申请人:Dynamit Nobel Aktiengesellschaft
公开号:US04000052A1
公开(公告)日:1976-12-28
A process for preparing a chloromethyl-tetrachlorobenzene which comprises the steps of: A. contacting a xylene in a chlorine resistant solvent with 0.5 to 2, preferably 1 to 2 weight percent of FeCl.sub.3, based upon the weight of said xylene, at a temperature of 20 to 70.degree. C in the absence of light in a vessel having a vapor space over the level of the xylene solution. B. introducing into said vapor space chlorine and passing the same over said solution while strongly agitating the solution, said chlorine being introduced such that an excess pressure of 0.01 to 1 atmosphere exists over said solution; C. maintaining said solution at said temperature of 20 to 70.degree. C for a period of time at least 0.5 hours, preferably between 3 and 6 hours; D. thereafter directing energy-rich light at said vapor space while adding chlorine into said vapor space and maintaining the excess pressure over said solution at 0.01 to 1 atmosphere while maintaining the solution at a temperature of 50.degree. to 80.degree. C for a period of time of at least 0.5 hours, preferably between 4 and 7 hours and while continuing said agitation; and E. separating and recovering a chloromethyltetrachlorobenzene.
制备氯甲基四氯苯的过程包括以下步骤:A. 在耐氯溶剂中,将0.5-2重量%的FeCl.sub.3与二甲苯接触,以二甲苯的重量为基础,在无光的条件下,在具有液面上方的蒸汽空间的容器中,在20-70℃的温度下进行。B. 将氯气引入该蒸汽空间,并在强烈搅拌液体的同时通过该溶液,引入氯气,使得在溶液上存在0.01-1大气压的过压。C. 在20-70℃的温度下,将该溶液保持至少0.5小时的时间,最好在3-6小时之间。D. 随后,在向该蒸汽空间中添加氯气并保持过压为0.01-1大气压的同时,将高能光直接照射到该蒸汽空间,并将溶液保持在50℃至80℃的温度下,至少保持0.5小时的时间,最好在4-7小时之间,并继续搅拌; E. 分离和回收氯甲基四氯苯。