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John Joseph Barsa

Richard J Lagow

Edward T Farris

Paul J Capano

Carbothermic reduction of magnesium oxide at approximately 2200 degrees Kelvin yields a high temperature mixture of magnesium vapors and carbon monoxide gas. Previous processes have sought to cool or alter the mixture to cause the yield of pure magnesium, which is then used in subsequent processes for its reducing properties. The present invention takes advantage of the stability and inertness of carbon monoxide at elevated temperatures enabling the magnesium vapor/carbon monoxide gas mixture from the carbothermic process to be used directly for the production of other metals at high temperatures. For example, Chromium oxide or chloride, manganese oxide or chloride, zinc oxide or chloride or sulfide, and several other metal compounds can be reduced by the magnesium vapor/carbon monoxide gas mixture at temperatures high enough to prevent the gas mixture from back-reacting to magnesium oxide and carbon.

Method and apparatus for high temperature production of metals

Carbothermic reduction of magnesium oxide at approximately 2200 degrees Kelvin yields a high temperature mixture of magnesium vapors and carbon monoxide gas. Previous processes have sought to cool or alter the mixture to cause the yield of pure magnesium, which is then used in subsequent processes for its reducing properties. The present invention takes advantage of the stability and inertness of carbon monoxide at elevated temperatures enabling the magnesium vapor/carbon monoxide gas mixture from the carbothermic process to be used directly for the production of other metals at high temperatures. Chromium oxide, manganese oxide, zinc oxide and sulfide, and several other metal compounds can be reduced by the magnesium vapor/carbon monoxide gas mixture at temperatures high enough to prevent the gas mixture from back-reacting to magnesium oxide and carbon.

This invention relates to the formation of a new solid material composed of calcium phosphates and to the reaction method for producing this material. The solid calcium phosphate material is created by chemically reacting calcium ion sources with phosphate ion sources in a molten state and cooling the reaction mixture to room temperature producing the solid material. Depending upon the ratio of components and the parameters of the heating reaction, the resulting material may be a smooth, non-porous material with exceptional hardness, or it may be a porous material. Both types of material can be shaped into desired configurations, such as artificial teeth.

Solid calcium phosphate materials

A new synthesis is disclosed which produces synthetic crystalline hydroxyapatite. The process comprises reacting anhydrous trisodium phosphate wih calcium chloride in a formamide/water solution. Good yields of hydroxyapatite are obtained quickly, simply, and at low temperatures.

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New York, NY, United States of America

John Joseph Barsa