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. 27, 2017
Filed:
Aug. 31, 2016
Eastman Chemical Company, Kingsport, TN (US);
Thomas James Devon, Longview, TX (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
A new stable, catalytically active, tetradentate organophosphorus modified rhodium hydroformylation catalyst has been discovered that is capable of producing aldehyde products with a high linear/branched product ratio from linear olefins. The tetradentate organophosphorus modifier is a tetrasubstituted 2,2',2″,5′-tetramethyl-1,1′:4′-1″-terphenyl, whereby, each methyl group has one hydrogen substituted by an R, R′-diorganophosphine moiety. The R, R′ may comprise aromatic, alkyl, arylalkyl and alkylaryl groups. The precursor 2,2′,2″,5′-tetramethyl-1,1′:4′,1″-terphenyl hydrocarbon may be prepared from para-xylene and toluene derivatives.