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Harmless treatment method of epoxidized wastewater

A harmless treatment and wastewater treatment technology, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve problems that have not yet been directly decomposed, achieve harmless treatment, simple process, Achieve the effect of industrialization

Active Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the epoxidation wastewater containing 3-chloro-1,2-propanediol and 3-chloropropene and hydrogen peroxide epoxidation to synthesize epichlorohydrin, there is no direct decomposition of 3-chloro- Published reports on 1,2-propanediol and 3-chloropropanediol monomethyl ether

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a 350mL stirring autoclave, add 300.00g of 3-chloro-1,2-propanediol content of epoxidation waste water of 0.24% by mass and 8.43g of sodium hydroxide aqueous solution of 30% by mass, at 100 °C and 0.1 MPa, stirring and mixing for 1 hour, 100.00% of 3-chloro-1,2-propanediol was converted into glycerin.

Embodiment 2

[0024] Adopt the same method as Example 1 to treat the epoxidation wastewater, the difference is that the content of 3-chloro-1,2-propanediol in the epoxidation wastewater is 0.49% by mass, and the content of propylene glycol monomethyl ether is 0.89% by mass. The amount of sodium hydroxide aqueous solution is 12.18g, and the wastewater treatment temperature is 80°C. The treatment result of epoxidation wastewater is that 100.00% of 3-chloro-1,2-propanediol is converted into glycerin, and 100.00% of 3-chloropropanediol monomethyl ether is converted into glycerol monomethyl ether.

Embodiment 3

[0026] Adopt the same method as Example 1 to treat the epoxidation wastewater, the difference is that the content of 3-chloro-1,2-propanediol in the epoxidation wastewater is 0.92% by mass, and the content of propylene glycol monomethyl ether is 1.51% by mass. 10.28 g of an alkaline aqueous solution having a potassium hydroxide content of 50% by mass was added, and the wastewater treatment temperature was 70°C. The treatment result of epoxidation wastewater is that 100.00% of 3-chloro-1,2-propanediol is converted into glycerin, and 100.00% of 3-chloropropanediol monomethyl ether is converted into glycerol monomethyl ether.

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PUM

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Abstract

A harmless treatment method of epoxidized wastewater comprises: a) mixing epoxidized wastewater from epichlorohydrin synthesized by epoxidizing 3-chloropropene and hydrogen perioxide, and alkaline water solution in a wastewater treatment reactor, so that 3-chloro-1,2-propanediol therein is converted into glycerol; b) optionally, neutralizing the reaction mixture of the step a). By using the method of the invention, it is possible to conveniently convert toxic and harmful epoxidized wastewater, produced in the synthesis of epichlorohydrin from epoxidizing of 3-chloropropene and hydrogen perioxide, into nontoxic and harmless wastewater.

Description

technical field [0001] The invention relates to a method for harmless treatment of epoxidized wastewater, more specifically, to a method for harmless treatment of wastewater produced by epoxidation reaction of 3-chloropropene and hydrogen peroxide to synthesize epichlorohydrin. Background technique [0002] Hydrogen peroxide is a green oxidizing agent, as disclosed in USP4833260, in the presence of titanium silicon molecular sieve catalyst and solvent methanol, through the epoxidation reaction of 3-chloropropene and hydrogen peroxide, epoxy chlorine can be efficiently and cleanly synthesized propane. Epichlorohydrin is an important basic organic chemical raw material and intermediate, widely used in the synthesis of various industrial products such as epoxy resin, chlorohydrin rubber, pharmaceuticals, pesticides, surfactants and plasticizers. [0003] CN101747296A and CN101747297A disclose the method for producing epichlorohydrin by the epoxidation reaction of 3-chloroprope...

Claims

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Application Information

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IPC IPC(8): C02F1/58C02F9/04
CPCC02F1/58C02F9/00C02F2101/36C02F2103/36C02F2301/08
Inventor 张永强刘易杜泽学
Owner CHINA PETROLEUM & CHEM CORP
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