Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1983-12-29
1988-07-12
Stoll, Robert L.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423DIG19, 423 87, 75108, 75109, 75118R, 203 7, 210702, 210719, C01G 500
Patent
active
047568887
ABSTRACT:
A method is disclosed for controlling the deposition of metal-containing scales, such as iron silicate scale, from a hot, aqueous, geothermal brine or the like, without substantial corrosion of brine handling equipment. The brine is contacted with (1) an amount of an acid sufficient to reduce the pH of the brine between 0.1 and 0.5 unit and (2) a greater than stoichiometric amount of a reducing agent for reducing trivalent iron and manganese cations in a high temperature brine solution to divalent ions. An overall decrease in scale deposition, especially of iron silicate scale, is achieved while a silver-rich scale can be recovered from silver-containing brines.
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Gallup Darrell L.
Jost John W.
Lambert Howard R.
Sandford D.
Stoll Robert L.
Union Oil Company of California
Wirzbicki G.
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