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:
May. 01, 1979
Filed:
Jan. 05, 1978
Setsuo Kamiyama, Ooi, JP;
Yukio Nagashima, Wako, JP;
Hiroshi Furukawa, Ooi, JP;
Katsumi Kaneko, Ooi, JP;
Toa Nenryo Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of stabilizing a catalyst for the conversion of aromatic hydrocarbons in the presence of hydrogen such as the isomerization of C.sub.8 aromatic hydrocarbons to increase the content of p-xylene, is carried out by contacting a catalyst in advance of start-up with hydrocarbons in the liquid phase at a temperature preferably of about 50.degree. to about 250.degree. C. and preferably at elevated pressure up to about 50 Kg/cm.sup.2 in the absence of hydrogen; the catalyst being prepared by the acid leaching of a hydrogen form mordenite to produce a mordenite having a silica to alumina molar ratio of about 15 to 21. Preferably, the hydrocarbons used for the contacting have the composition of the feed to be converted.