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Title: On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine IV. Final tests of candidate additives

Abstract

The Lawrence Livermore Laboratory Brine Treatment Test System at Niland, Imperial Valley, California, has been used to evaluate a number of cationic polymers and surfactants as scale control agents. An initial group of compounds was narrowed to four on the basis of their activity as silica precipitation inhibitors. Three of these and certain combinations of compounds were then given a 40-h test to determine their effectiveness in retarding scales formed at 220, 125, and 90/sup 0/C. The best single compound was Corcat P-18 (Cordova Chemical Co. polyethylene imine, M.W. approx. = 1800). It had no effect on the scale at 220/sup 0/C, but it reduced the scales at 125 and 90/sup 0/C by factors of 4 and 18, respectively, and it also has activity as a corrosion inhibitor. Other promising compounds are PAE HCl (Dynapol poly(aminoethylene, HCl salt)), which also somewhat reduces the 220/sup 0/C scale; Ethoquad 18/25 (Armak methyl polyoxyethylene(15) octadecylammonium chloride); and Mirapol A-15 (a Miranol Chemical polydiquaternary compound). The best additive formulation for the brines of the Salton Sea Geothermal Field appears to be a mixture of one of these silica precipitation inhibitors with a small amount of hydrochloric acid and a phosphonate crystalline deposit inhibitor. Speculationsmore » are presented as to the mechanism of inhibition of silica precipitation and recommendations for further testing of these additives.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
5647656
Report Number(s):
UCID-18536
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; BRINES; SCALE CONTROL; CORROSION INHIBITORS; TESTING; SILICA; PRECIPITATION; ADDITIVES; CHLORIDES; HASTELLOYS; HYDROCHLORIC ACID; IMINES; INHIBITION; POLYETHYLENES; POLYMERS; SALTON SEA GEOTHERMAL FIELD; SCALING; STEELS; SURFACTANTS; TEFLON; ALLOYS; CHALCOGENIDES; CHLORINE COMPOUNDS; FLUORINATED ALIPHATIC HYDROCARBONS; GEOTHERMAL FIELDS; HALIDES; HALOGEN COMPOUNDS; HALOGENATED ALIPHATIC HYDROCARBONS; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MINERALS; MOLYBDENUM ALLOYS; NICKEL ALLOYS; ORGANIC COMPOUNDS; ORGANIC FLUORINE COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; ORGANIC POLYMERS; OXIDES; OXYGEN COMPOUNDS; PETROCHEMICALS; PETROLEUM PRODUCTS; PLASTICS; POLYOLEFINS; POLYTETRAFLUOROETHYLENE; SEPARATION PROCESSES; SILICON COMPOUNDS; SILICON OXIDES; Geothermal Legacy; 150903* - Geothermal Engineering- Corrosion, Scaling & Materials Development

Citation Formats

Harrar, J E, Locke, F E, Otto, Jr, C H, Lorensen, L E, Frey, W P, and Snell, E O. On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine IV. Final tests of candidate additives. United States: N. p., 1980. Web. doi:10.2172/5647656.
Harrar, J E, Locke, F E, Otto, Jr, C H, Lorensen, L E, Frey, W P, & Snell, E O. On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine IV. Final tests of candidate additives. United States. https://doi.org/10.2172/5647656
Harrar, J E, Locke, F E, Otto, Jr, C H, Lorensen, L E, Frey, W P, and Snell, E O. 1980. "On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine IV. Final tests of candidate additives". United States. https://doi.org/10.2172/5647656. https://www.osti.gov/servlets/purl/5647656.
@article{osti_5647656,
title = {On-line tests of organic additives for the inhibition of the precipitation of silica from hypersaline geothermal brine IV. Final tests of candidate additives},
author = {Harrar, J E and Locke, F E and Otto, Jr, C H and Lorensen, L E and Frey, W P and Snell, E O},
abstractNote = {The Lawrence Livermore Laboratory Brine Treatment Test System at Niland, Imperial Valley, California, has been used to evaluate a number of cationic polymers and surfactants as scale control agents. An initial group of compounds was narrowed to four on the basis of their activity as silica precipitation inhibitors. Three of these and certain combinations of compounds were then given a 40-h test to determine their effectiveness in retarding scales formed at 220, 125, and 90/sup 0/C. The best single compound was Corcat P-18 (Cordova Chemical Co. polyethylene imine, M.W. approx. = 1800). It had no effect on the scale at 220/sup 0/C, but it reduced the scales at 125 and 90/sup 0/C by factors of 4 and 18, respectively, and it also has activity as a corrosion inhibitor. Other promising compounds are PAE HCl (Dynapol poly(aminoethylene, HCl salt)), which also somewhat reduces the 220/sup 0/C scale; Ethoquad 18/25 (Armak methyl polyoxyethylene(15) octadecylammonium chloride); and Mirapol A-15 (a Miranol Chemical polydiquaternary compound). The best additive formulation for the brines of the Salton Sea Geothermal Field appears to be a mixture of one of these silica precipitation inhibitors with a small amount of hydrochloric acid and a phosphonate crystalline deposit inhibitor. Speculations are presented as to the mechanism of inhibition of silica precipitation and recommendations for further testing of these additives.},
doi = {10.2172/5647656},
url = {https://www.osti.gov/biblio/5647656}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Feb 01 00:00:00 EST 1980},
month = {Fri Feb 01 00:00:00 EST 1980}
}