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:
Oct. 05, 1993
Filed:
Dec. 20, 1991
Applicant:
Inventors:
Barry W Preston, Whiteford, MD (US);
John A Kosin, Bel Air, MD (US);
Claude R Andrews, Pasadena, MD (US);
Assignee:
J. M. Huber Corporation, Rumson, NJ (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ; C01F / ; A01N / ; A61K / ;
U.S. Cl.
CPC ...
423432 ; 4234202 ; 424686 ; 424688 ;
Abstract
An improved method for the production of synthetic hydrotalcites having high purity (99+%) and small particle size (<2 microns) is disclosed. This method used inexpensive and available reactants and is suitable for commercial scale production. A source of magnesium, such as magnesium hydroxide; a source of aluminum from a mixture of alumina trihydrate and an alkali metal aluminate; and a source of carbonate, such as sodium bicarbonate, are reacted under hydrothermal conditions at a temperature of between 160.degree.-200.degree. C. to produce synthetic hydrotalcite.