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:
Feb. 17, 2009
Filed:
Dec. 09, 2005
Eit Drent, Amsterdam, NL;
Michael Rolf Eberhard, Honolulu, HI (US);
Paul Gerald Pringle, Bristol, GB;
Renata Helena Van Der Made, Amsterdam, NL;
Eit Drent, Amsterdam, NL;
Michael Rolf Eberhard, Honolulu, HI (US);
Paul Gerald Pringle, Bristol, GB;
Renata Helena van der Made, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
Process for the telomerization of a conjugated diene, wherein the conjugated diene is reacted with a compound containing an active hydrogen atom and having a formula R'—H in the presence of a telomerization catalyst based on: (a) a source of group VIII metal, (b) a bidentate ligand wherein the bidentate ligand has the general formula IRRM-R-MRR  (I)wherein Mand Mare independently P, As or Sb; R, R, Rand Rindependently represent a monovalent aliphatic group;or R, Rand Mtogether and/or R, Rand Mtogether independently represent an optionally substituted aliphatic cyclic group with at least 5 ring atoms, of which one is the Mor Matom, respectively;R represents a bivalent organic bridging group; and novel bidentate diphosphines which can be used in this process.