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:
Aug. 12, 1986
Filed:
Aug. 26, 1985
Applicant:
Inventor:
Joseph Pugach, Ridgewood, NJ (US);
Assignee:
The Halcon SD Group, Inc., Montvale, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G / ;
U.S. Cl.
CPC ...
423 22 ; 502 24 ; 260546 ; 260549 ;
Abstract
Heavy residues produced by noble metal catalyzed carbonylation reactions and containing Group VIII noble metals, particularly rhodium, are treated with a mixture of immiscible liquids to precipitate solids containing substantially all of the noble metal contained in the residues. The solids may be returned directly for reuse in the carbonylation reaction. One group of liquids consists of water with immiscible alcohols or hydrocarbons, or mixtures thereof. A second group consists of acetic anhydride with immiscible hydrocarbons.