Liquid purification or separation – Constituent mixture variation responsive – With membrane
Patent
1980-03-10
1981-07-07
Cintins, Ivars C.
Liquid purification or separation
Constituent mixture variation responsive
With membrane
210136, 210266, B01D 1504, B01D 2314, B01D 3100
Patent
active
042773326
ABSTRACT:
A water purifier having its principal utility in medical, biological and chemical laboratories comprising a housing having a water inlet and three water outlets and containing a charcoal layer which strips the water of absorbed and non-ionized dissolved impurities, and an ion-exchange resin layer which strips the water of ionized dissolved impurities, and a submicron pore size filter membrane which strips the water of bacteria and other solid impurities, two of the three water outlets being for withdrawing water from the housing after it has passed through the aforesaid layers and the membrane, and the third of the three water outlets being for withdrawing water from the housing after it has passed through the aforesaid layers not through the membrane. The purifier further includes a water reservoir and a pump for pumping water from the reservoir through the inlet opening into the housing, the water from the third outlet opening and from one of the other two outlet openings being cycled back to the reservoir for recycling through the housing until the ionized impurity content of the water has been reduced to the extent desired, there being means for measuring such impurity in the water cycled back to the reservoir. The other of the two outlets for the water which has passed through the layers and the membrane is connected to a conduit which leads to a dispensing outlet for the purified water, valve means being provided for opening this conduit and for closing the conduit which leads the filtered water back to the reservoir when the impurity content has been reduced to the level desired.
REFERENCES:
patent: 3084427 (1963-04-01), Holcomb
patent: 3618775 (1971-11-01), Hultgren
patent: 3964999 (1976-06-01), Chisdes
patent: 4160727 (1979-07-01), Harris
patent: 4196081 (1980-04-01), Pavia
Cintins Ivars C.
Gelman Sciences Inc.
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