Reaction kettle pressure relief auxiliary device for p-chlorobenzyl chloride production

Abstract

The invention discloses a reaction kettle pressure relief auxiliary device for p-chlorobenzyl chloride production, and relates to the technical field of chemical production. The reaction kettle pressure relief auxiliary device for p-chlorobenzyl chloride production comprises a mounting frame, a penetrating pipe is arranged at the bottom of the mounting frame, a device shell is arranged at the top of the mounting frame, a main electric control valve is arranged in an inner cavity of the device shell, and the control end of the main electric control valve penetrates through the left side of the device shell and is arranged outside the shell. According to the reaction kettle pressure relief auxiliary device for p-chlorobenzyl chloride production, two air outlet structures are additionally arranged on the reaction kettle, air pressure inside and outside the reaction kettle is balanced before the reaction kettle is opened, the opening difficulty of an operator is reduced, meanwhile, a circuit system of the whole device is simple and exists independently, the manufacturing cost is relatively low, and the existing reaction kettle can be improved, so that the waste of the existing reaction kettle is avoided, and the improvement cost is saved to a great extent.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a pressure relief auxiliary device for a reaction kettle used in the production of p-chlorobenzyl chloride. Background technique [0002] p-Chlorobenzyl chloride is needle-like crystal, with a melting point of 29°C and a boiling point of 222°C (decomposes at 214°C). The flash point is 97°C. Sublimable, soluble in ether, acetic acid, carbon disulfide and benzene, and easily soluble in cold ethanol. The freezing point is 31°C, and the relative density is 1.270-1.280. Soluble in ethanol, ether and acetone, insoluble in water, it is a raw material for organic synthesis, and can be used to produce p-chlorobenzyl alcohol, p-chlorobenzaldehyde, p-chlorophenylacetonitrile, p-chlorobenzoic acid, etc. It is used in the pharmaceutical industry to make pyrimethamine, etc. In addition, it is also used in the dye industry. [0003] In the prior art, p-chlorobenzyl is obtained b...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the invention provides a reaction kettle pressure relief auxiliary device for the production of p-chlorobenzyl, which solves the problem that in the prior art, p-chlorobenzyl is composed of p-chlorotoluene and liquid chlorine with catalyst azo The catalyst is obtained after the reaction, and there will be a huge pressure difference inside and outside the reactor after the reaction. If the reactor is opened directly without any operation, the internal substances will be ejected. The existing operation is to use manual and gradual opening to react The opening of the kettle, but this operation will still bring a series of safety problems, and the technical requirements for the operator are relatively high, which will increase the cost and bring inconvenience to the user.

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