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:
Jul. 06, 1976
Filed:
Jan. 22, 1975
Applicant:
Inventors:
Guglielmo Gregorio, Milan, IT;
Giorgio Montrasi, Gabagnate Milanese (Milan), IT;
Assignee:
Montedison S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
2604 / ; 2606 / ;
Abstract
Complexes of transition metals with organic ligands are recovered from raw reaction products containing the complexes, and in particular such complexes of rhodium with tertiary phosphines are recovered from raw hydroformylation products. The raw hydroformylation product (or if such product is subjected to distillation, the tails of the distillation) are treated with an aqueous solution of an aldehyde having from 1 to 4 carbon atoms and of a strong acid and the solid rhodium complex thus formed is separated by filtration.