Process for regulating at least one fluid flow circulating in a

Details Process for regulating at least one fluid flow circulating in a Process for regulating at least one fluid flow circulating in a

1996-12-26

1997-11-11

Therkorn, Ernest G.

Liquid purification or separation

Processes

Chromatography

2101982, B01D 1508

Patent

active

056859929

ABSTRACT:
A process for regulating at least one flow of at least one fluid or effluent circulating in a simulated moving bed comprising columns which form a closed loop containing at least one device such as a recycling pump introducing a pressure anisotropy. Every time an injection or extraction point passes from one part of the pump to the other, a control device which controls a fluid flow regulating means for the fluid under consideration, regulated about a set value, is caused to stop regulation temporarily, and substantially simultaneously the regulating means is placed in a position which allows it to approach the desired value, preferably to reach the desired flow rate and to begin to regulate the flow rate about the desired set value, to keep the flow rates in all the zones in a simulated moving bed constant. The process is especially applicable Application to the separation of para-xylene from a mixture of xylenes.

REFERENCES:
patent: 2985589 (1961-05-01), Broughton
patent: 3268605 (1966-08-01), Boyd, Jr.
patent: 4447329 (1984-05-01), Broughton
patent: 4498991 (1985-02-01), Oroskar
patent: 5093004 (1992-03-01), Hotier
patent: 5102553 (1992-04-01), Kearney
patent: 5114590 (1992-05-01), Hotier
patent: 5422007 (1995-06-01), Nicoud
patent: 5470482 (1995-11-01), Holt

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