| abstract |
New bisimidazolines of the formula ##STR1## wherein R denotes the alkyl skeleton of a dimerised fatty acid having 22 to 42, preferably 34, C atoms, n X denotes an oxygen atom or a group of the formula >N--B m , n B denotes hydrogen, methyl, ethyl, benzyl or a group of the formula --(CH 2 CHYO) n --R 1 , n Y denotes hydrogen, methyl or ethyl, n R 1 denotes hydrogen or a group --COR 2 , n R 2 denotes C 1 -C 22 , preferably C 8 -C 22 , alkyl, n a denotes 0 or 1, b denotes a number from 0 to 4, m denotes 1 or 2, n denotes a number from 0 to 100, preferably 0 to 20, i denotes a number from 0 to 2b+2 and A denotes an anion. n A process for their preparation and their use a demulsifiers for crude petroleum emulsions. |