Gas separation: processes – Liquid contacting – And degasification of a liquid
Patent
1997-07-03
1998-11-17
Smith, Duane
Gas separation: processes
Liquid contacting
And degasification of a liquid
95173, 95176, 95178, 95223, 95237, B01D 4700
Patent
active
058370374
ABSTRACT:
The present invention relates to a method for removing high molecular weight high melting point hydrocarbon vapors from a hydrocarbon vapor offgas stream produced during the liquefaction of a solid waste plastic material to produce an oil that serves as a liquid feedstock for a partial oxidation reaction. The hydrocarbon vapor offgas stream is directly contacted with a water spray at a condensation temperature above the melting point of the high molecular weight hydrocarbons contained in the offgas. This results in the condensation and convenient removal of the high melting point hydrocarbons, referred to as "waxes." One or more subsequent condensation steps can be conducted at lower condensation temperatures to remove the lower temperature condensable hydrocarbons. The remaining uncondensed vapors are then recycled to serve as a heater fuel for the liquefaction of the waste plastic material.
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Gibson Henry H.
Smith Duane
Texaco Inc
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