It is understood that decabromodiphenylethane is a broad-spectrum additive flame retardant that is widely used, with a relative molecular mass of 971.31. It is white or light yellow powder. Slightly soluble in water, alcohol and ether. Melting point 357℃. The theoretical bromine content is 82.3%. It has high bromine content, good thermal stability, good UV resistance, and lower bleeding than other brominated flame retardants; it is especially suitable for flame retardant of high-end materials used in the production of computers, fax machines, telephones, copiers, home appliances, etc.
The industrial production process of decabromodiphenylethane is as follows:
Add 330kg~114.5kg of bromine catalyst into the wave chemical reaction kettle, Bring the temperature of the reaction system to about 25°C. At this temperature, slowly add 15kg of phenethane heated to a molten state with steam, and control the dripping speed to prevent bumping and spraying.
After the dropwise addition, gradually increase the temperature of the reaction system to 58C, and control it at around 58-60’12 for 6-7h.
After the reaction is completed, transfer all materials in the reaction kettle to the distillation kettle, add water, and heat for evaporation.
After removing excess acetate, the final product is cooled, filtered, and washed with water until neutral. Add a post-treatment agent and perform ball milling for 8 hours. After reaching the required whiteness, perform filter press, drying, and post-heat treatment. , jet mill and other post-processing processes to obtain a stable product of 10 Australian diphenyl ethane.
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