申请人:Wakasugi Takashi
公开号:US20060106264A1
公开(公告)日:2006-05-18
In a process for preparing p-dichlorobenzene by nuclear chlorination of benzene and/or chlorobenzene as the starting material with chlorine molecules, chlorination is carried out using aluminum chloride in an amount of 0.1-3 millimols per mol of the starting material and phenothiazines such as
10
H-phenothiazine-10-carboxylic acid phenyl ester in an amount of 0.1-0.9 mols per mol of aluminum chloride so as to be a chlorination degree in a range of 1.2-2.5, by which p-dichlorobenzene can be obtained in a high para-selectivity and a short reaction time.
在用氯分子对作为起始原料的苯和/或氯苯进行核氯化制备对二氯苯的工艺中, 氯化铝的用量为每摩尔起始原料 0.1-3 毫摩尔,吩噻嗪类如
10
H-吩噻嗪-10-羧酸苯酯,氯化铝的用量为每摩尔 0.1-0.9 毫摩尔,从而使氯化度在 1.2-2.5 范围内,这样就能以较高的副选择性和较短的反应时间获得对二氯苯。