CO2 recovery process for supercritical extraction

Details CO2 recovery process for supercritical extraction CO2 recovery process for supercritical extraction

2005-11-01

2005-11-01

Lawrence, Frank M. (Department: 1724)

Gas separation: processes

Solid sorption

C096S134000, C055S315100, C062S606000, C062S050200, C062S928000

Reexamination Certificate

active

06960242

ABSTRACT:
A carbon dioxide recovery apparatus and process for supercritical extraction includes providing a process stream from a supercritical extraction procedure in which the process stream includes pressurized carbon dioxide, extraction process waste and optionally at least one co-solvent; reducing the pressure of the process stream below critical pressure; venting low pressure carbon dioxide vapor to exhaust; cooling the process stream to form a two phase mixture; separating the two phase mixture into a process liquid, containing co-solvent if present, and a process vapor phase stream; collecting the process liquid; filtering the process vapor phase stream to remove particulates and optionally residual co-solvent; passing the filtered process vapor stream through an adsorber to remove trace impurities to form a purified carbon dioxide vapor stream; and, drying the purified carbon dioxide vapor stream to remove residual water vapor.

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