Method for preparing di(2-ethylhexyl) peroxydicarbonate

Abstract

The invention discloses a method for preparing di(2-ethylhexyl) peroxydicarbonate. The method includes the following steps: (1) pumping a hydrogen peroxide aqueous solution and a sodium hydroxide aqueous solution into a first microreactor of a micro-reaction device for reaction to obtain a reaction solution A; (2) pumping the reaction solution A obtained in the step (1) and 2-ethylhexyl chloroformate separately into a second microreactor of the micro-reaction device for reaction to obtain a reaction solution B; (3) making the reaction solution B obtained in the step (2) react in a self-made reactor continuously and introducing the reaction solution into a separation tank for static stratification to obtain an upper oil phase to obtain the di(2-ethylhexyl) peroxydicarbonate. The method hasthe advantages of simple process, continuous production, fast reaction, high yield, low cost, good operability, high operation safety, high selectivity and direct amplification for industrial production.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a method for continuously preparing di(2-ethylhexyl) peroxydicarbonate by using a microchannel reaction device combined with a self-made reactor. Background technique [0002] Bis(2-ethylhexyl) peroxydicarbonate (EHP) is a colorless transparent liquid, which is a highly active initiator. Compared with other peroxydicarbonate initiators, its transportation and storage stability Preferably, because it is insoluble in water, it is not easy to produce a water phase polymer when the polymerization reaction is initiated, the tendency of sticking to the kettle is small, and the heat release of the polymerization reaction is uniform, and it is easy to obtain a uniform reaction. Therefore bis(2-ethylhexyl) peroxydicarbonate has become one of the most promising initiators. [0003] But the synthesis of di(2-ethylhexyl) peroxydicarbonate mostly adopts ethylhexanol an...

AI Technical Summary

Problems solved by technology

[0003] But the synthesis of di(2-ethylhexyl) peroxydicarbonate mostly adopts ethylhexanol and phosgene to react (2-ethyl)hexyl chloroformate at present, and then makes by peroxidation reaction, and phosgene is high Toxic substances, potential safety hazards

In addition, due to the high activity of bis(2-ethylhexyl) peroxydicarbonate, low decomposition temperature, easy decomposition and even explosion, the existing kettle technology has the disadvantages of high raw material consumption, unstable reaction and low yield, and traditional The reaction cycle in the reactor is long, the amplification effect is obvious, and safety accidents are prone to occur

The traditional pipeline microreactor increases the energy consumption due to the excessive length of the pipeline, and the excessive pressure drop of the pipeline increases the difficulty of operation. At the same time, the service life of the pump is shortened if the pressure drop is too large. At the same time, there are serious safety hazards if the pressure drop is too large.

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