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. 16, 1979
Filed:
Dec. 02, 1977
Kenneth S Wheelock, Baton Rouge, LA (US);
Exxon Research & Engineering Co., Florham Park, NJ (US);
Abstract
The disclosure herein relates to (a) a process for the preparation of catalysts which are highly active for oxidizing the carbon monoxide (CO) and hydrocarbon (HC) present in automobile exhaust gases, with minimum oxidation of the sulfur dioxide, by controlling the acidity of the support, or carrier, within certain critical ranges while a Group VIII noble metal component, or components, is composited with said support in forming the catalyst; (b) a process embodying the use of the so-formed catalysts in the treatment of automotive exhaust gases; and, (c) the catalyst compositions so-formed from supports the surface acidity of which is controlled. In the formation of the catalysts the total surface acidity of the support on which the metal, or metals, component is deposited is maintained between about 0.01 to about 0.10 micromoles pyridine/m.sup.2, and the surface area of the metal, or metals, component ranges up to about 50 m.sup.2 /g, preferably from about 1 m.sup.2 /g to about 35 m.sup.2 /g, and more preferably from about 1 m.sup.2 /g to about 20 m.sup.2 /g.