申请人:——
公开号:US20030078459A1
公开(公告)日:2003-04-24
According to the invention, 2,3,4,5-tetrachlorobenzotrifluoride is prepared by chlorinating 4-chlorobenzotrifluoride with elementary chlorine. The chlorination is conducted in the presence of 0.1 to 2 wt. % iron (III) chloride and 0.5 to 0.75 wt. % aluminum (III) chloride, each with regard to 4-chlorobenzotrichloride, whereby the weight ratio of iron (III) chloride to aluminum (III) chloride ranges from 10:1 to 1:1.
根据本发明,2,3,4,5-四氯三氟甲苯是通过用基本氯对 4-氯三氟甲苯进行氯化制备的。氯化过程是在氯化铁(III)重量百分比为 0.1 至 2、氯化铝(III)重量百分比为 0.5 至 0.75 的情况下进行的,其中氯化铁(III)与氯化铝(III)的重量比为 10:1 至 1:1。