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:
Sep. 21, 1982
Filed:
Feb. 26, 1981
Donald C Cronauer, Gibsonia, PA (US);
Robert B Bjorklund, Linkoping, SE;
Gulf Research & Development Company, Pittsburgh, PA (US);
Abstract
This invention relates to a method for selectively removing molybdenum values from a spent catalyst and producing a fresh molybdenum-containing catalyst. Such a method preferably contacts anhydrous gaseous hydrogen chloride at an elevated temperature with the metal containing catalyst which is substantially free of carbonaceous material to selectively remove molybdenum therefrom, and producing a fresh molybdenum-containing catalyst by depositing molybdenum from the vapor phase onto a fresh support in the presence of air. At least 50 weight percent and generally as much as 95 weight percent of the molybdenum is removed while other metals such as iron, titanium, cobalt and nickel along with the supporting alumina or silica are not affected.