Dissolving barium sulfate scale with aqueous solutions of salts

Details Dissolving barium sulfate scale with aqueous solutions of salts Dissolving barium sulfate scale with aqueous solutions of salts

1979-01-15

1980-02-26

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 42, 252 855B, 252 82, B08B 308

Patent

active

041904621

ABSTRACT:
Barium sulfate scale can be removed from remote locations such as those in or around the borehole of a well extending into a subterranean earth formation by contacting the scale with an aqueous solution consisting essentially of water,a monovalent cation salt of a monocyclic macrocyclic polyamine containing at least two nitrogen-linked carboxymethyl groups and enough monovalent basic compound to provide a solution pH of about 8.

REFERENCES:
patent: 3531468 (1970-09-01), Park et al.
patent: 3888877 (1975-06-01), Lehn
patent: 3966766 (1976-06-01), Lehn
patent: 4001212 (1977-01-01), Richman
patent: 4030548 (1977-06-01), Richardson et al.
Dietrich et al., Tetrahedron Letters, 1969, pp. 2889-2892.

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