US 10,590,331 B2 · Mixed dimers from alpha-olefin sulfonic acids

Abstract

Mixed dimer and mixed oligomer compositions are disclosed. The mixed dimer compositions comprise a monosulfonated cross-dimer or a salt thereof. The monosulfonated cross-dimer is a reaction product of (a) an alpha-olefin sulfonic acid (AOS acid); and (b) an unsulfonated olefin, an unsulfonated olefin precursor, or a functionalized olefin. The mixed oligomer compositions comprise a mono- or polysulfonated cross-oligomer or a salt thereof. The mono- or polysulfonated cross-oligomer is a reaction product of (a) an AOS acid; and (b) an unsulfonated diolefin or an unsulfonated diolefin precursor. Various methods for making the mixed dimer or oligomer compositions are described. Salts of the mixed dimer and oligomer compositions are useful surfactants for foams used in oilfield and other applications. The foams have improved high-temperature stability when compared with foams from AOS dimer acid salts.

Claims20

Dependent claims

A mixed dimer composition comprising a monosulfonated cross-dimer, or a salt thereof, of:

(a) an alpha-olefin sulfonic acid (AOS acid);
and
(b) an unsulfonated olefin, an unsulfonated olefin precursor, or a functionalized olefin.

Dependencies are inferred from the claim text.

Facts

Application

15/750,026Filed 28 Jul 2016 · us provisional application

Priority

4 Aug 2015

Published

US 2018/0223173 A19 Aug 2018

Granted

17 Mar 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification19 codes

C09K 8/592
Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids:…
C07C 303/20
Of sulfonic acids or halides thereof: by addition of sulfurous acid or salts thereof to compounds having carbon-to-carbon multiple bonds
C07C 303/22
Of sulfonic acids or halides thereof: from sulfonic acids, by reactions not involving the formation of sulfo or halosulfonyl groups; from sulfonic…
C07C 309/04
Of an acyclic saturated carbon skeleton: containing only one sulfo group

Mixed dimers from alpha-olefin sulfonic acids

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Mixed dimers from alpha-olefin sulfonic acids

Life of this patent

Abstract

Claims20