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:
Mar. 23, 2004
Filed:
Feb. 07, 2002
Applicant:
Inventors:
Dennis Stamires, Newport Beach, CA (US);
William Jones, Cambridge, GB;
Paul O'Connor, Hoevelaken, NL;
Assignee:
Akzo Nobel nv, , NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 2/116 ;
U.S. Cl.
CPC ...
B01J 2/116 ;
Abstract
This invention relates to a process for the preparation of anionic clay and boehmite-containing compositions. These compositions may also contain unreacted trivalent metal source and/or divalent metal source. The process involves subjecting a precursor mixture comprising a divalent metal source and a trivalent metal source to at least two aging steps, wherein at least once between two aging steps an aluminum source is added. An advantage of the invention is that the crystallinity of the boehmite in the composition can be tuned.