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:
Jan. 25, 2000
Filed:
Apr. 28, 1997
Patrick M Burke, Wilmington, DE (US);
James M Garner, Wilmington, DE (US);
Wilson Tam, Boothwyn, PA (US);
Kristina A Kreutzer, Wilmington, DE (US);
Antonius J Teunissen, Geleen, NL;
Carina S Snijder, Sittard, NL;
Carolina B Hansen, Sittard, NL;
DSM N.V., Heerlen, NL;
EI DuPont De Nemours and Company, Wilmington, DE (US);
Abstract
A hydroformylation process for preparating a terminal aldehyde involves reacting an ethylenically unsaturated organic compound with carbon monoxide and hydrogen in the presence of a catalyst system iridium or rhodium and a bidentate organic phosphite ligand wherein the two phosphorus atoms of the phopshite ligand are linked with a 2,2'-dihydroxyl-1,1'-binapthalene bridging group having the following structure (Q): ##STR1## in which R.sup.1 and R.sup.2 are substituents other than hydrogen and in which R.sup.3 and R.sup.4 are the same or different substituted monovalent aryl groups and/or any one of OR.sup.3 and OR.sup.4 connected to one phosphorus atom forms an --O--R.sup.5 --O-group, where R.sup.5 is a divalent organic group containing one or two aryl groups.