Liquid purification or separation – Flow – fluid pressure or material level – responsive – Fluid current controlled cyclic system
Patent
1993-06-30
1995-10-10
Dawson, Robert A.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Fluid current controlled cyclic system
210136, 2101982, 210253, 210258, 210287, 585822, B01D 2410, C07C 712
Patent
active
054568250
ABSTRACT:
An improved simulated moving bed separation system is disclosed. The improved novel system is characterized by being provided with rotary valves or check valves or both. The rotary valves are provided at the position where desorbing liquid is introduced, the position where the extract is taken out, the position where the feedstock is introduced and the position where the raffinate is taken out and the rotary valves are intermittently switched on and off, whereby the liquid take out of the unit packed bed preceding the position where the desorbing liquid is introduced is supplied to the circulation pump. The check valves are provided in the fluid flow passage between a unit packed bed and an extract draw-out port positioned in the next unit packed bed in the direction in the next unit packed bed in the direction of fluid flow. Thus liquid flow is smoothly controlled and the more effective separation is realized.
REFERENCES:
patent: 2985589 (1961-05-01), Broughton et al.
patent: 5122275 (1992-06-01), Rasche
patent: 5126055 (1992-06-01), Yamashita et al.
patent: 5200075 (1993-04-01), Otani et al.
European Search Report for EP 93110371.7.
Negawa Masakazu
Shoji Fumihiko
Daicel Chemical Industries Ltd.
Dawson Robert A.
Walker W. L.
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