Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...
Patent
1992-12-10
1995-04-04
Hruskoci, Peter A.
Liquid purification or separation
Processes
Preventing, decreasing, or delaying precipitation,...
1662441, 166310, 210698, 210699, 210701, 210747, 252180, 422 13, 422 16, 422 17, C02F 514
Patent
active
054034930
ABSTRACT:
An aqueous scale inhibitor product is corrosive to the elongated feed lines of a geothermal well due to the length of such feed lines, extended residence time of the product therein, and/or the elevated internal temperatures reached therein, and such corrosivity of aqueous scale inhibitor products is reduced when the scale inhibitor actives are no more than about 10 weight percent of the aqueous solution, when the pH of such aqueous solution is raised to the range of from about 5.5, or 8, to about 12, when carbohydrazide is added to such product, and by combinations of such factors.
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Mouche Richard J.
Smyk Eugene B.
Drake James J.
Hruskoci Peter A.
Miller Robert A.
Nalco Chemical Company
Norek Joan I.
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