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:
Jun. 22, 1993
Filed:
Dec. 20, 1991
Philippe Jaeger, Salindres, FR;
Olivier Legendre, Herblay, FR;
Rhone-Poulenc Chimie, Courbevoie, FR;
Abstract
Coated catalyst particulates, well adopted for the oxidation of olefins into .alpha.,.beta.-unsaturated aldehydes, e.g., for the oxidation of propylene into acrolein, and the coating layer of which comprising a catalytically active phase including a catalytically effective amount of bismuth and iron molybdate and dopant amounts of phosphorus and potassium, are prepared by providing a calcined and ground catalytically active intermediate composition devoid of phosphorus and potassium values, coating this intermediate composition onto a particulate support substrate comprising rough-surfaced inert and solid spheres, also coating phosphorus and potassium values onto the particulate support substrate, and then calcining the support particulates thus coated.