David B Stern

US Patent:

20030038058, Feb 27, 2003

Filed:

Aug 2, 2002

Appl. No.:

10/211202

Inventors:

Madhav Acharya - New Castle DE, US
Jeffrey Beck - Burlington NJ, US
Robert Crane - Monroeville NJ, US
Arthur Chester - Cherry Hill NJ, US
Vinaya Kapoor - Kirkwood Voorhees NJ, US
Richard Kovacs - Mantua NJ, US
David Stern - Mount Laurel NJ, US

International Classification:

C10G035/06

US Classification:

208/135000

Abstract:

This is a process for upgrading a petroleum naphtha fraction. The naphtha is subjected to reforming and the reformate is cascaded to a benzene and toluene synthesis zone over a benzene and toluene synthesis catalyst comprising a molecular sieve of low acid activity. The preferred molecular sieve is steamed ZSM-5. The benzene and toluene synthesis zone is operated under conditions compatible with the conditions of the reformer such as temperatures of above about 800 F. (427 C.). In one aspect on the invention, the benzene and toluene synthesis catalyst includes a metal hydrogenation component from group VII(B), specifically rhenium. In one mode of operation, the benzene and toluene synthesis catalyst replaces at least a portion of the catalyst in the reformer. The process produces a product containing an increased proportion of benzene, toluene, and/or xylenes, and a reduced portion of alkylated aromatics, as compared to reformate.

US Patent:

57414696, Apr 21, 1998

Filed:

Oct 4, 1996

Appl. No.:

8/727843

Inventors:

Nazeer A. Bhore - Wilmington DE
David L. Johnson - Glen Mills PA
Khushrav E. Nariman - Lawrenceville NJ
David L. Stern - Princeton NJ

Assignee:

Mobil Oil Corporation - Fairfax VA

International Classification:

B01J 800
C01B 700

US Classification:

42324401

Abstract:

A dry, regenerable solid oxide process directed to convert SO. sub. x from the flue gas stream from a power plant, a coal or oil-fired plant or process heat furnace, or an FCC regenerator to elemental sulfur without using a Claus unit, a hydrogen plant, a regeneration gas separation system, or a hydrogenation section. This dry, regenerable solid oxide process is also effective on Claus plant tail-gas. This process uses solid oxides, such as, for example, magnesium aluminates or spinels to remove sulfur oxides from flue gas streams. The solid oxide is then regenerated by a reducing gas to release the sulfur compounds contained on the solid oxide to produce a gas stream comprising hydrogen sulfide, sulfur oxides and elemental sulfur. The elemental sulfur is then condensed and recovered as a product and the resulting gas stream may be recycled to be reprocessed over the solid oxide.