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. 25, 1989
Filed:
Jan. 04, 1988
Applicant:
Inventor:
Francis X Ryan, Lambertville, NJ (US);
Assignee:
Mobil Oil Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423118 ; 423326 ; 423328 ; 502 85 ; 502502 ;
Abstract
There is provided a three-step method for removing the residue of an organic directing agent from as-synthesized zeolites. The first step involves contacting the as-synthesized zeolite with an aqueous solution of a fluorosilicate salt such as ammonium fluorosilicate. The second step involves ion-exchanging the zeolite with an alkali metal or alkaline earth metal salt such as KCl. The third step involves calcining the ion-exchanged zeolite. This method is particularly useful for removing the residue of an organic directing agent from ZSM-18.