Preparation of boron trichloride

Details Preparation of boron trichloride Preparation of boron trichloride

C - Chemistry, Metallurgy

01

B

23/8

C01B 35/06 (2006.01)

Patent

CA 1110427

Abstract of the Disclosure Boron trichloride is prepared by free-radical chlorination of liquid borate ester, e.g., trimethyl borate, at temperatures of between about 20°C. and 100°C. Color bodies which form and accumulate in the liquid reaction mixture are removed by extracting a purge fraction of the reaction mixture from the reactor, distilling such liquid reaction mixture, and recycling distillate obtained from the distillation to the reactor. The volume of the purge fraction can vary between about 4 and about 20 volume percent of the reaction mixture per hour. Borate ester can be added to the distillate before introducing it into the reactor.

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