Chlorohydrination reaction device for producing epoxide by using chlorohydrination method, and use method thereof

Abstract

The invention discloses a chlorohydrination reaction device for producing an epoxide by using a chlorohydrination method, and a use method thereof, and relates to chemical industry equipment and a process. According to the epoxide, by arranging a chlorohydrination reactor and an auxiliary chlorohydrination reactor, an chlorohydrination reaction is performed by using the device, hypochlorous acid participating in the reaction does not contain hydrogen chloride, the concentration of the chloroalcohol at the outlet of the chlorohydrination reactor can be remarkably increased, and the production capacity of the device is high; and compared with the traditional chlorohydrination reaction technology, the technology of the invention has the following characteristics that the by-products are remarkably reduced, the wastewater is little in the subsequent saponification process, propylene and chlorine gas can be fed according to the theoretical molar ratio, and the raw material utilization rateis high.

Description

technical field [0001] The invention relates to a chemical product production device and its use method, in particular to a chlorohydrination reaction device for chemical epoxide production and its use method. Background technique [0002] There are various production methods of epoxides. The chlorohydrin method epoxide production technology is the earliest epoxide production method, and the chlorohydrination reactor is the key equipment for the production of epoxides. The currently used chloroalcoholation reactors include the early single-tower chloroalcoholation reactor, the single-tower chloroalcoholation reactor with a hypochlorous acid reactor and the three-tower series chloroalcoholation reactor of Japan's Mitsui East Asia, and the combination of tube and tower by Japan's Asahi Glass Chlorohydrination reactor, a tubular chlorohydrination reactor developed by Dow Chemical. There are many defects in existing chloroalcoholization reactors, such as the possibility that by...

AI Technical Summary

Problems solved by technology

There are many defects in existing chloroalcoholization reactors, such as the possibility that by-products will be generated due to direct contact between gaseous chloroalcoholization raw materials and chlorine gas in the production process; water reacts with chlorine gas to generate hypochlorous acid and simultaneously generates hydrogen chloride, and hydrogen chloride and chlorine The contact of chlorohydrins generated by the alcoholization reaction will also generate by-products, so the prior art needs to control the outlet chlorohydrins of the chlorohydrination reactor at a lower concentration to reduce the generation of by-products, which makes the existing chlorohydrination reactors produce The efficiency is not high; due to the low concentration of chlorohydrins at the outlet of the existing chlorohydrinization reactor, the amount of saponification wastewater in the subsequent saponification reaction production process is large; Alcoholization raw material recovery process is complex in operation, large in equipment investment and high in energy consumption

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