Methylene phosphonic acid scale inhibitor compositions derived f

Details Methylene phosphonic acid scale inhibitor compositions derived f Methylene phosphonic acid scale inhibitor compositions derived f

1983-09-02

1985-05-21

Daus, Donald G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

210700, 252 82, 252180, C07D24104, C07D40312, C02F 514

Patent

active

045187770

ABSTRACT:
Certain methylene phosphonic acid derivatives of aminohydrocarbyl piperazine-urea adducts are good threshold agents to prevent metal ion precipitation in aqueous solutions. These derivatives have the formula ##STR1## wherein A is ##STR2## wherein X is ##STR3## or H and wherein R is H, ammonium, an alkali or alkaline earth metal, m is 0-2, n is 2 or 3 and wherein at least one X is ##STR4##

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