Chlorination reactor for preparing 1,1,1,2,3-pentachloropropane

Abstract

A chlorination reactor for preparing 1,1,1,2,3-pentachloropropane comprises a dechloridation reaction device and a chlorination reaction device; the dechlorination reaction device comprises a reaction barrel body A, the inner wall of the reaction barrel body A is provided with a heating layer and a catalyst layer, and the reaction barrel body A is also provided with a temperature measuring device; the chlorination reaction device comprises a reaction barrel body B, the reaction barrel body B is internally provided with a cooling layer, a catalyst filling layer and a temperature measuring device, and the bottom part of the reaction barrel body B is provided with a chlorine feeding port; the top parts of the dechlorination reaction device and the chlorination reaction device are communicated by a pipeline, the pipeline is provided with an exhaust gas discharge port, the bottom parts of the dechlorination reaction device and the chlorination reaction device are communicated by a circulating device, and the circulating device and the reaction barrel body A are respectively communicated with a material input and output port through a valve; chlorine enters from an chlorine inlet of the chlorination reaction device and is subjected to a reaction with chlorinated olefin in the chlorination reaction device to generate the target product, and the un-reacted chlorinated olefin material in the chlorination reaction device and the target product go into the dechlorination reaction device. The reaction is easy to control, and the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a chlorination reactor, in particular to a chlorination reactor for preparing 1,1,1,2,3-pentachloropropane by using 1,1,1,3-tetrachloropropane as a raw material. Background technique [0002] Chlorination reactions can be roughly divided into photochlorination, thermal chlorination and catalytic chlorination. Different reactants need to be chlorinated in different ways and generally in different reactors. The characteristic of catalytic chlorination is that the reaction temperature is relatively low, generally 60-120°C, and the reaction exotherm is large. The patent No. is [200920308946.9], and the patent titled "bottom jet reactor" discloses a reactor. During the chlorination process of choline, heat is removed by adding a stirring device in the reactor. Patent documents [EP131560] and [201110088545.9] both reported the process of using tetrachloropropane as raw material, activated carbon supported ferric chloride or iron me...

AI Technical Summary

Problems solved by technology

The chlorination reaction process is actually divided into two steps, the first step is an endothermic reaction, the second step is an exothermic reaction, and the second step is generally a strong exothermic reaction. Under the conditions of two-step reaction, the intermediates tend to polymerize to form high polymers, which generate a large amount of impurities and affect the yield of the product.

Images