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:
Jan. 09, 2007
Filed:
Jan. 10, 2003
Tomoaki Tsuji, Okayama, JP;
Tomoaki Tsuji, Okayama, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
Bisphosphines represented by the general formula (I) wherein Arand Areach represents an arylene group which may be substituted; Rand Reach represents an alkyl group which may be substituted, or an aryl group which may be substituted, or Rand Rmay combinedly form a ring together with the phosphorus atom bonded thereto; Rand Reach represents hydrogen atom or an alkyl group; and the carbon atoms each having Rand Rare bonded in positions ortho to the oxygen atom bonded to Arand Ar; process for production thereof; Group VIII metal complexes comprising said bisphosphines; and process for producing aldehydes, which comprises, on hydroformylation of ethylenically unsaturated compounds with carbon monoxide and hydrogen, using said Group VIII metal complexes. The hydroformylation of ethylenically unsaturated compounds according to the present invention can produce n-aldehydes at higher reaction rate and industrially more advantageously than with catalysts comprising conventional phosphines, while suppressing side re-actions such as hydrogenation and isomerization.