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:
Apr. 08, 1986
Filed:
Apr. 29, 1985
Applicant:
Inventors:
Francis L Himpsl, Matawan, NJ (US);
Robert W Andrews, Toms River, NJ (US);
Barry K Speronello, River Edge, NJ (US);
Assignee:
Engelhard Corporation, Menlo Park, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ;
U.S. Cl.
CPC ...
502 65 ; 502 67 ; 502 68 ;
Abstract
Co-product fines from the manufacture of zeolitic cracking catalysts from microspheres of calcined clay have heretofore been discarded as a waste stream. These fines, recovered as a moist cake, are slurried in a sodium silicate solution, spray dried to form microspheres and ion-exchanged initially at high pH and then at lower pH to produce attrition-resistant cracking catalysts which produce low levels of coke during use.