57°C for 2-4h to obtain B. (3) Add ethanol, lanthanum chloride, o-phenylphenol, Mix praseodymium chloride and water evenly, and centrifuge the mixture at 52°C for 4 minutes to obtain C; (4) Mix B and C evenly to obtain a catalyst bod...

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Abstract

This application belongs to the field of catalysts, and specifically relates to a catalyst for treating esterification reaction wastewater, including the following raw materials in weight parts: 200-300 parts of fluorspar, 50-60 parts of sodium hydroxide, and dodecyldimethyl chloride. 10-20 parts of benzyl ammonium, 30-35 parts of praseodymium chloride, 5-15 parts of o-phenylphenol, 15-20 parts of lanthanum chloride, 10-15 parts of ethanol, 1-5 parts of cross-linking agent, by this application The prepared catalyst can effectively treat esterification wastewater to meet emission standards.

Description

technical field [0001] The application belongs to the field of catalysts, in particular to a catalyst for treating wastewater from esterification reaction. Background technique [0002] With the rapid development of my country's polyester industry, the esterification wastewater discharged during the production process is also increasing, which poses a great threat to environmental safety. Esterification wastewater is wastewater produced during the esterification reaction between organic alcohols and organic acids (or inorganic acids). Since the esterification reaction process is reversible and the reaction is extremely slow, concentrated sulfuric acid is often used as a catalyst, so the pH of the wastewater is low. The acidity is strong, and the wastewater contains diethylene glycol, acetaldehyde, ethylene glycol, 2-methyl-1,3-dioxolane, terephthalic acid and other organic substances, resulting in complex components of the esterification wastewater and relative pollution. S...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01J31/26B01J35/08B01J37/02B01J37/04B01J37/34C02F1/66C02F1/62C02F103/38
CPCC02F1/62C02F1/66B01J31/26B01J37/009B01J37/0201B01J37/04B01J37/343B01J37/345C02F2103/38B01J35/51
Inventor郑焕强荣琨张再旺
OwnerBINZHOU UNIV