Aluminum Company of America

Alcoa Inc.

Michael A Easley

Alan Pearson

William E Horn

Larry F Wieserman

David H DeYoung

Patricia Stewart

Paula L Kolek

John E Marhanka

David J Roha

Dinesh Moorjani

Jorge A Ramos Cruz

A method of producing aluminum castings which includes the steps of casting a molten alloy, contacting the surface of the molten alloy with a humidified atmosphere and solidifying the alloy. The method is particularly suited for aluminum-magnesium alloys such as AA 5XXX and 7XXX series alloys. In addition to reducing the thickness of the surface oxide layer formed during casting, the method also provides improved surface quality of cast products and reduces subsequent remedial re-work or scalping. An improved aluminum-magnesium cast alloy product is also disclosed.

Control of oxide growth on molten aluminum during casting using a high moisture atmosphere

Low temperature mineralization of alumina

A method for making an essentially unsaturated synthetic meixnerite with high CO.sub.2 adsorption abilities. The method comprises activating hydrotalcite, then cooling and rehydrating such activated material in a carbon dioxide-free environment. The resultant material can absorb more than 10 milliliters of CO.sub.2 per gram.

Carbon dixide adsorption of synthetic meixnerite

A method for making a synthetic mixed metal oxide or meixnerite which, when activated, has a high B.E.T. surface area, typically about 290 m.sup.2 /g or greater. The method comprises activating hydrotalcite, then cooling and hydrating such activated material with a metal salt solution in a carbon dioxide-free environment. Such hydration can produce a material that absorbs more than 100% of its weight in water. Following hydration, this material is activated a second time in a virtually carbon dioxide-free environment. Such reactivation decomposes the salt and leaves a supported metal oxide readily available to be used for catalyst reactions.

High surface area meixnerite from hydrotalcites infiltrated with metal

A method for making a synthetic meixnerite which, when activated, has a high B.E.T. surface area, typically about 290 m.sup.2 /g or greater. The method comprises activating hydrotalcite, then cooling and hydrating such activated material in a carbon dioxide-free environment. Such hydration can produce a material that absorbs more than 100% of its weight in water. Following hydration, this material is activated a second time in a virtually carbon dioxide-free environment.

High surface area meixnerite from hydrotalcites

A method of producing small diameter titanium carbide whiskers is disclosed. The method comprises supplying a source of materials comprised of titanium halide, hydrocarbon gas and nickel and reacting this material in the presence of a source of carbon monoxide to produce small diameter titanium carbide whiskers.

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Arnold, PA, United States of America

Michael A Easley