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US 8,465,668 B2Granted
Surfactants with a polyethersulfonate structure method for production thereof and use thereof for tertiary crude oil production
AssigneeBASF SE
InventorsChristian Bittner, Oetter Günter, Ulrich Steinbrenner, Jürgen Huff, Marcus Guzmann
Life of this patent
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Abstract
Surfactants with polyether sulfonate structure, which have a propanonylsulfonic acid group as a head group, a process for preparing such surfactants and their use for tertiary mineral oil extraction.
Claims26
A surfactant of the general formula (I)
- where
- R1 is a straight-chain, branched, saturated or unsaturated aliphatic and/or aromatic hydrocarbon radical having from 6 to 30 carbon atoms,
- R2, independently for each of the k alkoxy units, are each hydrogen or a straight-chain, branched, aliphatic or aromatic hydrocarbon radical having from 1 to 10 carbon atoms,
- k is from 0 to 35 and
- M is H+ and/or an x-valent counterion 1/x Yx+.
2 more elements
Dependencies are inferred from the claim text.