Method of controlling hydrogen ion concentration by microcapsule

Details Method of controlling hydrogen ion concentration by microcapsule Method of controlling hydrogen ion concentration by microcapsule

1971-08-17

1976-02-10

Stern, Edward

Chemistry of inorganic compounds

Miscellaneous process

423265, 423274, C02B 130

Patent

active

039377989

ABSTRACT:
A method for controlling the hydrogen ion concentration of an aqueous solution is provided, which method comprises adding to an aqueous solution, microcapsules prepared by encapsulating an acid material with a polymer, which is dissolved in or swelled with water in an alkaline state only, and/or microcapsules prepared by encapsulating an alkaline material with a polymer, which is dissolved in or swelled with water in an acid state only, and adding an aqueous acid solution or an aqueous alkaline solution to the system.

REFERENCES:
patent: 714960 (1902-12-01), Smith et al.
patent: 3014783 (1961-12-01), Young
patent: 3691090 (1972-09-01), Kitajima et al.
patent: 3703576 (1972-11-01), Kitajima et al.
patent: 3714065 (1973-01-01), Kitajima et al.
"Modern pH and Chlorine Control" by W. A. Taylor & Co., Baltimore, Md., pp. 2, 6, 9, 11, 14 and 15.

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