Patents by Inventor Bertrand Raymond Da Cruz

Bertrand Raymond Da Cruz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cobalt recovery from cobalt catalysed hydroformylation reactions
    Patent number: 7910782
    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.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: March 22, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Eddy T. A. Van Driessche, Arie Van Vliet, Raphael Frans Caers, Hubertus Joseph Beckers, Ronald Dean Garton, Bertrand Raymond Da Cruz, Michel J. P. Lepagnol, Edwin Kooke
  • Cobalt Recovery From Cobalt Catalysed Hydroformylation Reactions
    Publication number: 20100228046
    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 vapour/liquid extraction techniques followed by the absorption of cobalt from the vapour in an organic liquid both benefit from this improvement.
    Type: Application
    Filed: March 28, 2008
    Publication date: September 9, 2010
    Inventors: Eddy T.A. Van Driessche, Arie Van Vliet, Raphael Frans Caers, Hubertus Joseph Beckers, Ronald Dean Garton, Bertrand Raymond Da Cruz, Michel J.P. Lepagnol, Edwin Kooke