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:
Feb. 28, 1984
Filed:
Nov. 16, 1981
Applicant:
Inventor:
Joseph Pugach, Ho-Ho-Kus, NJ (US);
Assignee:
The Halcon SD Group, Inc., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; C07C / ; C01G / ;
U.S. Cl.
CPC ...
502 24 ; 260546 ; 260549 ; 423 22 ; 502 25 ; 502 29 ;
Abstract
Heavy residues produced by noble metal catalyzed carbonylation reactions and containing Group VIII noble metals, particularly rhodium, are treated with reagents to precipitate solids containing substantially all of the noble metal contained in the residues. The solids may be further treated to recover the noble metals or they may be returned directly for reuse in the carbonylation reaction. Suitable reagents include alkali metal hydroxides, alkali metal peroxides, alkali metal borohydrides, and other reducing agents, such as formaldehyde and acidified sodium bisulfite.