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:
Nov. 29, 2022
Filed:
Aug. 11, 2017
Applicant:
Sasol (Usa) Corporation, Houston, TX (US);
Inventors:
Allison L. Hann, DeQuincy, LA (US);
Brian C. Peoples, Lake Charles, LA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F 7/141 (2022.01); C01F 7/026 (2022.01);
U.S. Cl.
CPC ...
C01F 7/141 (2013.01); C01F 7/026 (2013.01); C01P 2002/60 (2013.01); C01P 2006/22 (2013.01);
Abstract
A method of making an alumina including providing an alumina slurry, aging the slurry, adding a tricarboxylic acid to the aged alumina slurry, further aging the slurry, and spray drying, the method being characterized by the addition of a dicarboxylic acid either at the same time as the tricarboxylic acid, or after the second aging and before the spray drying. The resulting alumina is dispersible at a pH greater than 9.5 above 95% and has a viscosity below 0.4 Pa·S for 10 wt % sols.