General Electric Company

Michael Lee White

Matthew David Butts

David Cheney DeMoulpied

Slawomir Rubinsztajn

Bang M Kim

John Aibangbee Osaheni

John P Banevicius

Sunita Singh Baghel

Stanlee Teresa Buddle

Luisito A Tolentino

Frank S Burkus, Ii

Larry Allen Divins

William Lee Gately

Ray Walton Shade

Jan-Willem Goedmakers

Jeffrey David Hallen

Mark Kromer Barr

Edward Francis Kennedy

The instant invention provides a process for reducing chloride content from by-products generated during production of methylchlorosilanes, comprising, (a) hydrolyzing the by-products by combining the by-products with an aqueous medium, the aqueous medium optionally comprising a surfactant, at a pH of at least about 7 and at a temperature above about 0.degree. C. to yield a first phase comprising essentially solids and a second phase comprising an aqueous phase; (b) separating the first and second phase; and (c) oxidizing the solids from the first phase at a temperature of at least about 300.degree. C. for up to about 24 hours to yield a residue comprising less than about 1% by weight of chloride. The solids from the first phase may alternatively be reduced under a hydrogen flow, at a temperature of at least about 500.degree. C. for up to about 24 hours.

Process for reducing the residual chloride concentration in copper

The instant invention relates to a novel process for the hydrolysis of the by-products produced during the manufacture of methyldichlorosilanes comprising combining the by-products with an aqueous medium, optionally comprising a surfactant, at a pH range of at least about 7 and at a temperature of above about 0.degree. C. to produce a solid material in which copper and other metals are retained in a solid phase thereby resulting in a product with a high copper content.

Process for treating methylchlorosilanes by-products

Inorganic powder, preferably fumed silica, is rendered hydrophobic by treatment with a silylating agent in the presence of a third reagent selected from the group consisting of protonic acids, especially those having a boiling point at atmospheric pressure up to 120.degree. C., preferably formic acid, and linear phosphonitrilic halides, preferably linear phosphonitrilic chlorides.

Method for rendering inorganic powder hydrophobic

A silanol condensation-equilibration catalyst is provided in the form of a mixture of a linear phosphonitrilic chloride and an effective amount of a protic acid having a pKa.ltoreq.5, such as HCl. A material capable of generating a protic acid in situ during equilibration, such as an organohalosilane, is also effective.

Silicone condensation and/or equilibration catalyst and use

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Clifton Park, NY, United States of America

Michael Lee White