Topical defoamer and demulsifier

摘要

Compounds of the formula H(CH2)zCOO-[C2H4O]xCyH2y+1 where z is 0-2, x is an integer from 1 to 5 and y is an integer from 4-9 are used as emulsion breakers and defoamers in formation treatment fluids in the recovery of hydrocarbons from subterranean formations. A preferred material has the formula HCOO-[C2H4O]3C6H7.