RICHARD A STOLTZ
Engineers in Murrysville, PA

5021401, Jun 4, 1991

Apr 3, 1989

7/331768

Thomas S. Snyder - Oakmont PA
Richard A. Stoltz - Murrysville PA
George R. Wagner - Murrysville PA

Westinghouse Electric Corp. - Pittsburgh PA

C23C 812, C23C 880, C23C 1616

505 1

This is a process for fabrication of nickel-oxide insulation on a superconductor. The process utilizes; reacting oxygen-free nickel powder with oxygen-free carbon monoxide generally at 50. degree. -75. degree. C. to produce a nickel carbonyl, separating the nickel carbonyl from reaction by-products and excess reagents by cooling the carbonyl and decanting the nickel carbonyl liquor, and contacting the carbonyl to a surface of a wire containing superconductor or superconductor precursors in an atmosphere containing a controlled amount of oxygen, with the wire at 50. degree. -800. degree. C. to produce nickel suboxide insulation on the wire. The purified nickel carbonyl and oxygen may be alternately (rather than simultaneously) introduced, to deposit a series of metallic nickel films on the wire, each of which metallic films are then oxidized to a nickel suboxide. The superconductor may be a niobium-tin superconductor, and the carbonyl contacted to wire containing unreacted niobium and tin at a wire temperature between 50. degree. -500. degree. C. to coat the wire with the nickel suboxide, and final forming of the wire done after the coating of wire and the niobium and the tin are reaction annealed after the final forming of the wire.

4167213, Sep 11, 1979

Jul 17, 1978

5/925064

Richard A. Stoltz - Murrysville PA
Albert C. Metrailer - Broken Arrow OK

Standard Oil Company (Indiana) - Chicago IL

E21B 4324, E21B 4712

166251

A passive method for locating the position and inclination of a flame front, within an oil-shale retort of known dimensions and location during an in situ combustion of the retort involving detecting the sound generated by the flame front, by two matched detectors separated by a fixed known distance. The pair of matched detectors are suspended vertically in a liquid-filled well which was drilled essentially parallel to the side wall of the retort. The outputs of the two detectors are fed directly to a differential amplifier and the resulting difference signal is monitored as a function of depth as the pair of detectors are raised and/or lowered in the well. The minimum in this signal corresponds to the position of the flame front within the retort. Repeated measurements in various observation wells establish the inclination of the flame front.

4865694, Sep 12, 1989

Sep 12, 1988

7/242571

Thomas S. Snyder - Oakmont PA
Richard A. Stoltz - Murrysville PA
David F. McLaughlin - Oakmont PA

Westinghouse Electric Corp. - Pittsburgh PA

B01D 300, C01G 2504, C01G 2704, C22B 3414

203 29

This is an improved method for separating hafnium from zirconium of the type where a complex of zirconium and hafnium chlorides and phosphorus oxychloride is prepared from zirconium-hafnium chloride and the complex is introduced into a distillation column, with the improvement comprising: electrochemical breaking of the zirconium of hafnium chloride complex taken from said distillation column to separate product from the complex. The electrochemical breaking of the complex, possibly by reducing zirconium or hafnium, is done in a molten salt bath. Preferably, the molten salt in said molten salt bath consists principally of a mixture of alkali metal and alkaline earth metal chlorides and zirconium or hafnium chloride. The product can be either chloride, metal, or mixed metal and subchloride for further processing.

4865695, Sep 12, 1989

Sep 12, 1988

7/242572

Thomas S. Snyder - Oakmont PA
Richard A. Stoltz - Murrysville PA

Westinghouse Electric Corp. - Pittsburgh PA

B01D 332, C01G 2504, C01G 2704

203 29

This is a method for molten salt systems related to distillation for zirconium-hafnium separation and prevents buildup of iron chloride by electrochemically reducing iron from the molten salt to give very low levels of iron chloride in the distillation column, to reduce corrosion, improve the product and, in some cases, to allow the molten salt system to be run continuously. The improvement comprises electrochemical purification of molten salt containing zirconium-hafnium chloride either, prior to introduction of the zirconium-hafnium chloride into a distillation column, or after introduction, or both, to substantially eliminate iron chloride from the zirconium-hafnium chloride. The molten salt during the electrochemical purification consists essentially of a mixture of chlorides of alkali metals, alkaline earth metals, zirconium, hafnium, aluminum, manganese, and/or zinc.

4900536, Feb 13, 1990

Nov 16, 1987

7/121016

Thomas S. Snyder - Oakmont PA
Richard A. Stoltz - Murrysville PA

Westinghouse Electric Corp. - Pittsburgh PA

C01F 1700

423593

This is a process for making precursors for ceramic superconductor. It utilizes fluidized bed chlorination of a rare earth ore (e. g. xenotime or monazite) a separation of yttrium chloride by differential condensation at 725. degree. -1200. degree. C. and reaction with an alkali metal alkoxide to produce yttrium alkoxide for mixing with alkoxide of other non-oxygen constituents of the superconductor for producing an alkoxide composite for processing into the superconductor.

4923579, May 8, 1990

Sep 12, 1988

7/242573

Thomas S. Snyder - Oakmont PA
Richard A. Stoltz - Murrysville PA
David Zuckerbrod - Pittsburgh PA

Westinghouse Electric Corp. - Pittsburgh PA

C25F 500

204140

A major cost component for zirconium alloy manufacture and fabrication is metal scrap generation during fabrication. This scrap, which has already incurred the entire process conversion cost from zircon sand to metal refining, constitutes an expensive cost to the fabrication process. The present invention teaches that these alloy scraps may be separated into their components by molten salt electrolysis using FLINAK electrolyte. The alloy components are recycled directly to the alloying process as cathodic grade metals, saving the cost of completely repeating the zircon conversion process.

4737244, Apr 12, 1988

Dec 18, 1986

6/943030

David F. McLaughlin - Oakmont PA
Richard A. Stoltz - Murrysville PA

Westinghouse Electric Corp. - Pittsburgh PA

B01D 340, C01G 2504, C01G 2704

203 51

This is a molten salt extractive distillation process for separating hafnium from zirconium. It utilizes at least principally a ZnCl. sub. 2 -PbCl. sub. 2 molten salt solvent, and preferably ZnCl. sub. 2 -PbCl. sub. 2 in a near eutectic or eutectic mixture. The extraction column is preferably run about 370. degree. -390. degree. C. at about one atomosphere and stripping is preferably done at 375. degree. -400. degree. C. utilizing an inert gas carrier.