Richard A Lamparter Deceased12864 Viscaino Rd, Los Altos, CA 94022
Richard Lamparter Phones & Addresses
12864 Viscaino Rd, Los Altos, CA 94022 650-9415954
Los Altos Hills, CA
Pacifica, CA
Sunnyvale, CA
Houghton, MI
12864 Viscaino Rd, Los Altos, CA 94022
Mentions for Richard A Lamparter
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Us Patents
Process For Recovering Terephthalic Acid From Waste Polyethylene Terephthalate
US Patent:
4542239, Sep 17, 1985
Filed:
Jun 7, 1983
Appl. No.:
6/501805
Inventors:
Richard A. Lamparter - Houghton MI
Bruce A. Barna - Las Cruces NM
David R. Johnsrud - North Brunswick NJ
Bruce A. Barna - Las Cruces NM
David R. Johnsrud - North Brunswick NJ
Assignee:
Board of Control of Michigan Technological University - Houghton MI
International Classification:
C07C 51487
C07C 2988
C07C 2988
US Classification:
562487
Abstract:
Terephthalic acid (TPA) is recovered from used polyethylene terephthalate beverage containers by reacting comminuted containers in a reaction zone with an aqueous medium containing ammonium hydroxide at elevated temperatures and pressures to form a water soluble diammonium salt of TPA, separating any undissolved solids from the reaction product, acidifying the remaining reaction product to liberate TPA, and separating the precipitated TPA. A portion of the liquid remaining after separation of TPA can be mixed with lime or slaked lime, the resulting mixture treated in an ammonia stripper to remove ammonia therefrom and the ammonia overheads from the stripper blended with another portion of the liquid remaining after separation of TPA to form a stream containing ammonium hydroxide which is recycled to the reaction zone. Ethylene glycol can be recovered from the bottoms from the ammonia stripper by distillation.
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