Water conditioning process

Details Water conditioning process Water conditioning process

1974-11-04

1978-04-11

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 38A, 210 38B, C02B 176

Patent

active

040837823

ABSTRACT:
Water is conditioned by contacting it with a weak acid cation exchange resin based upon a crosslinked methacrylic acid copolymer structure in the alkali metal (or ammonium) form. The resin when exhausted may be regenerated by either a two-step acid/alkali technique or by a one-step technique using a citric or fumaric acid solution or a poly or hexamethaphosphate solution. Water by this method is substantially free of hardness ion, dissolved heavy metal ions and has a corrected pH between 7 and 9.5, preferably between 8 and 8.5.

REFERENCES:
patent: 2374100 (1945-04-01), Jackson
patent: 3342730 (1967-09-01), Mihara et al.
patent: 3414507 (1968-12-01), Calmon
patent: 3493498 (1970-02-01), Abrams et al.
patent: 3663163 (1972-05-01), De Prec et al.
patent: 3767600 (1973-10-01), Albright

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