Process for simulated moving bed separation with a constant recycle rate
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United States of America Patent
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Aug 8, 2000
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N/A
app pub date -
Mar 30, 1998
filing date -
Apr 28, 1994
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Abstract
A chromatographic simulated moving bed separation process is most generally characterized by a recycling pump which successively adopts the flow rate characteristics of 4 or 5 zones of the process. The invention describes the method by which a conventional simulated moving bed separator process can be adapted to a simulated moving bed process in which the recycling pump is operated at an optimal constant flow rate. In order to achieve this, throughout the cycle all the introduction and extraction circuits are shifted using independent means, such that the eluted volume at the outlet to each zone remains substantially constant, zone by zone, between two successive shifts throughout the cycle.
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