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:
Jan. 16, 1990
Filed:
Oct. 31, 1985
Applicant:
Inventors:
Bernd Hupe, Hameln, DE;
Robert Walter, Langenhagen, DE;
Assignee:
Kali-Chemie Aktiengesellschaft, Hanover, DE;
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C01B / ; B01J / ; B01J / ;
U.S. Cl.
CPC ...
502233 ; 2523156 ; 2523157 ; 423338 ; 423608 ; 423610 ; 423622 ; 423628 ; 423629 ; 423636 ; 502 10 ; 502238 ; 502239 ; 502340 ; 502343 ; 502355 ; 502405 ; 502407 ; 502415 ; 502439 ;
Abstract
A process for adjusting at least one of the structural and surface characteristics of an oxide material, e.g. SiO.sub.2 or Al.sub.2 O.sub.3, by dehydration of a water-containing oxide gel under supercritical conditions by extracting the water with an extraction agent such as CO.sub.2 at a pressure above the critical pressure of the extraction agent.