On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine

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A number of compounds have been screened as potential scale control agents by examining their effect on the precipitation of silica from Magmamax No. 1 brine. The substances were tested using the Lawrence Livermore Laboratory scale-control test system at the Niland, California, test site. Solutions of the test substances were injected into flowing brine at approx. 200/sup 0/C, the brine was flashed at 125/sup 0/C, and then the kinetics of solids and silica precipitation from effluent brine held at 90/sup 0/C were measured. Compounds tested include a variety of cellulose derivatives, ethylene oxide polymers, several polyethoxylated surfactants, and a phosphonate. ... continued below

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Pages: 27

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Harrar, J.E.; Locke, F.E.; Lorensen, L.E.; Otto, C.H. Jr.; Deutscher, S.B.; Frey, W.P. et al. April 3, 1979.

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Description

A number of compounds have been screened as potential scale control agents by examining their effect on the precipitation of silica from Magmamax No. 1 brine. The substances were tested using the Lawrence Livermore Laboratory scale-control test system at the Niland, California, test site. Solutions of the test substances were injected into flowing brine at approx. 200/sup 0/C, the brine was flashed at 125/sup 0/C, and then the kinetics of solids and silica precipitation from effluent brine held at 90/sup 0/C were measured. Compounds tested include a variety of cellulose derivatives, ethylene oxide polymers, several polyethoxylated surfactants, and a phosphonate. The ethylene oxide moiety was confirmed as the source of activity in substances that inhibit the precipitation of silica at 90/sup 0/C, and the polyethylene glycols in the molecular weight range of approximately 10,000 to 100,000 are the most effective. A brief, in-plant scaling test with the most promising precipitation inhibitor showed that, although it significantly retarded scaling at 90/sup 0/C, there was no improvement at 125/sup 0/C or higher, and at 125/sup 0/C there may have been a slight increase in scaling rate.

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Pages: 27

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Dep. NTIS, PC A03/MF A01.

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  • Report No.: UCID-18091
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/6444210 | External Link
  • Office of Scientific & Technical Information Report Number: 6444210
  • Archival Resource Key: ark:/67531/metadc1210957

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  • April 3, 1979

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 23, 2018, 12:05 p.m.

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Harrar, J.E.; Locke, F.E.; Lorensen, L.E.; Otto, C.H. Jr.; Deutscher, S.B.; Frey, W.P. et al. On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine, report, April 3, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1210957/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.