Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1981-11-04
1983-09-20
Hruskoci, Peter A.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
606412, 210717, 210722, 210737, 210747, 423339, 423632, C02F 152, C02F 174
Patent
active
044054637
ABSTRACT:
A process for stabilizing silica-rich geothermal brine to prevent silica scaling comprises selectively providing a supply of ferric ions, allowing the silica-rich brine to combine with the ferric ions to form insoluble, iron-rich siliceous material and separating the insoluble siliceous material from the brine to form a brine having a silica content which is reduced below the saturation level required for substantially scale-free handling of the brine. In one embodiment of the process in which the brine contains sufficient dissolved ferrous ions, the process comprises selectively contacting the brine with an oxidizing agent, preferably by aerating the brine, to oxidize a selected portion of the ferrous ions to ferric ions, which then combine with silica to form the insoluble iron-rich siliceous material. The ferric ion content of an iron-deficient brine may be augmented by adding ferric and/or ferrous ions to the brine. Steam released by flashing the untreated brine may be used to heat the stabilized brine before disposal thereof, so as to increase the silica solubility and reduce the amount of silica required to be removed to prevent scaling.
REFERENCES:
patent: 2267831 (1941-12-01), Liebknecht et al.
patent: 2447511 (1948-08-01), Leaf
patent: 3681238 (1972-08-01), Emmett
patent: 3757516 (1973-09-01), McCabe
patent: 3951794 (1976-04-01), Swearingen
patent: 3958635 (1976-05-01), Zilch et al.
patent: 4016075 (1977-04-01), Wilkins
patent: 4032460 (1977-06-01), Zilch et al.
patent: 4127989 (1978-12-01), Mickelson
Betz et al., "Removal of Silica from Water by Hot Process," Ind. & Eng. Chem., Oct. 1940, 1323-1329.
"A Survey of Treatment Methods for Geothermal Fluids," Sidney L. Phillips et al., 1976, (Paper #SPE-6606), Amer. Inst. of Mining, Metallurgical and Petroleum Engineers, Inc.
"Scaling and Corrosion in an Experimental Geothermal Power Plant", H. K. Bishop, et al., 1976, Paper #SPE-6612, American Institute of Mining and Metallurgical and Petroleum Engineers, Inc.
"Disposal of Geothermal Waste Water by Reinjection," Sveinn S. Einarsson et al., Proceedings of the Second Annual Symposium on the Development and Use of Geothermal Resources, May 1975, San Francisco, CA, pp. 1349-1363.
"Environmental Aspects of the Multi-Purpose Development of Geothermal Resources," John S. Wilson, AIChE Symposium Series, vol. 170, No. 136, 1973, pp. 782-787.
"Geothermal Chemical Engineering", Robert C. Axtman, et al., AIChE Journal, (vol. 22, No. 5), Sep. 1976, pp. 817-878.
"Removal of Silica from Raft River Geothermal Water," D. C. Sueiu, et al., U.S. Department of Energy Report EGS-FM-5170, Jun. 1980.
"Field Evaluation of Scale Control Methods: Acidification," J. Z. Grens, et al., Geothermal Resources Council Transactions, vol. 1, May 1977, pp. 119-121.
"Sourcebook on the Production of Electricity from Geothermal Energy," Brown University, Mar. 1980, (DOE Publication DOE/RA/4051-1), p. 536.
"Sulfide Precipitation of Heavy Metals from High Salinity Geothermal Brine," R. W. Bartlett, et al., Geothermal Resources Council, Transactions, vol. 3, Sep. 1979.
Jost John W.
Lieffers William C.
Whitescarver Olin D.
Floyd Gerald L.
Hruskoci Peter A.
Sandford Dean
Union Oil Company of California
Wirzbicki Gregory F.
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