Alkylated biphenylyl phenyl ether sulfonates
AssigneeThe Dow Chemical Company
InventorPaul E. Hinkamp
Life of this patent
Estimating the term…
Abstract
The title compounds are of the formula ##STR1## wherein R is an alkyl radical of at least 6 carbon atoms and each R can be the same or different; M.sym. is hydrogen, alkali metal ion, alkaline earth metal ion or ammonium ion radical and each M.sym. can be the same or different; a, b and c are individually integers of 0 or 1 with the proviso that the .SIGMA.(a+b+c) is equal to 2 or 3; and x, y and z are individually integers of 0-2 with the proviso that .SIGMA.(x+y+z).gtoreq.1. These compounds demonstrate good tolerance to multivalent cations, such as the cations of calcium and magnesium, good resistance to hydrolysis and are useful surfactants in enhanced oil recovery processes.
Claims5
Alkylated biphenylyl phenyl ether sulfonates of the formula ##STR6## wherein R is an alkyl radical of at least 6 carbon atoms and each R can be the same or different;
- M.sup..sym. is hydrogen, alkali metal ion, alkaline earth metal ion or ammonium ion radical and each M.sup..sym. can be the same or different;
- a, b and c are individually integers of 0 or 1 with the proviso that the .SIGMA.(a+b+c) is equal to 2 or 3;
- and
- x, y and z are individually integers of 0-2 with the proviso that .SIGMA.(x+y+z).gtoreq.1.
Dependencies are inferred from the claim text.