E.i. Dupont De Nemours and Company

Kevin J Leary

Charles David Musick

Narayanan Sankara Subramanian

Peter Jernakoff

Philipp Martin Niedenzu

Juergen Kurt Plischke

Stephen Claude De La Veaux

John Nicholas Birmingham

John Robert Stecher

John Larson Owen

Yunghsing Samson Hsu

One aspect of the invention is to provide a composition comprising a titanium dioxide particle having on the surface of said particle a substantially encapsulating layer comprising a pyrogenically-deposited metal oxide; said substantially encapsulating layer having on its surface at least one organic surface treatment material selected from an organo-silane, an organo-siloxane, a fluoro-silane, an organo-phosphonate, an organo-acid phosphate, an organo-pyrophosphate, an organo-polyphosphate, an organo-metaphosphate, an organo-phosphinate, an organo-sulfonic compound, a hydrocarbon-based carboxylic acid, an associated ester of a hydrocarbon-based carboxylic acid, a derivative of a hydrocarbon-based carboxylic acid, a hydrocarbon-based amide, a low molecular weight hydrocarbon wax, a low molecular weight polyolefin, a co-polymer of a low molecular weight polyolefin, a hydrocarbon-based polyol, a derivative of a hydrocarbon-based polyol, an alkanolamine, a derivative of an alkanolamine, an organic dispersing agent, or a mixture thereof. Another aspect of the invention is to provide processes for producing said composition.

Preparation of organic additive-treated, pyrogenic silica-encapsulated titanium dioxide particles

The present invention provides a process for preparing an aqueous solution of FeCl.sub.3. The process involves the steps of: (a) reacting an ore material comprising titanium and iron with chlorine and coke to form a metal chloride vapor stream comprising titanium tetrachloride, ferrous chloride, ferric chloride and unreacted coke and ore solids; (b) cooling the metal chloride vapor stream to a temperature in the range of 350 to 500.degree. C. to condense at least some of the ferrous chloride; (c) separating the condensed ferrous chloride and the unreacted coke and ore solids from the metal chloride vapor stream; (d) cooling the metal chloride vapor stream to a temperature in the range of 180 to 240.degree. C. to form a precipitate comprising ferric chloride; and (e) adding the precipitate to water to form an aqueous solution comprising ferric chloride. The resulting aqueous solution has a high FeCl.sub.3 content, and can be used in wastewater treatment applications.

Process for producing an aqueous solution comprising ferric chloride

A process for beneficiation of titaniferous ores is disclosed in which a titanium and iron-containing ore, such as ilmenite is heated with potassium hydroxide, e.g. at temperatures of about 350.degree.-650.degree. C. and then treating the product with carbon monoxide and water. After cooling and washing the solid product can be separated by magnetic means into an iron-containing magnetic fraction and a titanium-containing fraction.

Benefication of titaniferous ores

Disclosed is a process for beneficiating titaniferous material which contains iron oxide. The titaniferous material is mixed with a molten salt or mixture or molten salts in which iron oxide dissolves to produce iron ions and oxyanions. The iron ions are electrolytically reduced to iron at the cathode and deposited as high purity iron on the cathode. The oxyanions react with a carbonaceous anode to generate CO and/or CO.sub.2. A beneficiated TiO.sub.2 product is recovered from the molten salt or mixture of molten salts.

Molten salt electrolytic beneficiation of iron oxide-containing

This invention relates to homogeneous copper-containing oxide superconductors with improved superconducting properties and a process for preparing them.

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Waverly, TN, United States of America

Kevin J Leary