Amorphous silica-alumina composition and method for making the same

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12215036
APP PUB NO 20230348289A1
SERIAL NO

18344530

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Abstract

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A process of making a silica-alumina composition having improved properties is provided. The process includes (a) mixing an aqueous solution of a silicon compound and an aqueous solution of an aluminum compound and an acid, while maintaining a pH of the mixed solution in a range of 1 to 3, and obtaining an acidified silica-alumina sol; (b) adding an aqueous solution of a base precipitating agent to the acidified silica-alumina sol to a final pH in a range of 5 to 8, and co-precipitating a silica-alumina slurry, wherein the base precipitating agent is selected from ammonium carbonate, ammonium bicarbonate, and any combination thereof; (c) optionally, hydrothermally aging the silica-alumina slurry to form a hydrothermally aged silica-alumina slurry; and (d) recovering a precipitate solid from the silica-alumina slurry or the hydrothermally aged silica-alumina slurry, wherein the precipitate solid comprises the silica-alumina composition.

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Patent Owner(s)

  • CHEVRON U.S.A. INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jothimurugesan, Kandaswamy Hercules, US 58 675
Timken, Hye-Kyung Albany, US 44 536

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