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Treatment method of pasty diacyl peroxide

A treatment method, diacyl technology, applied in chemical instruments and methods, preparation of organic compounds, alkali metal chlorides, etc., can solve problems such as high risk

Pending Publication Date: 2021-05-28
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

The above treatment methods can effectively treat the contaminated diacyl peroxide waste, but the raw material (hydrazine hydrate) used is a flammable and explosive strong reducing agent, and the risk is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] With 600kg water, 43kg sodium hydroxide solution (32wt%, 0.344kmol), 6kg sodium dodecylbenzenesulfonate aqueous solution (2wt%), 120kg pasty two (2,4-dichlorobenzoyl) waste materials (that is, containing 0.142kmol bis(2,4-dichlorobenzoyl) peroxide) is added in the 1000L reactor, after mixing uniformly, the mixed material (the mass content of sodium dodecylbenzenesulfonate in the mixed material 0.018%, the mass content of sodium hydroxide in the mixed material is 2.1%);

[0050] Turn on the high-speed shearing and dispersing equipment (rotating speed is 3000rpm), shear, use the jacket to raise the temperature, and when the temperature reaches 75°C, carry out the oxidation-reduction reaction, control the reaction temperature to 80°C, keep it warm for 5h, and then turn on the cooling water in the reaction kettle Lower the temperature and cool to 20°C to obtain the product material;

[0051] The product material is sent to a centrifuge for the first separation (centrifugal...

Embodiment 2

[0055] Add 600kg of water, 39kg of 32wt% sodium hydroxide solution, 6kg of sodium dodecylbenzenesulfonate aqueous solution (2wt%), and 120kg of pasty bis(2,4-dichlorobenzoyl) waste into a 1000L reactor In, after mixing evenly, obtain mixed material (the mass content of sodium dodecylbenzenesulfonate in mixed material is 0.018%, the mass content of sodium hydroxide in mixed material is 1.9%);

[0056] Turn on the high-speed shearing and dispersing equipment, shear (the speed is 3500rpm), and use a jacket to raise the temperature. When the temperature reaches 75°C, the oxidation-reduction reaction is carried out. Lower the temperature and cool to 20°C to obtain the product material;

[0057] The product material is sent to a centrifuge for the first separation (centrifugal speed is 1000rpm, centrifugation time is 10min), and the insoluble matter and the first filtrate are obtained, and the content of bis-2-4 in the insoluble matter is 0%, and the reaction is complete;

[0058] ...

Embodiment 3

[0061] Add 600kg of water, 36kg of 32wt% sodium hydroxide solution, 6kg of sodium dodecylbenzenesulfonate aqueous solution (2wt%), and 120kg of pasty bis(2,4-dichlorobenzoyl) waste into a 1000L reactor In, after mixing evenly, obtain the mixed material (the mass content of sodium dodecylbenzenesulfonate in the mixed material is 0.018%, and the mass content of sodium hydroxide in the mixed material is 1.79%);

[0062] Turn on the high-speed shearing and dispersing equipment (rotation speed is 4000rpm), shear, use the jacket to raise the temperature, when the temperature reaches 75°C, carry out the redox reaction, control the reaction temperature to 80°C, keep it warm for 5h, and then turn on the cooling water in the reactor Lower the temperature and cool to 20°C to obtain the product material;

[0063] The product material is sent to a centrifuge for the first separation (centrifugal speed is 1000rpm, centrifugation time is 10min), and the insoluble matter and the first filtrat...

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Abstract

The invention provides a treatment method of pasty diacyl peroxide, and belongs to the technical field of organic peroxide preparation. According to the method, the bis(2, 4-dichlorobenzoyl) peroxide in the bis(2, 4-dichlorobenzoyl) peroxide waste is treated through the oxidation-reduction reaction of the bis(2, 4-dichlorobenzoyl) peroxide waste and sodium hydroxide, meanwhile, the dispersion effect of materials in the oxidation-reduction reaction process is enhanced through the surfactant, the reaction specific surface is increased, and the treatment efficiency is improved; and full dispersion of the pasty peroxide bis(2, 4-dichlorobenzoyl) waste is achieved through shearing dispersion, pasty bis(2, 4-dichlorobenzoyl) which has no utilization value or is seriously polluted can be treated, the treatment means is mild, the risk is low, the treatment effect is good, generation of solid waste can be remarkably reduced, environmental pollution is reduced, and the method is a recycling and harmless treatment mode.

Description

technical field [0001] The invention relates to the technical field of organic peroxide preparation, in particular to a treatment method of pasty diacyl peroxides. Background technique [0002] Bis(2,4-dichlorobenzoyl) peroxide (hereinafter referred to as bis-2-4) is a diacyl peroxide, which is a paste solid and is often used as a vulcanizing agent. The strength of the product obtained by using bis-2-4 High, good transparency. In the production process of silicone pressure-sensitive adhesives, double 24 is widely used as a cross-linking agent, but it needs to be dissolved before being put into use during use. As a paste-like solid, Shuang24 dissolves slowly in a solvent, takes a long time and has the problem of incomplete dissolution. In addition, in the preparation process of bis-diquat or PMBP (bis(4-methylbenzoyl peroxide)), if it is polluted during the kneading process, it is difficult to find and separate impurities from the material, which is harmful to Subsequent p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/23C07C51/285C07C51/02C07C63/70C01D3/06
CPCC07C51/285C07C51/23C07C51/02C01D3/06C07C63/70
Inventor 顾屹立陈丹唐明亮
Owner 常熟市滨江化工有限公司
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