Stephen G Nelson

US Patent:

6413016, Jul 2, 2002

Filed:

Aug 17, 2000

Appl. No.:

09/640598

Inventors:

Stephen Richard Nelson - Edmond OK
Gregory Robert Feegle - Oklahoma City OK

Assignee:

Kerr-McGee Corporation - Oklahoma City OK

International Classification:

B09C 106

US Classification:

40512835, 166261, 1662721, 166370, 210747, 210908, 4051284, 588230, 588249

Abstract:

Methods of extracting liquid hydrocarbon contaminants from underground zones are provided. The methods are basically comprised of the steps of introducing a hot purge gas into an underground zone containing a pool of liquid hydrocarbon contaminants whereby light liquid hydrocarbons in and around the pool are evaporated and dense liquid hydrocarbons in the pool are evaporated to some extent, charred, auto-ignited and combusted, and removing the hot purge gas, the evaporated light liquid hydrocarbons and combustion gases from the combustion of the dense liquid hydrocarbons in the zone.

US Patent:

50097725, Apr 23, 1991

Filed:

Feb 27, 1989

Appl. No.:

7/315489

Inventors:

Stephen R. Nelson - Edmond OK
Richard L. Hood - Edmond OK

Assignee:

Kerr-McGee Corporation - Oklahoma City OK

International Classification:

C10C 308

US Classification:

208309

Abstract:

A solvent extraction process for separating a heavy hydrocarbon feedstock material into its various component parts. The process comprises the utilization of pressure reduction to enhance the separation and recovery of a deasphalted oil product comprising substantially the lower molecular weight hydrocarbon components present in the original heavy hydrocarbon feedstock material.

US Patent:

52718514, Dec 21, 1993

Filed:

Mar 8, 1993

Appl. No.:

8/027879

Inventors:

Stephen R. Nelson - Edmond OK
Alan M. Claude - Edmond OK

Assignee:

Kerr-McGee Corporation - Oklahoma City OK

International Classification:

B01D 2901

US Classification:

210770

Abstract:

A process for the treatment of refinery oily sludges to produce an oily fraction that is reprocessed in the refinery into (i) salable products and (ii) a solid residue meeting environmental regulatory agency requirements for disposal in non-hazardous solid waste landfills. The process includes mixing the refinery oily sludge with a particulate filter aid and preferably a single solvent selected from refinery intermediate and product streams and contacting this mixture with plate filters in a closed filter vessel. A cake residue forms on the filter plates and a filtrate mixture of oil, water and solvent is produced. The filtrate is separated into an oily fraction and a water fraction. The oily fraction is rerouted to refinery operating units for processing into salable products. The water fraction is routed to a refinery water treatment system.

US Patent:

46665625, May 19, 1987

Filed:

Sep 27, 1982

Appl. No.:

6/424393

Inventors:

Stephen R. Nelson - Edmond OK

Assignee:

Kerr-McGee Refining Corporation - Oklahoma City OK

International Classification:

B01D 306
B01D 338
C10G 700

US Classification:

203 93

Abstract:

A method of recovering light organic solvent from a liquid mixture containing the solvent and a process material, such as asphaltenes or coal liquefaction products. The solvent-process material mixture is treated in a solvent separation zone to separate a first vapor phase rich in solvent and a first liquid phase rich in process material. At least a portion of the liquid in the solvent separation zone is transferred to a mixing zone, where the liquid is intimately contacted with steam, under shearing conditions. The steam-liquid phase mixture thus produced is returned to the solvent separation zone and treated to separate a second vapor phase, rich in steam and solvent, and a second liquid phase, rich in process material and substantially depleted of solvent. Solvent is recovered from the first and second vapor phases.

US Patent:

44798750, Oct 30, 1984

Filed:

Aug 31, 1983

Appl. No.:

6/528145

Inventors:

Stephen R. Nelson - Edmond OK

Assignee:

Kerr-McGee Refining Corporation - Oklahoma City OK

International Classification:

C02F 1702

US Classification:

210519

Abstract:

Apparatus for mounting in a fluid separation zone for improving the separation of fluids of different densities. The apparatus includes a distributor mounted within the separation zone provided with fluid openings having packing means disposed thereabout.

US Patent:

45029440, Mar 5, 1985

Filed:

Sep 27, 1982

Appl. No.:

6/424290

Inventors:

Stephen R. Nelson - Edmond OK

Assignee:

Kerr-McGee Refining Corporation - Oklahoma City OK

International Classification:

C10C 118
C10C 308

US Classification:

208 45

Abstract:

A method of separating a process material comprising oils, resins and asphaltenes into at least three fractions. The process material is mixed in a mixing zone with a solvent selected from the group consisting of paraffinic hydrocarbons having between about 3 and about 8 carbon atoms. The process material-solvent mixture is introduced into a first separation zone to form an asphaltene-rich first heavy fraction and a resin-rich intermediate fraction, separated by a first liquid-liquid interface, and to form a first light fraction, rich in solvent and oils, separated from the intermediate fraction by a second liquid-liquid interface. The first heavy fraction and the intermediate fraction are withdrawn from the first separation zone. The first light fraction is introduced into a second separation zone to separate a second heavy fraction, rich in oils, and a second light fraction, rich in solvent.