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:
Jan. 21, 1986
Filed:
Dec. 05, 1983
Applicant:
Inventor:
Dean A Young, Yorba Linda, CA (US);
Assignee:
Union Oil Company of California, Los Angeles, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ;
U.S. Cl.
CPC ...
502214 ; 502244 ; 502256 ; 502259 ; 502262 ; 502263 ;
Abstract
Para-xylene is selectively prepared by reacting toluene and a methylating agent in the presence of a phosphorus modified catalyst comprising a silica polymorph intermixed with an inorganic refractory oxide, said catalyst having an alkali content of less than about 1.3 milliequivalents per gram as available alkali.