ROBERT E LEONARD, M.D.
Medical Practice at Stanton L Young Blvd, Oklahoma City, OK

4153538, May 8, 1979

Mar 20, 1978

5/888299

Robert E. Leonard - Oklahoma City OK
Donald E. Rhodes - Oklahoma City OK

Kerr-McGee Corporation - Oklahoma City OK

C10G 2114

208177

A process for maintaining the fluid-like properties of a heavy phase being withdrawn from a separation zone maintained at elevated temperature and pressure during periods in which the flow of this heavy phase is terminated due to pressure reduction valve plugging or to permit cleaning of downstream processing apparatus. When the flow of withdrawn heavy phase is interrupted, deashed coal is melted, if necessary, and introduced under pressure into the withdrawal conduit to mix with the heavy phase therein. The mixture of deashed coal and heavy phase retains the fluid-like properties exhibited by the heavy phase and flow can be resumed once the downstream apparatus is repaired. Alternatively, other high-boiling aromatic materials may be used instead of the deashed coal.

4164466, Aug 14, 1979

Mar 20, 1978

5/888284

Roger A. Baldwin - Warr Acres OK
Robert E. Davis - Oklahoma City OK
Robert E. Leonard - Oklahoma City OK
Donald E. Rhodes - Oklahoma City OK

Kerr-McGee Corporation - Oklahoma City OK

C10G 104, C10G 2920

208177

A coal deashing process wherein a feed mixture comprising soluble coal products, insoluble coal products and solvent is separated in a first separation zone into a first heavy phase and a first light phase comprising soluble coal products, solvent and some insoluble coal products. The first light phase is withdrawn and introduced into a second separation zone wherein it separates into a second heavy phase comprising insoluble coal products, soluble coal products and some solvent and a second light phase comprising soluble coal products and solvent. The second heavy phase is withdrawn and at least a portion is recycled to the first separation zone to increase the yield of separable soluble coal products ultimately recovered by the process. In alternate embodiments, additional solvent can be added to the first light phase before introduction into the second separation zone or the recycled portion of the second heavy phase may be introduced into a treatment zone before reintroduction into the first separation zone. The treatment zone effects an increase in the molecular weight of at least a portion of the recycled second heavy phase which facilitates subsequent separation in the first separation zone.

5125230, Jun 30, 1992

Jan 16, 1991

7/641948

Robert E. Leonard - Oklahoma City OK

Kerr-McGee Coal Corporation

F01N 302

60274

A method and apparatus for removing soot from an exhaust gas stream wherein the exhaust gas stream is contacted with water to provide a substantially water saturated exhaust gas stream, particles and droplets in the water saturated gas stream then are electrically charged to produce a gas stream containing electrically charged particles and droplets, and an electric field is established for electrostatically attracting and de-entraining soot and soot containing water droplets from the gas stream containing electrically charged particles and droplets to provide a substantially soot free exhaust gas stream. The present invention includes a precipitator wherein the insulators are positioned in low dew point relatively clean locations and, in one embodiment, includes the use of the exhaust gas stream to maintain the temperature level of the insulators above dew point. In one other embodiment, the condensate produced as a result of electrostatically attracting and de-entraining soot and soot containing water droplets from the exhaust gas stream containing electrically charged particles and droplets is recirculated and used as part of the water for contacting the exhaust gas stream.

5300273, Apr 5, 1994

Dec 3, 1992

7/985526

Robert E. Leonard - Oklahoma City OK

Kerr-McGee Chemical Corporation - Oklahoma City OK

C01G 2302, C01F 748

423492

An improved process is provided for producing titanium tetrachloride vapor admixed with a desired particular amount of aluminum trichloride vapor for use in the production of rutile titanium dioxide. The vapor mixture is derived from a titanium tetrachloride solution containing the desired particular amount of aluminum trichloride. The solution is produced continuously by dissolving aluminum trichloride in a heated stream of liquid titanium tetrachloride utilizing a cyclic aluminum trichloride bed switching and recharging process.

4249951, Feb 10, 1981

Sep 7, 1979

6/073469

Robert E. Leonard - Oklahoma City OK

Kerr-McGee Corporation - Oklahoma City OK

C04B 736

106103

A process for utilizing mineral-containing residue from coal liquefaction processes to produce a hydraulic cement. The residue is mixed with siliceous and calcareous matereals and compacted. The compacted solids are introduced into a kiln and fired to produce hydraulic cement clinker. The primary fuel for the clinker production is contained in the residue. The clinker is removed from the kiln and ground to produce cement.

4162957, Jul 31, 1979

Mar 20, 1978

5/888283

Robert E. Leonard - Oklahoma City OK

Kerr-McGee Corporation - Oklahoma City OK

C10G 100

208 8R

The present invention relates to a process wherein solidified coal liquefaction products with or without other solid materials can be simultaneously melted and introduced at an elevated pressure into a process unit. The melting and introduction of the coal liquefaction products with or without other solid materials into the process unit is accomplished by an extruder.

4668539, May 26, 1987

Dec 30, 1985

6/814253

Robert E. Leonard - Oklahoma City OK
William H. Lamansky - Oklahoma City OK

Kerr-McGee Chemical Corporation - Oklahoma City OK

B27K 302, B05D 118

427298

The present invention relates to improvements in impregnated wood preserving processes utilizing naphthalene containing preservative agents comprising recovering that portion of the naphthalene stripped from the preservative agent during a drying phase in the process and returning said recovered naphthalene portion to the impregnation phase of said process.

4090958, May 23, 1978

Feb 23, 1976

5/660334

Robert Edward Leonard - Oklahoma City OK

Kerr-McGee Corporation - Oklahoma City OK

B01D 2100

210 54

An improved coal processing system wherein a feed mixture (including coal, dissolving solvent, insoluble coal products and soluble coal products) at a first temperature level is separated in a first separation zone into a heavy fraction including the insoluble coal products and a light fraction and, thereafter, the heavy fraction is withdrawn from the first separation zone and heated to a second temperature level higher than the first temperature level and in which the second temperature level is sufficiently high to produce a heavy fraction that is flowable.