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:
Dec. 10, 2013
Filed:
Apr. 27, 2010
Hideo Kitagawa, Kawasaki, JP;
Junya Kiyosu, Kawasaki, JP;
Susumu Saito, Chiba, JP;
Takaomi Hayashi, Chiba, JP;
Naritoshi Yoshimura, Funabashi, JP;
Aya Nakagawa, Sodegaura, JP;
Hideo Kitagawa, Kawasaki, JP;
Junya Kiyosu, Kawasaki, JP;
Susumu Saito, Chiba, JP;
Takaomi Hayashi, Chiba, JP;
Naritoshi Yoshimura, Funabashi, JP;
Aya Nakagawa, Sodegaura, JP;
Mitsui Chemicals, Inc., Minato-Ku, Tokyo, JP;
Abstract
The present invention is a method for producing a polyhydric phenol, including the following steps (a) to (d): (a) a first step of producing (4S,5R,6S)-4,5,6-trihydroxy-2-cyclohexcene-1-one from 2-deoxy-scyllo-inosose by a dehydration reaction; (b) a second step of producing 1,2,4-trihydroxybenzene from the (4S,5R,6S)-4,5,6-trihydroxy-2-cyclohexene-1-one obtained in the first step by a dehydration reaction; (c) a third step of producing 4-hydroxycyclohexane-1,3-dione from the 1,2,4-trihydroxybenzene by a catalytic hydrogenation reaction with the use of a metal catalyst; and (d) a fourth step of producing hydroquinone by heating the 4-hydroxycyclohexane-1,3-dione.