Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...
Patent
1983-12-29
1985-08-27
Williams, Howard S.
Liquid purification or separation
Processes
Preventing, decreasing, or delaying precipitation,...
166310, 166902, 210698, 606415, 252 855B, 252 855C, 252 855E, C02F 508
Patent
active
045376840
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.
REFERENCES:
patent: 3958635 (1976-05-01), Zilch et al.
patent: 4032460 (1977-06-01), Zilch et al.
patent: 4044830 (1977-08-01), Van Huisen
patent: 4054175 (1977-10-01), Swearingen
patent: 4112745 (1978-09-01), McCabe et al.
patent: 4127989 (1978-12-01), Mickelson
patent: 4131191 (1978-12-01), Lacquement
patent: 4137719 (1979-02-01), Rex
patent: 4151260 (1979-04-01), Woertz
patent: 4203492 (1980-05-01), Watanabe
patent: 4224151 (1980-09-01), Jost
patent: 4242305 (1980-12-01), Sperack
patent: 4244190 (1981-01-01), Lieffers
patent: 4267887 (1981-05-01), Watanabe
patent: 4302328 (1981-11-01), Van Note
patent: 4304666 (1981-12-01), Van Note
patent: 4319895 (1982-03-01), Kemmer
patent: 4328106 (1982-05-01), Harrar et al.
patent: 4370858 (1983-02-01), Awerbuch et al.
patent: 4405463 (1983-09-01), Jost et al.
patent: 4414817 (1983-11-01), Jernigan
patent: 4420938 (1983-12-01), Lieffers
patent: 4429535 (1984-02-01), Featherstone
patent: 4454914 (1984-06-01), Watanabe
patent: 4468929 (1984-09-01), Jernigan
patent: 4476930 (1984-10-01), Watanabe
patent: 4485874 (1984-12-01), Meyer
patent: 4487265 (1984-12-01), Watanabe
"Field Evaluation of Scale Control Methods: Acidification" by J. Z. Grens and L. B. Owen, Lawrence Livermore Laboratory, Geothermal Resources Council, Transactions, vol. 1, May 1977.
"Solids Control for High Salinity Geothermal Brines" by J. H. Hill, C. H. Otto, Jr., and C. J. Morris, Geothermal Resources Council, Transactions, vol. 1, May 1977.
"Using Salton Sea Geothermal Brines for Electric Power: A Review of Progress in Chemistry and Materials Technology--1976 Status" by George E. Tardiff, Lawrence Livermore Laboratory, Twelfth Intersociety Energy Conversion Engineering Conference, Washington, D.C., Aug. 2 to Sep. 2, 1977.
"Determination of the Rate of Formation of Solids from Hypersaline Geothermal Brine as a Function of pH" by J. E. Harrar, C. H. Otto, Jr., J. H. Hill, C. J. Morris, R. Lim, and S. B. Deutscher, Lawrence Livermore Laboratory, Sep. 28, 1977.
"Extraction of Nonferrous Metals from High Salinity Brine Geothermal Brine by Sulfide Precipitation" by D. D. MacDonald and E. P. Farley, Society of Mining Engineers of AIME, Preprint No. 80-98 presented at AIME Annual Meeting, Feb. 24-28, 1980.
"Operation of a Mineral Recovery Unit on Brine from the Salton Sea Known Geothermal Resource Area" by L. E. Schultze and D. J. Bauer, U.S. Department of the Interior, Bureau of Mines Report of Investigations, 8680, (1982).
Gallup Darrell L.
Jost John W.
Bostich June M.
Chapman Terryence
Sandford Dean
Union Oil Company of California
Williams Howard S.
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