Surfactant, process for its production and use
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United States of America Patent
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Jun 4, 1996
Grant Date -
N/A
app pub date -
Apr 5, 1994
filing date -
Jun 23, 1993
priority date (Note) -
Expired
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Abstract
A new class of surfactants exhibits properties, which make the surfactants suitable for use in surfactant flooding for enhanced oil recovery. The surfactants have the formula XA.sub.r ORSO.sub.3.sup.- M.sup.+ (I) where R is a hydrocarbon or hydroxyl-substituted hydrocarbon group with 2-6 carbon atoms; A is an oxyalkylene group having 2-4 carbon atoms; r is a number from 0-10, preferably 0-5 and most preferably 1-4; X is an hydroxyl group or hydroxyl and ether group containing hydrophobic group, which comprises 2-6, preferably 2-4 end groups containing 3-22 carbon atoms; and M is a cation, preferably a monovalent cation; or a C.sub.1-4 -alkyl ether thereof. A method for the manufacture of the surfactants are also enclosed.
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