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, 1995
Filed:
Mar. 02, 1993
Applicant:
Inventors:
Michael Grebner, Mainz, DE;
Axel Reich, Schornsheim, DE;
Ferdi Schuth, Mainz, DE;
Klaus Unger, Seeheim-Jugenheim, DE;
Assignee:
Merck Patent Gesellschaft mit Beschrankter Haftung, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; B01J / ;
U.S. Cl.
CPC ...
423706 ; 4233281 ; 4233282 ; 423331 ; 423333 ; 423704 ; 423709 ; 502 64 ;
Abstract
The invention relates to a process for the preparation of crystalline clathrasil of the dodecasil 1 H structural type having an average crystal size of not more than 20 .mu.m, characterised in that an alkaline aqueous silicate-containing medium comprising templates and crystallisation seeds is heat-treated, the crystallisation seeds content, relative to the SiO.sub.2 content of the medium, being not less than 1% by weight.