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. 08, 1994
Filed:
Apr. 27, 1993
Ralph M Dessau, Edison, NJ (US);
Mohsen N Harandi, Lawrenceville, NJ (US);
Mobil Oil Corporation, Fairfax, VA (US);
Abstract
A staged process has been discovered for the selective conversion of paraffins in naphtha to aromatics and conversion of naphthenes in naphtha to olefins. In a first stage, n-paraffins in naphtha are converted to aromatics over modified non acidic zeolite catalyst particles with a low conversion of naphthenes in the feedstream. The effluent from the first stage is cascaded to a second stage reactor containing acidic zeolite catalyst wherein naphthenes are converted to light olefins. Advantageously, the process of the invention results in a reduction in the production of light C.sub.1 -C.sub.4 paraffins compared to the prior art. The preferred catalyst for the first stage is a platinum modified zeolite containing tin.