A method and system for producing ethyl chloride

Abstract

The invention discloses a method for producing ethyl chloride, which comprises steps as follows: hydrochloric acid and zinc chloride after concentration by evaporation enter a hydrochloric acid heating unit from the bottom to be heated, enter an ethyl chloride reactor, and are subjected to thermal separation of the ethyl chloride and mixed solution; the separated magnesium chloride enters an evaporation dehydrator to be heated; the zinc chloride solution is concentrated; and the high-concentration zinc chloride naturally flows to the lower part of a hydrochloric acid evaporator to be recycled. The invention can be matched with a climbing film graphite evaporator with larger heat transfer area to implement the large-size ethyl chloride reactor and enhance the level of the ethyl chloride industrialization device; the reaction rate and raw material conversion rate are enhanced; graphite is used as the distributor of the ethyl chloride reaction part, so the corrosion resistance is high; the steel liner polytetrafluoroethylene cylinder and pipeline are adopted, thereby resisting corrosion and enhancing the operating pressure and equipment utilization ratio; and in addition, the invention is convenient to operate, enhances the production efficiency of ethyl chloride, and has favorable application value.

Description

Technical field [0001] The invention belongs to the field of chemical production, and particularly relates to a method and system for producing ethyl chloride. Background technique [0002] At present, the production of ethyl chloride by haloalkylation method uses Tang porcelain reactor as the reaction equipment. Hydrochloric acid and alcohol are mixed in a certain ratio and then added to the reactor. The jacket of the reactor is heated by steam to control the temperature of the reaction material and simultaneously generate The chloroethane, unreversed hydrochloric acid, alcohol, brought in water, and water produced by chemical reactions are all vaporized and transferred out of the reactor. Due to the use of pottery equipment, the operating pressure is limited, and the operating temperature cannot reach ideal conditions, resulting in an ethanol conversion rate of only about 80%; unreacted hydrochloric acid, alcohol, water brought in from raw materials, and water produced by chemi...

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Problems solved by technology

[0003] The purpose of the present invention is to use a method and system for producing ethyl chloride, aiming to solve the problems of complex operation, low work efficiency and many unsafe factors in the existing production of ethyl chloride

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