Liquid scrubbing of gas-phase contaminants

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United States of America Patent

PATENT NO 5527517
SERIAL NO

08346259

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Abstract

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A main aspect of this invention is the provision of a liquid medium for scrubbing contaminants from an environmental gas-phase. Toxic chemicals such as phosphine and arsine are removed from a gas-phase stream by contacting the gas-phase stream with an aqueous medium which oxidizes the contaminants to water-soluble or water-dispersible type derivatives. The aqueous medium has a content of redox ingredients illustrated by compounds such as silver nitrate, hydrogen peroxide, sodium tungstate, and sulfuric acid.

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Patent Owner(s)

Patent OwnerAddress
PHILIP MORRIS INCORPORATEDA CORPORATION OF VA 120 PARK AVENUE NY NY 10017
PHILIP MORRIS PRODUCTS INC3601 COMMERCE ROAD RICHMOND VIRGINIA 23234 UNITED STATES OF AMERICA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bridges, Charles T Midlothian, VA 2 11
Howe, Charles R Richmond, VA 6 34
Paine, III John B Midlothian, VA 23 1818
Podraza, Kenneth F Richmond, VA 20 124

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