Factory Supply Dibenzoyl peroxide powder CAS 94-36-0 Raw Materials

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Uses and synthesis of Dibenzoyl peroxide powder

Dibenzoyl peroxide Raw Materials is a strong oxidizing agent, which can be used to bleach organic materials, such as flour, vegetable oils and fats, etc. However, it has strong destructive effects on β-carotene, vitamin A, vitamin E and vitamin B1 in flour, and the maximum use level is 0.25-0.3g/kg flour; it can be easily decomposed into free radicals when heated up to 70-90℃. Dibenzoyl peroxide powder

Dibenzoyl peroxide powder is widely used as the initiator of polymerization and photochemical reaction of alkene monomer (vinyl chloride, acrylonitrile, etc.), and the excessive dosage will cause the polymer to change color and become yellowish, and at the same time it also has a reducing effect on some pigments.

Dibenzoyl peroxide CAS 94-36-0 can decompose rapidly when heated to about 100℃, and can cause explosion in sealed container, it should be treated as dangerous goods.Dibenzoyl peroxide Raw Materials is sensitive to impact and friction, and the danger of explosion is very big, it should avoid contact with metallic powder, activated carbon and reducing agent. Dibenzoyl peroxide Raw Materials is sensitive to impact and friction, and has a high risk of explosion. To prevent fire or explosion, dilute benzoyl peroxide to about 20% with three or more substances such as calcium carbonate, calcium phosphate, calcium sulfate, magnesium carbonate, alum, starch, etc. (dilute benzoyl peroxide).

Applications / Functions of Dibenzoyl peroxide powder

1. Dibenzoyl peroxide Raw Materials is used as initiator of monomer polymerization of polyvinyl chloride, unsaturated polyester, polyacrylate, etc. It can also be used as cross-linking agent of polyethylene, and as vulcanizing agent of rubber.
2. Dibenzoyl peroxide powder is used as analytical reagent, oxidizing agent, bleaching agent and initiator of plastic polymerization.
3. Dibenzoyl peroxide powder is used as curing agent for unsaturated polyester resin.
4. Dibenzoyl peroxide CAS 94-36-0 Wheat flour whitening agent; Oxidizing agent; Bleaching agent.
5. Dibenzoyl peroxide Raw Materials is mainly used as the polymerization initiator of PVC, polyacrylonitrile and the crosslinking agent of unsaturated polyester and acrylate. It is used as cross-linking agent of silicone rubber and fluorine rubber in rubber industry. It can also be used as bleaching agent and oxidizing agent in chemical production.
6. Dibenzoyl peroxide CAS 94-36-0 is used as flour quality improver, with bactericidal effect and strong oxidizing effect, it can bleach flour. It is only used in wheat flour, the maximum use level is 0.06g/kg.
7. Dibenzoyl peroxide Raw Materials is the most widely used initiator in the adhesive industry, used as acrylate, vinyl acetate solvent polymerization, neoprene rubber, natural rubber, SBS and methyl methacrylate graft polymerization. Unsaturated polyester resin curing, organic glass adhesive initiator. It can also be used as vulcanizing agent and cross-linking agent of silicone rubber and fluorine rubber. It can also be used as bleaching agent and oxidizing agent.

Physicochemical Property of Dibenzoyl peroxide powder

Dibenzoyl peroxide Raw Materials White crystal. Soluble in benzene, chloroform, ether. Slightly soluble in ethanol and water.

Dibenzoyl peroxide powder is also known as dibenzoyl peroxide, benzoyl peroxide, Acetoxyl, Acnegel, Benoxyl, Lucidol, Nericur, Xerac, BP5.White rhombohedral crystal or crystalline powder. Slightly benzaldehyde odor. Bitter kernel flavor. Relative molecular mass 242.23. Relative density 1.3440(25℃). Melting point 103～106℃(decompose and explode). Refractive index 1.545. flash point 125℃. Strong oxidizer, easy to burn, easy to explode. Very slightly soluble in water, slightly soluble in methanol, isopropanol, soluble in ethanol (1.2g/100g), acetone (18.5g/100g), chloroform (26.8g/100g), ethyl acetate (14.4g/100g), benzene (18.6g/100g), ether (8.6g/100g). Half-life in solution is 2.1h (85°C), 10h (72°C). Decomposes slowly in alkali solution. Stable at room temperature, easily exploded by friction, impact or heating in dry state. Can be burned by adding sulfuric acid. Because it is a strong oxidizing agent, it can cause skin and mucous membrane inflammation. Mouse oral LD503949mg/kg.Preparation: Take benzoyl chloride as raw material, react with sodium peroxide (or hydrogen peroxide and sodium hydroxide) to get Dibenzoyl peroxide CAS 94-36-0 crude product, and then recrystallize and refine in benzene or acetone. The 50% sodium hydroxide solution should be added first, then hydrogen peroxide, and finally benzoyl chloride should be added at 0-10 ℃, the order should not be reversed.

production methodprocess of Dibenzoyl peroxide powder

• Add 30% hydrogen peroxide into 30% sodium hydroxide solution under cooling condition to produce sodium peroxide solution; then add benzoyl chloride dropwise with stirring at 0~10℃, the high temperature will cause decomposition of hydrogen peroxide and hydrolysis of benzoyl chloride; precipitate benzoyl peroxide produced by the reaction, after cooling, filtration, washing, and recrystallization with 2:1 methanol/chloroform, drying (50~70℃) to get the product, yield more than 85%. 2N2N2N2N2N2N2 peroxide powder can be used for the production of benzoyl peroxide powder. Yield 85% or more. 2NaOH→H2O2+2H2ONa2O2+2C6H5COCl→C6H5COOOOC6H5+2NaCl
• It is obtained by reacting hydrogen peroxide with 30% liquid alkali to produce sodium peroxide solution and then reacting with benzoyl chloride. The reaction is carried out at about 0 ℃, the temperature is too high to cause the decomposition of hydrogen peroxide, benzoyl chloride is also easy to hydrolyze to generate benzoic acid and affect the yield. The benzoyl peroxide precipitated from the product is filtered, washed and dried to obtain the finished product. The content of industrial benzoyl peroxide can be up to 99% (second grade), the melting point of 102-106 ℃ raw material consumption quota: benzoyl chloride (more than 95%) 1000kg / t, hydrogen peroxide (30%) 800kg / t. Need to be purified, can be used in alcohols, acetone, benzene and other suitable solvents for recrystallization.
• Dibenzoyl peroxide CAS 94-36-0 is obtained by reacting hydrogen peroxide with 30% liquid alkali to produce sodium peroxide solution, and then reacting with benzoyl chloride.

The reaction is carried out at about 0 ℃, the temperature is too high to cause the decomposition of hydrogen peroxide, benzoyl chloride is also easy to decompose to generate benzoic acid and affect the yield. The precipitated benzoyl peroxide is filtered, washed and dried to obtain the finished product. The content of industrial benzoyl peroxide can be up to 99% (second grade), melting point 102～106℃. When it needs to be purified, it can be recrystallized with alcohol, acetone, benzene and other suitable solvents.

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