Bisamides, a process for their preparation and their use

Abstract

Bisamides of the formula ##STR1## wherein R denotes the alkyl skeleton of a dimerized fatty acid having 22 to 42, preferably 34, C atoms, R.sub.1 denotes hydrogen or a group of the formula --(C.sub.n H.sub.2n --X).sub.a --Z.sub.v --R.sub.2, R.sub.2 denotes hydrogen or a group --COR.sub.3, R.sub.3 denotes C.sub.1 -C.sub.22 -, preferably C.sub.8 -C.sub.22 -alkyl, X denotes an oxygen atom or a group of the formula N--B.sub.m, B denotes hydrogen, methyl, ethyl, benzyl or a group of the formula --Z.sub.v --R.sub.2, n denotes a number from 2 to 6, preferably 2 or 3, a denotes a number from 0 to 5, v denotes a number from 0 to 100, preferably 0 to 20, Z denotes a group of the formula --C.sub.2 H.sub.4 X(C.sub.3 H.sub.6 X).sub.b or CH.sub.2 --CHY O or C.sub.n H.sub.2n, b denotes a number from 0 to 5, preferably 0, 1 or 2, i denotes a number from 0 to 2(a+b)+2 and A denotes an anion, m denotes a number from 1 to 2 and Y denotes hydrogen, methyl or ethyl, a process for their preparation and their use as demulsifiers for crude oil emulsions.

Dependencies are inferred from the claim text.