Compositions – Leather or fur treating
Patent
1986-10-15
1989-05-16
Schofer, Joseph L.
Compositions
Leather or fur treating
252 8551, 252178, 25218825, 25218828, 166300, 166310, 210696, 210757, 422 12, 606415, C02F 508, C02F 510, C02F 512
Patent
active
048307661
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.
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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.
Hackh's Chemical Dictionary, Grant J. (ed.), 4th ed., McGraw-Hill Co., Inc., N.Y., (1969), pp. 596, 610, and 781.
Gallup Darrell L.
Jost John W.
Bostich June M.
Lambert Howard R.
Schofer Joseph L.
Teskin F. M.
Union Oil Company of California
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