Robert L Hargis

US Patent:

41195043, Oct 10, 1978

Filed:

May 17, 1977

Appl. No.:

5/797775

Inventors:

Robert L. Hargis - Palestine TX

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C25C 300
C25C 310

US Classification:

204 64R

Abstract:

A method of preventing the conduction of electricity along a film of molten salt on a surface. An electrically insulating material which is not wet by the molten salt is interposed in the film. The material is in the form of a protrusion on the surface.

US Patent:

59019107, May 11, 1999

Filed:

Feb 7, 1997

Appl. No.:

8/797528

Inventors:

Philip Grosso - Auburn CA
Ralph Cheek - Los Altos Hills CA
Robert L. Hargis - Knoxville TN

Assignee:

IMCO Recycling, Inc. - Irving TX

International Classification:

B02C23/08

US Classification:

241 2414

Abstract:

A method for recovering aluminum metal from varied size clumps of salt cake. The salt cake clumps have varied concentrations of aluminum metal. The method includes steps of segregating the varied size clumps into smaller clumps and larger clumps, by size; separating, by aluminum metal concentration, the larger clumps into clumps of higher aluminum metal concentration and reject clumps of lower aluminum metal concentration; impacting the reject clumps to size-reduce the clumps to smaller reject clumps; returning the smaller reject clumps after impacting to the previous step of segregating; segregating the smaller clumps from the step of segregating into large clumps and small clumps, by size; separating, by aluminum metal concentration, the small clumps into clumps of higher aluminum metal concentration and second reject clumps of lower aluminum metal concentration; and separating the second reject clumps into clumps of higher aluminum metal concentration and third reject clumps of lower aluminum metal concentration. The steps of separating are each performed by magnetic repelling forces of eddy current separators. In the third separating step, the eddy current separator operates in conjunction with a splitter that collects high aluminum concentration pieces based on the trajectory of the pieces coming off the belt at the discharge rotor.

US Patent:

41013930, Jul 18, 1978

Filed:

Jun 22, 1977

Appl. No.:

5/808780

Inventors:

Robert L. Hargis - Palestine TX

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C25C 306

US Classification:

204 67

Abstract:

A method is provided for the controlled cleaning of aluminum chloride contaminated filtering means used in a system for recovery of gaseous effluents formed in the production of aluminum from aluminum chloride. The method includes transferring filtering units from the system to a cleaning vessel, placing them inside the vessel and sealing the vessel from the environment. Water is flowed into the lower portions of the vessel to immerse the units to cause the aluminum chloride to react with the water, giving off gaseous and liquid products of reaction. Gaseous materials are exhausted from the upper portion of the vessel to a fugitive gas system and the liquid products are discharged from a separate exhaust means. Filtering materials are then stripped from the units to be disposed of without polluting the environment. An apparatus is also provided for carrying out the method of the present invention.

US Patent:

40839265, Apr 11, 1978

Filed:

Feb 3, 1977

Appl. No.:

5/765291

Inventors:

Marlyn D. Ballain - Belleville IL
Roy E. Hardwick - Maryville TN
Robert L. Hargis - Palestine TX
Larry K. King - Maryville TN

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C01F 758
C01F 762

US Classification:

423135

Abstract:

Hot vapors of aluminum chloride and by-products produced in the chlorination of aluminous material to form aluminum chloride are cooled by contacting the vapors with solid aluminum chloride as the vapors exit from the reactor and before the vapors come in contact with filter materials. This cooling reduces the temperature of the vapors from an initial temperature of about 600. degree. -800. degree. C down to about 300. degree. -350. degree. C thereby preventing or inhibiting attack of the filter materials by the hot vapors.

US Patent:

41152140, Sep 19, 1978

Filed:

Jun 20, 1977

Appl. No.:

5/807963

Inventors:

Robert L. Hargis - Palestine TX

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C25C 300

US Classification:

204 64R

Abstract:

A method for exhausting a substance through a port in a lid of a chamber, comprising conducting the substance through a tube within the port, which tube is more resistant to corrosion by the substance than is the port, and supporting the tube on a support means extending into the interior of the port, while cooling the support means to a temperature such that it too is more resistant to corrosion by the substance than is the port. A cell lid having a metallic port, metallic protrusion means extending into the port, cooling means for extracting heat from the protrusion means, and a carbon or ceramic tube supported on the protrusion means.

US Patent:

41264320, Nov 21, 1978

Filed:

Jul 20, 1977

Appl. No.:

5/817336

Inventors:

Robert L. Hargis - Palestine TX

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

B01D 5300

US Classification:

55 71

Abstract:

A method of treating a gas containing liquid substance, including the steps of separating liquid substance from the gas, sending the gas from the separating step to a cooling step, then, in the cooling step, cooling the gas to a temperature below the onset of solidification in the liquid substance, wherein the improvement includes removing a remaining amount of liquid substance, which remains in the gas following the step of separating and which collects in the step of sending, before such remaining amount reaches the step of cooling and accumulates as solidified liquid in the cooling step, where it would contribute to a clogging of the cooling step.