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:
May. 26, 1987
Filed:
Jul. 30, 1984
Jean Jenck, Chalampe, FR;
Didier Morel, Lyons, FR;
Rhone-Poulenc Recherches, Courbevoie, FR;
Abstract
Essentially pure tri-(m-sulfophenyl)-phosphine, well suited as a ligand for the formation of, e.g., rhodium-based olefin hydroformylation catalysts, is facilely prepared by (i) sulfonating triphenylphosphine with oleum, H.sub.2 SO.sub.4 /SO.sub.3, wherein the temperature of sulfonation ranges from 15.degree. to about 25.degree. C., the molar ratio of SO.sub.3 /triphenylphosphine is at least 8, and the amount by weight of SO.sub.3 in the mixture (SO.sub.3 +H.sub.2 SO.sub.4 +triphenylphosphine) at the beginning of said sulfonation reaction is at least 33%; and (ii) thence terminating said sulfonation reaction via hydrolysis of the reaction mixture.