Robert E Rapp

US Patent:

20020125125, Sep 12, 2002

Filed:

Mar 6, 2001

Appl. No.:

09/800140

Inventors:

Robert Rapp - Columbus OH, US

International Classification:

C25B011/04

US Classification:

204/243100, 204/291000

Abstract:

The present invention provides an improved TiBcathode for use in aluminum production cells for the electrolysis of alumina dissolved in a cryolite-based molten electrolyte and an improved electrolytic cell for producing aluminum. The cathode is a monolithic, porous, TiBbody having a continuous porosity and interconnected pores substantially throughout.

US Patent:

59171146, Jun 29, 1999

Filed:

Oct 31, 1997

Appl. No.:

8/961977

Inventors:

Robert A. Rapp - Columbus OH

Assignee:

The Ohio State University - Columbus OH

International Classification:

C22B 905

US Classification:

75379

Abstract:

Offgas recycling processes, including an argon degassing embodiment which cyclically regenerates one treatment flow path while the other treatment flow path is treating the offgas. The system is changed into a second mode to regenerate the previously treating portion of the system while the offgas is being treated by the previously regenerated treatment device. A second embodiment oxidizes a copper chloride bed to release chlorine, which is injected into the melt. The offgas contains chlorine and HCl, which react with a second bed, containing oxides of copper, forming copper chloride. Water vapor and nitrogen are exhausted to the environment. Before the beds are fully reacted, the flow of gas through the beds is reversed, oxidizing the CuCl bed and reducing the copper oxides.

US Patent:

44682999, Aug 28, 1984

Filed:

Dec 20, 1982

Appl. No.:

6/451071

Inventors:

Stephen C. Byrne - Monroeville PA
Siba P. Ray - Pittsburgh PA
Robert A. Rapp - Columbus OH

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C25C 300
C25C 304
C25C 326
C25C 312

US Classification:

204 60

Abstract:

A nonconsumable electrode assembly suitable for use in the production of metal by electrolytic reduction of a metal compound dissolved in a molten salt, the assembly comprising a metal conductor and a ceramic electrode body connected by a friction weld between a portion of the body having a level of free metal or metal alloy sufficient to effect such a friction weld and a portion of the metal conductor.

US Patent:

60398620, Mar 21, 2000

Filed:

Jun 24, 1999

Appl. No.:

9/339129

Inventors:

Robert A. Rapp - Columbus OH

Assignee:

The Ohio State University - Columbus OH

International Classification:

C25C 306

US Classification:

205386

Abstract:

The present invention includes a conceptually new process to produce primary aluminum through the modification/adaptation for the HHC of a non-consumable anode of the type used for solid oxide fuel cells (SOFC) with the provision to electrochemically utilize/burn a fuel. The present invention is believed to work most effectively when the dissolution and fragility problems of the zirconia-base solid electrolyte can be sufficiently alleviated, e. g. , through the use of a lower electrolysis temperature, through the use of melt additives to restrict dissolution, and/or through modem methods for the fabrication/deposition of the electrolyte onto an appropriate internal metal anode. The present invention thus achieves, through the use of the solid-electrolyte-coated anode, the long-sought non-consumable anode. The electrochemical oxidation, inside the NCA in accordance with the present invention, of an inexpensive fuel, e. g. , reformed natural gas (as is done in the modern SOFC), constitutes a significantly more favorable anodic oxidation reaction than the evolution of pure oxygen disclosed by Marincek.

US Patent:

44540159, Jun 12, 1984

Filed:

Sep 27, 1982

Appl. No.:

6/423673

Inventors:

Siba P. Ray - Plum Boro PA
Robert A. Rapp - Columbus OH

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C25C 300
C25B 1104

US Classification:

204293

Abstract:

An improved inert electrode composition is suitable for use as an inert electrode in the production of metals such as aluminum by the electrolytic reduction of metal oxide or metal salt dissolved in a molten salt bath. The composition comprises one or more metals or metal alloys and metal compounds which may include oxides of the metals comprising the alloy. The alloy and metal compounds are interwoven in a network which provides improved electrical conductivity and mechanical strength while preserving the level of chemical inertness necessary for such an electrode to function satisfactorily.

US Patent:

51028646, Apr 7, 1992

Filed:

Sep 10, 1990

Appl. No.:

7/580407

Inventors:

Robert A. Rapp - Columbus OH
Andrew W. Urquhart - Newark DE
Alan S. Nagelberg - Wilmington DE
Marc S. Newkirk - Newark DE

Assignee:

Lanxide Technology Company, LP - Newark DE

International Classification:

C04B 3500

US Classification:

505 1

Abstract:

A complex oxidation reaction product of two or more metals in an oxidized state is formed by positioning a suitable precursor metal adjacent to a permeable mass of a metal-containing compound in an oxidizing atmosphere and heating the assembly to form a body of molten precursor metal. The molten metal infiltrates the permeable mass and reacts therewith and with the oxidizing atmosphere to form a complex oxidation reaction product. Methods for determining the shape of the resulting article are described. The disclosed methods can be used to form superconducting perovskites.

US Patent:

54927277, Feb 20, 1996

Filed:

May 10, 1994

Appl. No.:

8/240350

Inventors:

Robert A. Rapp - Columbus OH
Ge Wang - Columbus OH
Endang Pangestuti - Columbus OH

Assignee:

The Ohio State University Research Foundation - Columbus OH

International Classification:

C23C 1600

US Classification:

427253

Abstract:

A method for the simultaneous deposition of chromium and silicon to form a diffusion coating on a workpiece uses a halide-activated cementation pack with a dual halide activator. Elemental metal powders may be employed with the dual activator. A two-step heating schedule prevents blocking a chromium carbide from forming at the surface of the workpiece. Small contents of either Ce or V can be added to the Cr+Si contents of the coating by introducing oxides of Ce or V into the filler of the pack.

US Patent:

49563386, Sep 11, 1990

Filed:

Jul 6, 1988

Appl. No.:

7/217105

Inventors:

Robert A. Rapp - Columbus OH
Andrew W. Urquhart - Newark DE
Alan S. Nagelberg - Newark DE
Marc S. Newkirk - Newark DE

Assignee:

Lanxide Technology Company, LP - Newark DE

International Classification:

C04B 3500

US Classification:

505 1

Abstract:

A complex oxidation reaction product of two or more metals in an oxidized state is formed by positioning a suitable precursor metal adjacent to a permeable mass of a metal-containing compound in an oxidizing atmosphere and heating the assembly to form a body of molten precursor metal. The molten metal infiltrates the permeable mass and reacts therewith and with the oxidizing atmosphere to form a complex oxidation reaction product. Methods for determining the shape of the resulting article are described. The disclosed methods can be used to form superconducting perovskites.