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. 02, 1976
Filed:
Apr. 25, 1974
Raymond A Franz, Baton Rouge, LA (US);
Gary D Madding, Evansville, IN (US);
Tao P Li, Chesterfield, MO (US);
Monsanto Company, St. Louis, MO (US);
Abstract
Styrene and benzene are simultaneously produced by heating a mixture of toluene and ethylbenzene in a mole ratio of at least 1:1 to a temperature from about 400.degree. to 900.degree.C at moderate pressures for a period of time up to about 15 seconds, cooling the reaction mixture quickly and recovering the styrene and benzene therefrom. Yields of both products can be improved by the addition of modifying agents such as benzenethiol or by conducting the reaction in the presence of a chromium-containing catalyst supported on an inorganic material which can be promoted by a compound of calcium, magnesium, copper or zinc.