Liquid purification or separation – Constituent mixture variation responsive – With membrane
Patent
1986-02-05
1986-11-11
Cintins, Ivars
Liquid purification or separation
Constituent mixture variation responsive
With membrane
210662, 210 961, 2101952, 210284, 210900, C02F 900
Patent
active
046221336
ABSTRACT:
A system for producing deionized water comprising at least a pair of oppositely charged ion exchanger units connected in series, a pump, a sensor for detecting the level of specific conductivity of process water and lines connecting the pump, ion exchanger unit and sensor in a closed-loop flow circuit. A controller operates the system in a first mode in which a batch of process water is repeatedly circulated along the closed-loop flow circuit until the specific conductivity sensed is less than a first predetermined level and alternately in a second mode in which the batch of water so treated is discharged while another batch of water is introduced into the system until the specific conductivity sensed is greater than a second predetermined level which is higher than the first predetermined level.
REFERENCES:
patent: 3276458 (1966-10-01), Iversen et al.
patent: 3870033 (1975-03-01), Faylor et al.
patent: 3985648 (1976-10-01), Casolo
patent: 4246101 (1981-01-01), Selby
patent: 4341636 (1982-07-01), Harder et al.
patent: 4548716 (1985-10-01), Boeve
Cintins Ivars
Nippon Paint Co. Ltd.
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