Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1997-06-11
1999-03-23
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210695, 210743, 210 961, 210196, 210202, 210251, C02F 900
Patent
active
058854630
ABSTRACT:
A process for continuously controlling the pH value of an industrial process liquid removes impurities contained therein from the liquid and controls its pH value. If necessary, an aqueous solution having an acid or basic character is added. The purified process liquid having the desired acid or basic pH value is fed to the industrial process, maintaining the character of the aqueous solution constantly acid or basic by means of ion exchange resins and repeating the above steps. The system comprises a first tank (11) with a pH-meter (18) for the process liquid to be treated, a second tank (12) for the aqueous solution, pumps or the like (13,16) for recirculating the process liquid in the first tank (11) and supplying it to the industrial process and for recirculating the aqueous solution in the second tank (12), and a valve arrangement (20) for admitting to the first tank (11) the pH adjusting liquid to be added to the process liquid to be treated.
REFERENCES:
patent: 4274959 (1981-06-01), Roediger
patent: 4917806 (1990-04-01), Matsunaga et al.
patent: 5145585 (1992-09-01), Coke
Cintins Ivars
Ecografica S.r.1.
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