H.c. Starck Gmbh

Orchard Material Technology, LLC

Other

Leah F. Simkins

Leonid Natan Shekhter

Hugh P. Greville

Leonid Lanin

Steven Alfred Miller

Leonid L Lanin

Terrance B Tripp

Mark E Gaydos

Howard V Goldberg

Anastasia M Conlon

Stefan Zimmerman

Gokce Gulsoy

Stefan Zimmermann

Rong-Chein Richard Wu

Lawrence F McHugh

Leah F Simkins

Esra Cankaya-Yalcin

Leah F Haywiser

Daniel G Gribbin

Joseph D Lessard

Karlheinz Reichert

Edward V McCormick

Oliver Thomas

Robert A Dorvel

Ross W Simon

Anastasis M Conlon

Yuri V Blagoveshchenskiy

Hugh P Greville

Edward K Schiele

Joachim Vieregge

Larry F McHugh

Copper is produced by a looping oxidizing process wherein oxidation of copper sulfide concentrate to molten blister copper by conversion with copper oxides (and optionally oxygen from air) in a one step, molten bath operation to produce molten blister copper, iron oxide slag, and rich SOoff gas. The blister copper is treated in an anode furnace to reduce the iron content and oxidize residual sulfur, and prepare it for either electrolysis or reoxidation.

Production of copper via looping oxidation process

Recovery of a metal from scrap materials or other source materials containing two or more metals or other materials by iodization of the materials or parts of them to create multiple metal iodides of respective metals, separating the iodides and dissociating at least one of the iodides to recover its metal component.

Retrieval of high value refractory metals from alloys and mixtures

A looping method for production of MoO, the method including reacting molybdenite feed with a substantially stoichiometric mixture comprising MoOand oxygen in a first furnace to produce MoOand SO, removing a first portion of the MoOfrom the first furnace, transferring a second portion of the MoOfrom the first furnace to a second furnace, reoxidizing of the transferred portion of the MoOin the second furnace to MoO; and looping the MoOfrom the second furnace to the first furnace for use as an oxidizing agent.

Sulfide oxidation process for production of molybdenum oxides from molybdenite

In various embodiments, protective layers are bonded to a steel layer, overlapped, and at least partially covered by a layer of unmelted metal powder produced by cold spray.

Methods of joining metallic protective layers

Refractory metal powders are dehydrided in a device which includes a preheat chamber for retaining the metal powder fully heated in a hot zone to allow diffusion of hydrogen out of the powder. The powder is cooled in a cooling chamber for a residence time sufficiently short to prevent re-absorption of the hydrogen by the powder. The powder is consolidated by impact on a substrate at the exit of the cooling chamber to build a deposit in solid dense form on the substrate.

Dynamic dehydriding of refractory metal powders

In various embodiments, protective layers are bonded to a steel layer and connected by a layer of unmelted metal powder produced by cold spray.

In various embodiments, low-oxygen metal powder is produced by heating a metal powder to a temperature at which an oxide of the metal powder becomes thermodynamically unstable and applying a pressure to volatilize the oxygen.

Process for preparing metal powders having low oxygen content, powders so-produced and uses thereof

Refractory metal powders are dehydrided in a device which includes a preheat chamber for retaining the metal powder fully heated in a hot zone to allow diffusion of hydrogen out of the powder. The powder is cooled in a cooling chamber for a residence time sufficiently short to prevent re-absorbtion of the hydrogen by the powder. The powder is consolidated by impact on a substrate at the exit of the cooling chamber to build a deposit in solid dense form on the substrate.

The present invention is directed to a process for the preparation of a metal powder having a purity at least as high as the starting powder and having an oxygen content of 10 ppm or less comprising heating said metal powder containing oxygen in the form of an oxide, with the total oxygen content being from 50 to 3000 ppmf in an inert atmosphere at a pressure of from 1 bar to 10to a temperature at which the oxide of the metal powder becomes thermodynamically unstable and removing the resulting oxygen via volatilization. The metal powder is preferably selected from the group consisting of tantalum, niobium, molybdenum, hafnium, zirconium, titanium, vanadium, rhenium and tungsten. The invention also relates to the powders produced by the process and the use of such powders in a cold spray process.

In various embodiments, a metallic structure includes first and second clad structures each comprising a protective layer disposed over a steel layer, a joint joining the steel layers of first and second clad structures, and, directly connecting the protective layers of the first and second clad structures, a layer of metal powder disposed in contact with (i) the joint, (ii) the protective layers of the first and second clad structures, and (iii) a portion of at least one of the steel layers proximate the joint.

Protective metal-clad structures

In various embodiments, a method of joining clad structures includes providing first and second clad structures each comprising a protective layer disposed only partially over a steel layer such that an edge region of the steel layer is exposed, joining the first and second clad structures at their respective edge regions, thereby forming a joint, and cold spraying a metal powder over and in contact with (i) the joint, (ii) the edge regions, and (iii) the protective layers of the first and second clad structures, thereby directly connecting the protective layers of the first and second clad structures with a layer of unmelted metal powder.

Methods of joining protective metal-clad structures

High purity refractory metals, valve metals, refractory metal oxides, valve metal oxides, or alloys thereof suitable for a variety of electrical, optical and mill product/fabricated parts usages are produced from their respective oxides by metalothermic reduction of a solid or liquid form of such oxide using a reducing agent that establishes (after ignition) a highly exothermic reaction, the reaction preferably taking place in a continuously or step-wise moving oxide such as gravity fall with metal retrievable at the bottom and an oxide of the reducing agent being removable as a gas or in other convenient form and unreacted reducing agent derivatives being removable by leaching or like process.

Metalothermic reduction of refractory metal oxides

A method of producing a refractory metal powder that includes providing a metal powder containing magnesium tantalate or magnesium niobate; and heating the powder in an inert atmosphere in the presence of magnesium, calcium and/or aluminum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder and/or heating the powder under vacuum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder, the heating steps being performed in any order. The metal powder can be formed into pellets at an appropriate sintering temperature, which can be formed into electrolytic capacitors.

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Ashland, MA, United States of America

Leonid Natan Shekhter