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Treatment method of dibenzoyl peroxide wastewater

A technology of dibenzoyl peroxide wastewater and its treatment method, which is applied in the field of water treatment, can solve problems such as complex treatment methods, and achieve the effects of simple operation and environmental protection

Inactive Publication Date: 2018-09-21
常熟市滨江化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] It can be seen that this method needs to add a reducing agent, which is easy to introduce impurities, and the subsequent treatment methods such as vacuum distillation and biochemical treatment are complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Dibenzoyl peroxide wastewater (comprising mother liquor and washing wastewater of dibenzoyl peroxide) is filtered by a filter bag with a pore size of 50 μm, and a total of 1000 kg of filtered dibenzoyl peroxide wastewater is put into a storage tank , the mass concentration of sodium benzoate in the described dibenzoyl peroxide wastewater is 3.2%, the mass concentration of sodium peroxybenzoate is 0.01%, the mass concentration of hydrogen peroxide is 0.1%, and the mass concentration of sodium hydroxide is 0.3% , the mass concentration of sodium chloride is 18%;

[0051] Heat the dibenzoyl peroxide wastewater to 70°C and keep it warm for 1h;

[0052] Add hydrochloric acid with a mass concentration of 32% to the obtained waste water to adjust the pH to 1.5, and conduct acid analysis at a temperature of 5°C;

[0053] The obtained material is subjected to the first centrifugation (centrifugal speed is 1000rpm, centrifugation time is 10min), the solid material obtained is wa...

Embodiment 2

[0055] Dibenzoyl peroxide wastewater (comprising mother liquor and washing wastewater of dibenzoyl peroxide) is filtered by a filter bag with a pore size of 50 μm, and a total of 1000 kg of filtered dibenzoyl peroxide wastewater is put into a storage tank , the mass concentration of sodium benzoate in the described dibenzoyl peroxide wastewater is 1.1%, the mass concentration of sodium peroxybenzoate is 0.05%, the mass concentration of hydrogen peroxide is 0.5%, and the mass concentration of sodium hydroxide is 0.7% , the mass concentration of sodium chloride is 15%;

[0056] Heat the dibenzoyl peroxide wastewater to 75°C and keep it warm for 0.8h;

[0057] Add hydrochloric acid with a mass concentration of 25% to the obtained waste water to adjust the pH to 1.4, and conduct acid analysis at a temperature of 10°C;

[0058] The gained material is subjected to the first centrifugation (centrifugal speed is 1500rpm, centrifugation time is 7min), the solid material obtained is wa...

Embodiment 3

[0060] Dibenzoyl peroxide wastewater (comprising mother liquor and washing wastewater of dibenzoyl peroxide) is filtered by a filter bag with a pore size of 50 μm, and a total of 1000 kg of filtered dibenzoyl peroxide wastewater is put into a storage tank , the mass concentration of sodium benzoate in the described dibenzoyl peroxide wastewater is 4.5%, the mass concentration of sodium peroxybenzoate is 0.03%, the mass concentration of hydrogen peroxide is 0.3%, and the mass concentration of sodium hydroxide is 0.8% , the mass concentration of sodium chloride is 20%;

[0061] Heat the dibenzoyl peroxide wastewater to 80°C and keep it warm for 0.5h;

[0062] Add hydrochloric acid with a mass concentration of 20% to the obtained waste water to adjust the pH to 1.4, and conduct acid analysis at a temperature of 25°C;

[0063] The obtained material is subjected to the first centrifugation (centrifugal speed is 2000rpm, centrifugation time is 5min), the solid material obtained is ...

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Abstract

The invention provides a treatment method of dibenzoyl peroxide wastewater. The treatment method comprises the following steps: carrying out heating treatment on the dibenzoyl peroxide wastewater; regulating the pH (Potential of Hydrogen) value of the obtained wastewater to be less than or equal to 2 by utilizing hydrochloric acid and then carrying out acidification; carrying out first solid-liquid separation on an obtained material, wherein an obtained solid material is benzoic acid; regulating the pH value of an obtained liquid material to be 5 to 7 by utilizing a sodium hydroxide solution;carrying out concentration and second solid-liquid separation in sequence, wherein an obtained solid material is sodium chloride. According to the treatment method provided by the invention, other impurity ions are not introduced and the operation is simple; in a treatment process, other wastewater is not generated; the treatment pressure of a wastewater treatment system is greatly alleviated andthe treatment cost is reduced; the environment protection is facilitated.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for treating dibenzoyl peroxide wastewater. Background technique [0002] Dibenzoyl peroxide, also known as benzoyl peroxide, commonly known as initiator BPO. Dibenzoyl peroxide is white crystal powder at room temperature, slightly smells of bitter almond, soluble in benzene, chloroform, ether, slightly soluble in ethanol and water; can be used as polyvinyl chloride, unsaturated polyester, polyacrylic acid Monomer polymerization initiators such as esters, can also be used as a crosslinking agent for polyethylene, and can also be used as a rubber vulcanizing agent. [0003] With the development of industry, dibenzoyl peroxide is more and more widely used in production, and the demand is also increasing. At present, the method for producing dibenzoyl peroxide is mainly to add hydrogen peroxide to sodium hydroxide solution under cooling conditions to generate aque...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D3/06C07C51/02C07C51/42C07C63/06C02F101/10C02F101/12C02F101/34C02F103/36
CPCC02F9/00C01D3/06C02F1/02C02F1/38C02F1/52C02F1/66C02F2101/10C02F2101/12C02F2101/34C02F2103/36C07C51/02C07C51/42C07C63/06
Inventor 顾屹立陈丹唐明亮
Owner 常熟市滨江化工有限公司