Method for sequestering metal ions

Details Method for sequestering metal ions Method for sequestering metal ions

1977-01-18

1978-07-11

Hart, Charles N.

Liquid purification or separation

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

Responsive to fluid flow

21 27A, 252180, 252389A, 252390, 162 76, 162 80, 162158, 162DIG4, C02B 506

Patent

active

041000676

ABSTRACT:
Valuable amino alkane diphosphonic acids in which one or both hydrogen atoms of the amino group are substituted by hydroxy alkane groups, and their alkali metal salts and a process of using them are described. Said compounds are highly water-soluble, are stable against hydrolysis even at temperatures exceeding 100.degree. C., and have a high sequestering power so that they can be used advantageously, for instance, in processing aqueous media of considerable hardness, and in suppressing scale and corrosion in aqueous media used for heat treatment of containers.

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patent: 2964549 (1960-12-01), Ramsey et al.
patent: 3733270 (1973-05-01), Kerst
patent: 3904493 (1975-09-01), Losi et al.
patent: 3907652 (1975-09-01), Wagenknecht et al.
patent: 3957160 (1976-05-01), Ploger et al.
patent: 4010067 (1977-03-01), Hoeger et al.
patent: 4029696 (1977-06-01), Sommer et al.
patent: 4029697 (1977-06-01), Krueger et al.
patent: 4054598 (1977-10-01), Blum et al.
patent: 4056430 (1977-11-01), Hoeger et al.

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