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. 02, 1987
Filed:
Nov. 25, 1985
Richard E De Simone, Lisle, IL (US);
Muin S Haddad, Naperville, IL (US);
Amoco Corporation, Chicago, IL (US);
Abstract
Described are catalyst compositions comprising a HAMS-1B crystalline borosilicate molecular sieve, the majority of the crystallites of which are between about 1 micron and about 15 micron in largest diameter, incorporated into an inorganic matrix, which have been impregnated with a small amount of a magnesium compound, said impregnated compositions having improved para-selectively for toluene methylation to xylene. Such impregnated compositions, when used for the methylation of toluene using methanol or dimethylether, yield a xylene product containing a very high proportion of the para isomer compared to corresponding unimpregnated or magnesium compound-impregnated borosilicate-based compositions containing standard size (0.2.mu. to 0.5.mu.) borosilicate molecular sieve crystallites.