The synthetic method of di(2-ethylhexyl) peroxydicarbonate

Abstract

The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a synthetic method of bis(2-ethylhexyl) peroxydicarbonate. Mix hydrogen peroxide and sodium hydroxide in the first microchannel continuous flow reactor; then mix and react with chlorinated ester in the second microchannel continuous flow reactor; the temperature of the first microchannel continuous flow reactor is 15-30°C ; The second microchannel continuous flow reactor is composed of 3-10 microchannel mixer substrate connections, and the temperature of the second microchannel continuous flow reactor is controlled to be 30-44°C. The invention has extremely high heat and mass transfer efficiency, realizes segmental temperature control, solves the problem of product decomposition caused by temperature out of control and increased side reactions, and simultaneously reduces energy consumption costs and risk factors. By adopting the synthesis method described in the invention, the reaction conversion rate is above 99.2%, and the selectivity is above 98.5%.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a synthesis method of bis(2-ethylhexyl) peroxydicarbonate. Background technique [0002] Di(2-ethylhexyl) peroxydicarbonate, also known as initiator EHP, dioctyl peroxydicarbonate, referred to as EHP, is easily decomposed into free radicals under heat or light conditions, so it can be widely used as a free radical type The initiator of the reaction, such as polyethylene, PVC, polyvinyl acetate, etc. in the production. EHP was used as an initiator for the polymerization of vinyl chloride. Its advantages are high initiation rate, short polymerization time, low polymerization temperature, less usage, good product quality and low residual toxicity. [0003] The traditional production process is mostly batch reaction, and hydrogen peroxide, solid alkali, water and chlorinated ester are used as raw materials to produce EHP. The existing problems...

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Problems solved by technology

[0003] The traditional production process is mostly batch reaction, and hydrogen peroxide, solid alkali, water and chlorinated ester are used as raw materials to produce EHP. The existing problems are as follows: for safety, a large amount of water is added, energy consumption is high, danger is high, and reaction time is long , produces a lot of waste water, and the reaction process is not easy to control

[0004] Chinese patent CN 105198783A discloses a kind of production method of bis(2-ethylhexyl) peroxydicarbonate, the method is 27% hydrogen peroxide, mass fraction is 32% ionic membrane liquid caustic soda and chlorinated ester, synchronously Stirring and reacting at normal temperature and pressure for 60 minutes; after the reaction, the oil phase product is separated and obtained. This method is a tank reaction, and the reaction time is relatively long

The reaction temperature of this method is relatively low, the reaction time is relatively long, and the selectivity is not good. At the same time, a part of the delay pipeline is used, which leads to poor mixing efficiency of the reaction and affects product quality.

At the same time, its concentration of sodium hydroxide is relatively low, which will produce more waste water

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