Use of reducing agents to control scale deposition from high tem

Details Use of reducing agents to control scale deposition from high tem Use of reducing agents to control scale deposition from high tem

1989-03-13

1991-12-17

Teskin, Fred

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

210757, 210696, 252 8551, 252 8552, 166300, 166310, 422 12, 606412, 606415, C02F 508

Patent

active

050732706

ABSTRACT:
The deposition of metal-containing scale, such as iron silicate scale, from a hot aqueous geothermal brine, or the like, is controlled by blending into the brine sufficient reducing agent effective for reducing trivalent iron and manganese cations in a high temperature brine solution to divalent ions to cause an overall decrease in scale deposition, especially of iron silicate scale. Preferably, from 2 to 7 times the stoichiometric amount of reducing agent is used to effect a 70 to 90 percent reduction in the formation of iron silicate scale.

REFERENCES:
patent: 3639278 (1972-02-01), Hwa
patent: 3639279 (1972-02-01), Gardner et al.
patent: 3769208 (1973-10-01), Cook et al.
patent: 4500434 (1985-02-01), Jost et al.
patent: 4517097 (1985-05-01), Merrill, Jr.
patent: 4537684 (1985-08-01), Gallup et al.

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