Heat treatment process and system for increased pitch yields

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United States of America Patent

PATENT NO 11248172
APP PUB NO 20210024830A1
SERIAL NO

16520135

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Pitch production systems utilizing coal tar or decant oil for coal or petroleum based pitch are disclosed. Total pitch production yields are increased by heat treating distillate fractions from the pitch production process. A heat treatment system and process are disclosed in embodiments. The heaviest distillates having the highest molecular weights are subjected to heat treatment, though other embodiments contemplate heat treating a variety of combined distillate fractions. The heat treatment systems require heat soaking the distillate(s) at elevated temperatures of 459-535° C. at a near-constant temperature with near-uniform flow. A fraction of the heat-treated distillate may be reintroduced to the pitch production system as part of a continuous process.

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Patent Owner(s)

  • KOPPERS DELAWARE, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baron, John Thomas Cranberry Township, US 3 0
Cairns, Billy Jay Monaca, US 5 0
Dietz, James T Mars, US 10 0
Malmqvist, Michael Bech Odense, DK 4 0
Mueller, Carl Camille Gibsonia, US 6 0

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