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:
Aug. 12, 2008
Filed:
Mar. 07, 2007
Toshinari Miura, Kawasaki, JP;
Hirokazu Kakinuma, Kawasaki, JP;
Takenobu Kawano, Kawasaki, JP;
Hirohide Matsuhisa, Yokohama, JP;
Toshinari Miura, Kawasaki, JP;
Hirokazu Kakinuma, Kawasaki, JP;
Takenobu Kawano, Kawasaki, JP;
Hirohide Matsuhisa, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for producing furan-2,5-dicarboxylic acid (FDCA) is provided which can efficiently and quantitatively producing FDCA under mild conditions, without employing an expensive catalyst and with a reduced energy consumption. A furan ring compound having two functional groups selected from a hydroxymethyl group, a formyl group and a carboxyl group in the 2- and 5-positions of the furan ring, is oxidized with a metal permanganate in an alkaline environment to produce furan-2,5-dicarboxylic acid. Advantageously, the alkaline environment contains at least one of alkali metal hydroxides and alkali earth metal hydroxides, and the oxidation is performed at a temperature of from 1 to 50° C. by adding the permanganate metal salt to the alkaline aqueous solution containing the furan ring compound.