Kureha Corporation

Shigeru Mizusawa

Kazuhiko Sunagawa

Satoru Kumazawa

Takashi Wakasugi

Nobuyuki Kusano

Tadashi Miyakawa

Hajime Hoshi

Tsugio Nonaka

Takanobu Hanabusa

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&#x2013;3 millimols per mol of the starting material and phenothiazines such as 10H-phenothiazine-10-carboxylic acid phenyl ester in an amount of 0.1&#x2013;0.9 mols per mol of aluminum chloride so as to be a chlorination degree in a range of 1.2&#x2013;2.5, by which p-dichlorobenzene can be obtained in a high para-selectivity and a short reaction time.

Method for producing p-dichlorobenzene

5-[(4-chlorophenyl)methyl]-2,2-dimethylcyclopentanone is produced by

Process for the preparation of 5-[(4-chlorophenyl)methyl]-2,2-dimethylcyclopentanone

Growing community of inventors

Fukushima, Japan

Shigeru Mizusawa