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:
Jun. 18, 2013
Filed:
Jan. 09, 2009
Michael L. Tulchinsky, Midland, MI (US);
Ronald R. Peterson, St. Albans, WV (US);
Michael L. Tulchinsky, Midland, MI (US);
Ronald R. Peterson, St. Albans, WV (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
A compound comprising a sulfonated dihydrocarbyl(arylalkyl)phosphine of formula RRPR—(SOM), wherein the Rand Rare selected individually from alkyl, aralkyl, and alicyclic groups, and Ris a divalent or polyvalent arylalkylene radical such that the alkyl moiety is bonded to the phosphorus atom and the aryl moiety is bonded to the alkyl and is also substituted with one or more sulfonate groups; M is a monovalent cation, and n ranges from 1 to 3. The compound is useful as a ligand in transition metal-ligand complex catalysts that are capable of catalyzing the hydroformylation of an olefinically-unsaturated compound with carbon monoxide and hydrogen to form one or more corresponding aldehyde products. The ligand is incapable of alkyl-aryl exchange, thereby leading to reduced ligand usage and improved ligand and transition metal, e.g., rhodium, recovery and recycling.