| abstract |
The invention thus provides crude oils and products which have been produced therefrom and comprise distillation residues, comprising at least one alkylphenol-aldehyde resin having a repeat structural unit of the formula n nwheren R 1 is a branched alkyl or alkenyl radical which has from 10 to 40 carbon atoms and bears at least one carboxyl, carboxylate and/or ester group, R 2 is hydrogen or R 1 R 3 is hydrogen or an alkoxy group of the formulan n-(A-O) m —H,n A is a C 2 - to C 4 -alkylene group, m is from 1 to 100, R 4 is hydrogen, a C 1 - to C 11 -alkyl radical or a carboxyl group, R 5 is C 1 -C 200 -alkyl or -alkenyl, O—R 6 or O—C(O)—R 6 , R 6 is C 1 -C 200 -alkyl or -alkenyl, n is from 1 to 100 and k is 1 or 2, the use of the alkylphenol-aldehyde resin for splitting emulsions of water and crude oils or products derived therefrom, the use of the alkylphenol-aldehyde resin for improving the cold flowability of crude oils and products derived therefrom, and the use of the alkylphenol-aldehyde resin as an asphaltene dispersant in crude oils and products derived therefrom. |