IMPROVING PRODUCT RECOVERY FROM SIMULATED-MOVING-BED ADSORPTION

Title:

IMPROVING PRODUCT RECOVERY FROM SIMULATED-MOVING-BED ADSORPTION

Document Type and Number:

WIPO Patent Application WO2006096394

Kind Code:

A8

Abstract:

Product purity from or capacity of a simulated-moving-bed adsorptive separation process is increased by flushing the contents of the transfer line (10) previously used to remove the raffinate stream away from the adsorbent chamber (100, 200), preferably into the raffinate column (400) used to separate desorbent (D) from raffinate product (RP). Preferably a stream from the adsorbent chamber at an intermediate point between the feed entry point and raffinate withdrawal is used as the flushing liquid. This flush step eliminates the passage of a quantity of the raffinate material into the adsorbent chamber (100, 200) in the transfer-line flush period or when the process conduit is subsequently used to charge the feed stream (F) to the adsorbent chamber (100, 200).

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Inventors:

FREY STANLEY J (US)

Application Number:

PCT/US2006/007146

Publication Date:

July 26, 2007

Filing Date:

March 01, 2006

Export Citation:

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Assignee:

UOP LLC (US)
FREY STANLEY J (US)

International Classes:

C07C7/12

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