Patent ID: 8857527

Claim:
A nonionic, non-emulsifying surfactant composition comprising: a nonionic, non-emulsifying surfactant of the formula: RO—(CR 1 R 2 CR 3 R 4 O) x (C 2 H 4 O) y —H where R is selected from the group of branched alkyl, cyclic alkyl, and alkaryl groups having 3 to 11 carbon atoms; R 1 , R 2 , R 3 , and R 4 are each independently selected from the group of H, branched alkyl, linear alkyl, cyclic alkyl, or alkaryl groups having 1 to 6 carbon atoms; with the proviso that one or more of the following apply: that R 1 , R 2 , R 3 , and R 4 cannot all be H, the sum of carbon atoms in R 1 +R 2 +R 3 +R 4 is less than or equal to 8; x is from 1.5 to 11 inclusive when the sum of carbon atoms in R 1 +R 2 +R 3 +R 4 is equal to 1; x is an integer from 1 to 2 inclusive when the sum of carbon atoms in R 1 +R 2 +R 3 +R 4 is equal to 2 to 8; and y is an integer from 6 to 25 inclusive; carbon dioxide in a liquid or supercritical phase; and water.