Patent ID: 6172123
Filing Date: 2001-01-09
Classification: B01D,Y10S

Abstract:
A method for preventing formation of an oil and water mixture or breaking a mixture of oil and water comprising adding to oil and water in contact with each other or to said mixture a demulsifing effective quantity of at least one branched reaction product ofA) at least one linking compound of formula IR.sup.1 (X).sub.3 (I)wherein each X group is a halogen atom or one X group is a halogen atom and two X groups with two adjacent carbon atoms in the R.sup.1 group and an oxygen atom form an epoxy group, and R.sup.1 is an alkanetriyl group containing from 3 to 10 carbon atoms;B) at least one compound of formula II and/or formula IIIR.sup.2 (OA).sub.n OH (II)wherein R.sup.2 is an aliphatic group containing from 3 to 36 carbon atoms, n is a number of from 1 to 100, and each OA group is independently an ethyleneoxy, 1,2-propyleneoxy, or 1,2-butyleneoxy group,R.sup.2 (OA).sub.n NH.sub.2 (III)wherein R.sup.2, OA and n have the meanings given above for formula II, and optionally, one or more of the following components:C) a polyol containing at least 2 hydroxyl groups, one or more of which can be optionally alkoxylated; andD) a polyamine containing at least two amine groups, one or more of which can be optionally alkoxylated;wherein when the branched reaction product consists only of components A) and B), the mole ratio of component A) to component B), is from about 0.5:1 to about 5:1, and when the branched reaction product also contains at least one of components C) and/or D), the mole ratio of component A) to the sum of the OH and amine equivalents in components B), C) and/or D) is from about 0.5:1 to about 0.99:1.