Aminoalkylenephosphonic acids and salts thereof and their use in

Details Aminoalkylenephosphonic acids and salts thereof and their use in Aminoalkylenephosphonic acids and salts thereof and their use in

1979-08-02

1981-01-06

Weinblatt, Mayer

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

252175, 252180, 252389A, 549 6, 549 48, 422 15, C02B 506

Patent

active

042435242

ABSTRACT:
Aminoalkylenephosphonic acids and their alkali metal salts prepared by a reaction utilizing a primary or secondary tetrahydrothiophenamine 1,1-dioxide or the hydrochloride thereof, an aldehyde or a ketone, and orthophosphorous acid are useful in the control of scale and sludge deposition in aqueous systems. When used in combination with known corrosion inhibitors they show synergistic results in inhibiting corrosion of metal surfaces in contact with an aqueous system that is normally corrosive to such metals.

REFERENCES:
patent: 3705005 (1972-12-01), Ceroi et al.
patent: 4101441 (1978-07-01), Hwa et al.

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