Sugar – starch – and carbohydrates – Processes – Carbohydrate manufacture and refining
Patent
1979-11-19
1982-03-16
Cintins, Ivars C.
Sugar, starch, and carbohydrates
Processes
Carbohydrate manufacture and refining
210692, 210673, C13D 314
Patent
active
043199291
ABSTRACT:
A process for separating a selected component from a fluid mixture of components by employment of an ion exchange resin. Fluid flow is maintained during a separation mode through a column containing the adsorbent in at least three separation zones, an adsorption zone in which the selected component is adsorbed by the adsorbent, a purification zone and a desorption zone from which the selected component is displaced by a desorbent material. The zones are periodically shifted through the column by advancing the input and output streams. The improvement comprises periodically backflushing the resin bed in a backflushing mode distinct from the separation mode by passing a feed material through the same line that will pass the feed material in the separation mode following backflushing and removing a backflushing output stream upstream, with respect to the direction of fluid flow in the separation mode, of the feed stream inlet. The backflushing serves to decrease the density of the resin bed thereby controlling the pressure drop developed through that bed when it is in service as part of a separation zone. The ion exchange resin particularly suitable for the invention is an alkali metal salt of a nuclearly sulfonated styrene-cation exchange resin containing a cross-linking agent. The process of the invention is particularly suitable for the separation of a saccharide from an aqueous solution of saccharides.
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Cintins Ivars C.
Hoatson Jr. James R.
Morris Louis A.
Page II William H.
UOP Inc.
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