申请人:Sasaki Kentaro
公开号:US20100324337A1
公开(公告)日:2010-12-23
There is provided a process capable of preventing the adhesion of a catalyst to an evaporator in a step of separating a chlorophosphite as a target substance from a reaction liquid by evaporation. The process includes a first step of allowing phosphorus trichloride and a phosphorous acid triester represented by (RO)
3
P to react in the presence of a catalyst having a viscosity at 80° C. of 100 mPa·s or lower to produce a chlorophosphite represented by RO(R′)PCl, and a second step of vaporizing a reaction liquid containing the chlorophosphite obtained in the first step, in a short time, to separate the catalyst.
提供了一种防止催化剂在通过蒸发将氯代亚磷酸酯作为目标物质从反应液中分离的步骤中粘附到蒸发器上的方法。该方法包括第一步,在催化剂存在下,让三氯化磷和以(RO)3P表示的磷酸三酯反应,产生以RO(R′)PCl表示的氯代亚磷酸酯;第二步,在短时间内蒸发含有第一步中得到的氯代亚磷酸酯的反应液,以分离催化剂。