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.:
Date of Patent:
May. 26, 1981
Filed:
Dec. 10, 1979
Tetsuo Osa, Sendai, JP;
Masamichi Fujihira, Sendai, JP;
Tomokazu Matsue, Sendai, JP;
Takashi Yamauchi, Tokyo, JP;
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of preparing para-chlorotoluene by the electrolytic chlorination of toluene in an aqueous solution of hydrogen chloride or a metal halide as an electrolyte by passing an electric current from a cathode to an anode, both of which are immersed in the electrolyte, in order to form an active chlorine species which then reacts with toluene to produce the desired para-toluene. The anode is made of a carbonaceous material having cyclodextrin or a derivative thereof bonded onto its surface. The toluene that is introduced into the aqueous solution of electrolyte is included as a clathrate compound within the cyclodextrin.