VERFAHREN ZUR BEKÄMPFUNG DER KESSELSTEINBILDUNG

A method for inhibiting the formation of scale in waters having a high barium content and low pH comprises the addition of an aqueous solution of a phosphonate of formula: wherein Z = - CHR PO3R2 R = H, CH3, C2H5 or M R = H, CH3, CR3, C6H5,SO3H2 M = alkali metal or ammonium ion n = 2 - 6, preferably...

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Bibliographic Details
Main Authors WALKER, PATRICA ALEXANDRA MARY, COMPANY P.L.C, CHERTSEY ROAD, PETROLEUM COMPANY P.L.C, CHERTSEY ROAD, STEWART, NEVIN JOHN
Format Patent
LanguageGerman
Published 15.11.1995
Edition6
Subjects
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:A method for inhibiting the formation of scale in waters having a high barium content and low pH comprises the addition of an aqueous solution of a phosphonate of formula: wherein Z = - CHR PO3R2 R = H, CH3, C2H5 or M R = H, CH3, CR3, C6H5,SO3H2 M = alkali metal or ammonium ion n = 2 - 6, preferably 2-4 m = 2 - 6, preferably 2-4 a = 2 - 10, preferably 2-4 b = 2 - 10, preferably 2-6 x = 0 - 6, preferably 0-3 y = 0 - 6, preferably 0-2 provided that when y=o at least one of n or m is greater than 2. The phosphonates may be present in the form of a fully or partially neutralised salt and may be injected into production fluids obtained from an underground reservoir or injected into the reservoir via a wellbore as part of a squeeze technique.
Bibliography:Application Number: AT19910308627T