Thomas Joseph Stark

US Patent:

54099609, Apr 25, 1995

Filed:

Jun 15, 1994

Appl. No.:

8/259952

Inventors:

Thomas M. Stark - Morristown NJ

Assignee:

Exxon Research and Engineering Company - Florham Park NJ

International Classification:

C07C 104
C07C 106

US Classification:

518700

Abstract:

Pentane (or similar light hydrocarbon) is used in a gas conversion process to consume the exothermic heat of reaction in the Fischer-Tropsch process, and expanded to produce the energy to drive the air plant compressors.

US Patent:

39574733, May 18, 1976

Filed:

Sep 9, 1974

Appl. No.:

5/504105

Inventors:

Thomas M. Stark - Morristown NJ
Sheldon Bodnick - Rockaway NJ

International Classification:

F25J 302

US Classification:

62 9

Abstract:

A process for cooling and condensing natural gas in a plurality of convective heat exchange stages by means of multicomponent refrigerants. The first refrigerant cools the natural gas and the second refrigerant from ambient temperature in a first heat exchange stage. Then the second refrigerant cools the natural gas further in a second stage and afterward is compressed while still below ambient temperature to an intermediate pressure where it is joined by the first refrigerant for further compression and cooling to ambient temperature before separating the two refrigerants and repeating the refrigeration cycle.

US Patent:

41672445, Sep 11, 1979

Filed:

Nov 11, 1976

Appl. No.:

5/741153

Inventors:

Thomas M. Stark - Morristown NJ

Assignee:

Exxon Nuclear Company, Inc. - Bellevue WA

International Classification:

B04B 508
B01D 4512

US Classification:

233 18

Abstract:

An invention involving a process and apparatus for isotope-separation applications such as uranium-isotope enrichment is disclosed which employs cascades of gas centrifuges. A preferred apparatus relates to an isotope-enrichment unit which includes a first group of cascades of gas centrifuges and an auxiliary cascade. Each cascade has an input, a light-fraction output, and a heavy-fraction output for separating a gaseous-mixture feed including a compound of a light nuclear isotope and a compound of a heavy nuclear isotope into light and heavy fractions respectively enriched and depleted in the light isotope. The cascades of the first group have at least one enriching stage and at least one stripping stage. An example of such a gaseous mixture is uranium hexafluoride incorporating uranium-235 and uranium-238. The unit further includes means for introducing a gaseous-mixture feedstock into each input of the first group of cascades, means for withdrawing at least a portion of a product fraction from the light-fraction outputs of the first group of cascades, and means for withdrawing at least a portion of a waste fraction from the heavy-fraction outputs of the first group of cascades.