Water purification utilizing plural semipermeable membrane stage

Details Water purification utilizing plural semipermeable membrane stage Water purification utilizing plural semipermeable membrane stage

1982-02-11

1984-02-28

Sadowski, David R.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210639, 210652, 210669, 210673, 210677, 210774, 203 39, 203 71, 203DIG16, 204 98, 204129, 204180P, 204186, B01D 1300

Patent

active

044340575

ABSTRACT:
The treatment of raw water, particularly the desalination of waste or other water with a high salt content, is accomplished by means of a process which includes two membrane separation steps performed in concentrate sequence. The concentrate from the second membrane separation step is further treated by means of a thermal concentrating procedure. The water to be processed is first treated to minimize the formation of scale during the first membrane separation step and the concentrate from the first membrane separation step is similarly treated. The overall process also includes the production of materials necessary for reconditioning ion exchange apparatus employed for raw water conditioning and concentrate treatment.

REFERENCES:
patent: 3547810 (1970-12-01), Cooper
patent: 3639231 (1972-02-01), Bresler
patent: 3823086 (1974-07-01), Schmidt
patent: 3962077 (1978-06-01), Pascarella et al.
patent: 4141825 (1979-02-01), Conger
Perry; R. H. et al., Chemical Engineers' Handbook, McGraw-Hill Book Co., N.Y., Fifth Edition, 1973, pp. 11-27 to 38 and 19-26 to 33.
Meinck; F. et al., Industrie-Abwasser, Gustav Fischer Verlas, Stuttgart, 1968, pp. 147-149.

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