Stephen Richard Nelson
Engineers at Chaparral Ln, Edmond, OK

6413016, Jul 2, 2002

Aug 17, 2000

09/640598

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

Kerr-McGee Corporation - Oklahoma City OK

B09C 106

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

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.

5271851, Dec 21, 1993

Mar 8, 1993

8/027879

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

Kerr-McGee Corporation - Oklahoma City OK

B01D 2901

210770

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.

4502944, Mar 5, 1985

Sep 27, 1982

6/424290

Stephen R. Nelson - Edmond OK

Kerr-McGee Refining Corporation - Oklahoma City OK

C10C 118, C10C 308

208 45

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.

4666562, May 19, 1987

Sep 27, 1982

6/424393

Stephen R. Nelson - Edmond OK

Kerr-McGee Refining Corporation - Oklahoma City OK

B01D 306, B01D 338, C10G 700

203 93

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.

5009772, Apr 23, 1991

Feb 27, 1989

7/315489

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

Kerr-McGee Corporation - Oklahoma City OK

C10C 308

208309

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.

4479875, Oct 30, 1984

Aug 31, 1983

6/528145

Stephen R. Nelson - Edmond OK

Kerr-McGee Refining Corporation - Oklahoma City OK

C02F 1702

210519

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.