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:
Oct. 20, 2015
Filed:
Apr. 25, 2013
Umicore Ag & Co. KG, Hanau, DE;
Eileen Woerner, Nidderau, DE;
Timo Ebert, Kahl, DE;
Ralf Karch, Kleinostheim, DE;
Andreas Rivas-Nass, Schriesheim, DE;
Angelino Doppiu, Seligenstadt, DE;
Juergen Widmer, Rodenbach, DE;
UMICORE AG & CO. KG, Hanau-Wolfgang, DE;
Abstract
The invention relates to a process for preparing diketonato-rhodium(I)-carbonyl complexes, especially diketonato-rhodium(I)-triorganophosphine-carbonyl complexes, for example Rh(CO)(PPh)acac. The process according to the invention is a 'one-pot synthesis' and features a process procedure without intermediate isolation stages. After introduction of an Rh(III) halide precursor into a solvent and sparging with carbon monoxide (CO), a diketo compound of the R'—C(═O)—CH—C(═O)—R″ type and a base are added, forming the intermediate compound diketonato-Rh(CO). After addition of a triorganophosphine of the PRtype, the reaction mixture is heated and the diketonatocarbonyltriorganophosphine-rhodium(I) complex is removed. The process enables a rapid operation and a high yield. The complex Rh(CO)(PPh)acac prepared in accordance with the invention, because of its purity, is particularly suitable as a catalyst or precatalyst for homogeneous catalysis, for example for hydroformylation reactions.