Stable forms of polyalkylaromatic sulfonates

Details Stable forms of polyalkylaromatic sulfonates Stable forms of polyalkylaromatic sulfonates

E - Fixed Constructions

21

B

31/31

E21B 43/22 (2006.01) C09K 8/592 (2006.01) E21B 43/24 (2006.01)

Patent

CA 1248343

ABSTRACT Polyalkyl aromatic sulfonates; and particularly dialklaromatic sulfonates, useful as surfactants in steam recovery methods for enhancing oil recovery from subterranean formations, have been found to comprise essentially mixtures of meta- and para-isomers obtaind by alkylating alkylaromatics, where the alkyl group has from 1 to 4 carbon atoms, with a C14-24 olefin. It has further been found that when the ratio of para-isomer to meta-isomer is increased in this mixture, a significantly more hydrolytically, thermally stable surfactant under steam recovery operating conditions in obtained.

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