Industrial method for purifying tert-butyl peroxybenzoate

Abstract

The invention discloses an industrial method for purifying tert-butyl peroxybenzoate. The industrial method comprises the following steps: S1, adding tert-butyl hydroperoxide and an active agent into a reaction kettle with a temperature of 15-25 DEG C, conducting stirring, pouring a sodium hydroxide solution into the reaction kettle, performing mixing and stirring to obtain a first mixed solution, and extracting the first mixed solution to separate out sodium salt so as to obtain the sodium salt and a filtrate, wherein an extraction solution is ethanol; S2, adding purified water with a temperature of -3 DEG C into the sodium salt, and conducting slow stirring to obtain a pasty mixture; S3, adding a catalyst into benzoyl chloride, conducting stirring to obtain a second mixed solution, dropwise adding the second mixed solution into the pasty mixture through a condensation pipe, and performing stirring to obtain a crude tert-butyl peroxybenzoate product; and S4, washing and separating the tert-butyl peroxybenzoate crude product with sodium carbonate, conducting washing once with a magnesium sulfate solution, and performing drying to obtain the tert-butyl peroxybenzoate. In the preparation of tert-butyl peroxybenzoate in the invention, the content of tert-butyl hydroperoxide is reduced, and the reaction of tert-butyl hydroperoxide and sodium hydroxide is accelerated.

Description

technical field [0001] The invention relates to the technical field of tert-butyl perbenzoate, in particular to an industrial method for purifying tert-butyl perbenzoate. Background technique [0002] Tert-butyl peroxybenzoate is an organic compound with molecular formula C11H14O3, colorless to slightly yellowish liquid. Slightly aromatic. Insoluble in water, soluble in organic solvents. Tert-butyl peroxybenzoate is widely used as an initiator in the polymerization of ethylene, styrene, propylene, vinyl acetate, diallyl phthalate and isobutylene. In the curing process of unsaturated polyester, it is widely used in molding processes such as SMC, BMC, DMC, etc. At the same time, it can also be used in two-component curing systems with higher activity such as MEPK, BPO or TBPO. . Store in a cool, ventilated warehouse. Keep away from fire, heat sources and direct sunlight. Storage temperature should not exceed 30°C. The package is sealed. It should be stored separately f...

AI Technical Summary

Problems solved by technology

[0003] And make in the tert-butyl peroxybenzoate again, there are many impurities and the conversion rate is low, in the preparation of tert-butyl peroxybenzoate, if the tert-butyl hydroperoxide consumption is too much, the tert-butyl peroxide of impurity can be caused Too much hydrogen, in the final purification, repeated washing is required, and during the reaction, the temperature affects the conversion rate

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