Purifying system and process for 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane

Abstract

The invention discloses a purifying system for 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane. The system comprises a distillation kettle and a decoloring kettle; the distillation kettle is connected with the decoloring kettle through a material conveying pipeline; the distillation kettle comprises a casing; an air inlet pipe is arranged in the casing; the distance between one end of the air inlet pipe and the bottom of the casing is 10 to 200 mm; the other end of the air inlet pipe is connected with the top wall of the casing; the arrangement of the air inlet pipe is favorable to introduce air into liquid to assist the boiling of the liquid; the decoloring kettle is arranged, so that the product quality is improved. The invention further provides a purifying process for the 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane. Distillation is performed under the conditions of 61 to 68 DEG C and -0.093 to 0.098 MPa; the air is introduced into the liquid for distilling; the product is decolored after the distilling is completed; the distilling time is shortened; the purity and the chromaticity of a target product are improved; the energy consumption and material consumption for purifying are reduced.

Description

technical field [0001] The invention relates to the technical field of chemical products, in particular to a purification system and process of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane. Background technique [0002] 2,5-Dimethyl-2,5 bis(tert-butyl peroxy)hexane, also known as 2,5-dimethyl-2,5 bis(tert-butyl peroxy)hexane, commonly known as bis" 2,5" vulcanizing agent is an industrially important peroxide. Its molecular formula is C 16 h 34 o 4 , molecular weight 290.44, density 0.847g / cm 3 , the specific gravity is D (20°C) 0.865, the refractive index is 1.4185, the flash point is: closed 36°C, open 58°C; the alarm temperature is 75°C, the self-accelerating decomposition temperature is 80°C, and the theoretical active oxygen content is 11.02%. A flammable, explosive, odorless, light yellow transparent oily liquid. 2,5-Dimethyl-2,5-bis(tert-butyl peroxide)hexane is often used as a free radical initiator in the polymerization process and to improve the viscosity of p...

AI Technical Summary

Problems solved by technology

[0007] Another technical problem to be solved by the present invention is: the existing purification process adopts vacuum distillation under the condition of 40~60°C and -0.09MPa~-0.1MPa, wherein -0.1MPa cannot be realized for those skilled in the art. Adopt the method of passing into nitrogen distillation, need purification before nitrogen is passed into, increase raw material cost; Under 40~60 ℃, some impurity components in the liquid can not be fully distilled, make final product purity low; Another purpose of the present invention is : Provide a kind of purification process of 2,5-dimethyl-2,5-bis(tert-butyl peroxy)hexane, which adopts 2,5 -Dimethyl-2,5-bis(tert-butylperoxy)hexane is distilled by passing air into the semi-finished product, which solves the problems of high cost of nitrogen feeding, long distillation time and low purity of the target product in the existing process

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