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. 20, 1984
Filed:
Oct. 28, 1981
John T Brandenburg, Port Neches, TX (US);
John M Crone, Jr, Fishkill, NY (US);
Texaco Inc., White Plains, NY (US);
Abstract
An alumina catalyst, which has a desired porosity and surface area and is stable at high temperatures is formed by contacting a substrate with an alkali aluminate solution for a period of time sufficient to form an adherent film of hydrated alumina on the substrate, separating the substrate with the adherent film of hydrated alumina from the solution, heating the substrate and alumina film under calcining conditions until an alumina film of desired porosity and surface area is formed, and then contacting the calcined alumina film with a material which stabilizes the alumina during subsequent heating. Optionally, the alumina film can then be further calcined at a temperature higher than that used in the first calcining conditions, preferably at a temperature up to about 1260.degree. C. The stabilizing material can be one of several compounds including those of barium, silcon, and the rare earth metals. Further, dissolving the stabilizing material and a catalytic metal, such as platinum, into a solvent, and contacting this solution with the calcined alumina film produces a substantially even distribution of the catalytic metal on the calcined alumina film.