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. 15, 1981
Filed:
Aug. 06, 1980
Mitsuo Matsumoto, Kurashiki, JP;
Masuhiko Tamura, Kurashiki, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
In hydroformylating an olefinic compound in an organic solvent and in the presence of a rhodium complex and a trisubstituted phosphine to give the corresponding aldehyde, at least one diphosphino compound of the following general formula (I) is added to the reaction system in a proportion of 0.20 to 5.0 equivalents per rhodium atom in the rhodium complex ##STR1## wherein A.sup.1 and A.sup.2, respectively, are aryl groups; R.sup.1 and R.sup.2, respectively, are an aryl group or a saturated hydrocarbon residue containing 1 or more carbon atoms; and ##STR2## represents a substituted or unsubstituted alicyclic hydrocarbon group containing 3 to 6 carbon atoms in the main ring. The addition of diphosphino compound (I) has a remarkable life-prolonging effect on the rhodium catalyst.