Catalytic reforming process

US4440628A · kind A · utility

Assignee

• Exxon Research and Engineering Company · US

Inventors

• William E. Winter · Baton Rouge, US
• Gerald E. Markley · Baton Rouge, US

Key dates

• Filing date: Apr 6, 1983
• Grant date: Apr 3, 1984
• Expiry date: Apr 6, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/6567
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process wherein, in a series of reforming zones, or reactors, each of which contains a bed, or beds of catalyst, the catalyst in the rearward most reforming zones is constituted of a high rhenium, platinum rhenium catalyst, viz., a catalyst comprising supported platinum and a relatively high concentration of rhenium relative to the platinum, and preferably the catalyst in the forwardmost reforming zone, or reactor of the series, is constituted of platinum, or platinum and a relatively low concentration of rhenium relative to the platinum. At least 30 percent, preferably from 40 percent to about 90 percent, of the rearward most reactors of the unit, or even 100 percent, based on the total weight of the catalyst in all of the reactors of the unit, contain a high rhenium, platinum rhenium catalyst, the weight ratio of rhenium:platinum being at least about 1.5:1. The beds of catalyst are contacted with a hydrocarbon or naphtha feed, and hydrogen, and the reaction continued for a period of at least 700 hours, preferably from about 700 hours to about 2750 hours, while conducting the reaction at temperatures ranging from about 850.degree. F. to about 950.degree. F. (E.I.T.), at pressure…