METHOD FOR PRODUCING p-DICHLOROBENZENE - KUREHA CHEMICAL IND CO LTD

Title:

METHOD FOR PRODUCING p-DICHLOROBENZENE

Document Type and Number:

WIPO Patent Application WO/2004/022512

Kind Code:

A1

Abstract:

A method for producing p-dichlorobenzene wherein use is made of benzene and/or chlorobenzene as a raw material and the raw material is subjected to nucleus chlorination with molecular chlorine to form p-dichlorobenzene, characterized in that the chlorination is effected by the use of 0.1 to 3 mmol. of aluminum chloride relative to 1 mol. of the above raw material and 0.1 to 0.9 mol. of a phenothiazine, such as phenyl 10H-phenothiazine-10-carboxylate, relative to 1 mol. of the aluminum chloride and at a chlorination degree in the range of 1.2 to 2.5. The method allows the production of p-dichlorobenzene with improved para selectivity and a reduced reaction time.

Inventors:

WAKASUGI TAKASHI (JP)
NONAKA TSUGIO (JP)
MIYAKAWA TADASHI (JP)
HANABUSA TAKANOBU (JP)
SUNAGAWA KAZUHIKO (JP)
MIZUSAWA SHIGERU (JP)

Application Number:

PCT/JP2003/011223

Publication Date:

March 18, 2004

Filing Date:

September 03, 2003

Export Citation:

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Assignee:

KUREHA CHEMICAL IND CO LTD (JP)
WAKASUGI TAKASHI (JP)
NONAKA TSUGIO (JP)
MIYAKAWA TADASHI (JP)
HANABUSA TAKANOBU (JP)
SUNAGAWA KAZUHIKO (JP)
MIZUSAWA SHIGERU (JP)

International Classes:

C07B61/00; C07C17/12; C07C25/08; (IPC1-7): C07C17/12; C07C25/08

Domestic Patent References:

WO1997043041A1

1997-11-20

Foreign References:

EP0474074A1	1992-03-11
EP0126669A1	1984-11-28

Other References: