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:
Nov. 06, 2001
Filed:
Sep. 02, 1999
Norimoto Kiya, Wakayama, JP;
Shinsaku Kawasaki, Wakayama, JP;
Kenji Ekawa, Wakayama, JP;
Kenji Sugiyama, Wakayama, JP;
Toyokazu Kitaura, Wakayama, JP;
Honshu Chemical Industry Co., Ltd., Tokyo, JP;
Abstract
The process for producing alicyclic monoketones (hydroxyphenylcyclohexanone derivatives) according to the present invention comprises hydrogenating substituted bisphenols such as bisphenol A in a solvent in the presence of a palladium/alkali metal catalyst in which palladium and an alkali metal are both supported on a carrier to obtain alicyclic monoketones such as 2-(4-oxocyclohexyl)-2-(4-hydroxyphenyl)propane. The process for producing alicyclic diketones according to the present invention comprises hydrogenating substituted bisphenols such as bisphenol A in a solvent in the presence of a palladium/alkali metal catalyst in which palladium and an alkali metal are both supported on a carrier to obtain alicyclic diketones such as 2,2-bis(4-oxocyclohexyl)propane and 4,4′-bicyclohexanone. The other process for producing alicyclic monoketones according to the present invention comprises hydrogenating biphenols such as bis(4-hydroxyphenyl) in an organic solvent in the presence of a palladium catalyst in which 10 to 30% by weight of palladium is supported on a carrier to obtain alicyclic monoketones such as 4(4′-hydroxyphenyl)cyclohexanone. According to the present invention, alicyclic monoketones or alicyclic diketones can be obtained with high selectivity and in high yields through simple steps, because the process includes only one reaction step to hydrogenate substituted bisphenols under relatively mild conditions.