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, 2002
Filed:
Feb. 08, 2001
Noboru Daitou, Kitakyushu, JP;
Shingo Ueda, Kitakyushu, JP;
Ryouji Akamine, Kitakyushu, JP;
Kazuyoshi Horibe, Kitakyushu, JP;
Katsuhiko Sakura, Kitakyushu, JP;
Nippon Steel Chemical Co., Ltd., Tokyo, JP;
Abstract
High-purity benzyl benzoate is recovered by distilling the residue remaining after removal of unreacted toluene and benzoic acid from a reaction mixture produced by the oxidation of toluene by molecular oxygen in the presence of a metal catalyst thereby separating a fraction of benzyl benzoate containing 80 wt % or more benzyl benzoate, 10 wt % or less benzoic acid and 10 wt % or less fluorenone, and purifying the fraction of benzyl benzoate by crystallization such as recrystallization. According to this process, it is possible to recover high-purity benzyl benzoate by a simple operation at low cost from the by-product formed in the manufacture of benzoic acid.