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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4444983 B1

PDFFull Text
Date of Patent:
Apr. 24, 1984

Filed:

Apr. 15, 1982

Process for the nuclear chlorination of toluene

Applicant:
Inventors:

Ryoji Hattori, Kooriyama, JP;

Yoshihiko Abe, Kooriyama, JP;

Sueo Kanno, Kooriyama, JP;

Satoshi Maeda, Kooriyama, JP;

Assignee:

Hodogaya Chemical Co., Ltd., Tokyo, JP;

Attorney:

Bucknam and Archer

Primary Examiner:

Charles F Warren

Assistant Examiner:

Joseph A Boska

Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570209 ;
Abstract

Para-chlorotoluene is prepared selectively at high yield by nuclear chlorination of toluene, in the presence of a Lewis acid catalyst, and a co-catalyst comprising at least one compound selected from the group consisting of phenoxthine derivatives and highly chlorinated phenoxthine derivatives obtained by chlorinating said phenoxthine derivatives at higher degree, said phenoxthine derivatives being represented by the general formula of: ##STR1## wherein R represents methyl group or groups at the position-1 and/or position-3,

Find Patent Forward Citations

Hattori, Ryoji. (1984). Process for the nuclear chlorination of toluene (U.S. Patent No. 4444983). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4444983

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