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:
Feb. 28, 1989
Filed:
Dec. 16, 1987
Margaret Nemet-Mavrodin, Cherry Hill, NJ (US);
Mobil Oil Corporation, New York, NY (US);
Abstract
A process is provided for converting a feedstock comprising a preponderant amount of C.sub.2 -C.sub.10 aliphatic compounds to a product having a high proportion of benzene in a two stage process, with the effluent from the first stage passing directly to the second stage, i.e., with no intermediate processing such as purification or separation. In the first stage, the feedstock is contacted under suitable conversion conditions with a catalyst comprising an aluminosilicate zeolite having a Constraint Index in the approximate range of 1 to 12 and a degree of acidity indicated by an alpha value of at least about 3. The effluent from the first stage is then passed directly to a second stage where it is contacted under conversion conditions with a catalyst comprising platinum and a zeolite which either has a Constraint Index of approximately 1 to 12 or is a potassium zeolite L in which the number of protonic acid sites have been reduced by exchange with barium, strontium or calcium, the second stage zeolite being substantially non- or low-acid as indicated by an alpha value no higher than about 1.