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:
Mar. 22, 2011
Filed:
Mar. 28, 2008
Eddy T. A. Van Driessche, Eeklo, BE;
Arie Van Vliet, Stevvebeek, BE;
Raphael Frans Caers, Edegem, BE;
Hubertus Joseph Beckers, Keerbergen, BE;
Ronald Dean Garton, Wezembeek-Oppem, BE;
Bertrand Raymond Da Cruz, Lambersart, FR;
Michel J. P. Lepagnol, Mont Saint Aignan, FR;
Edwin Kooke, Ridderkerk, NL;
Eddy T. A. Van Driessche, Eeklo, BE;
Arie Van Vliet, Stevvebeek, BE;
Raphael Frans Caers, Edegem, BE;
Hubertus Joseph Beckers, Keerbergen, BE;
Ronald Dean Garton, Wezembeek-Oppem, BE;
Bertrand Raymond Da Cruz, Lambersart, FR;
Michel J. P. Lepagnol, Mont Saint Aignan, FR;
Edwin Kooke, Ridderkerk, NL;
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
In a hydroformylation reaction, the circulation and recovery of cobalt carbonyl in a cobalt catalyst cycle using carbonylate as an intermediate and acidification thereof, is improved by supplying an aqueous sulfuric acid solution containing less than 16% wt of sulfuric acid to the carbonylate to control sulfuric acid concentration in the carbonylate/acid mixture, before accounting for any acid consuming reaction, to a value of from 2% to 10% by weight. Single step and multistage liquid/liquid extraction techniques as well as vapor/liquid extraction techniques followed by the absorption of cobalt from the vapor in an organic liquid both benefit from this improvement.