FREMGANGSMAATE FOR UTVINNING AV OLJE

A process for enhanced oil recovery using anionic surfactants selected from esters of alpha - sulfocarboxylic acids, more particularly from the mono-and di-esters of the formula: wherein R is a monovalent hydrocarbon radical R' a monovalent hydrocarbon radical or a (poly-) oxyalkyl radical, R&#...

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Bibliographic Details
Main Authors MILEO, JEAN-CLAUDE, SILLION, BERNARD
Format Patent
LanguageNorwegian
Published 20.05.1992
Edition5
Subjects
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Summary:A process for enhanced oil recovery using anionic surfactants selected from esters of alpha - sulfocarboxylic acids, more particularly from the mono-and di-esters of the formula: wherein R is a monovalent hydrocarbon radical R' a monovalent hydrocarbon radical or a (poly-) oxyalkyl radical, R'' a divalent radical or a (poly)oxyalkylene and M<(+)> is an alkali metal cation, an ammonium ion or an alkaline-earth metal half-cation (1 DIVIDED 2 M<2+>). The esters of the alpha -sulfocarboxylic acids may be used as aqueous solutions or microemulsions. They are effective even in the presence of oil field waters having high salinity, particularly a high content of divalent cations (calcium and/or magnesium).
Bibliography:Application Number: NO19840002944