HYPER-BRANCHED POLYESTERS AND POLYCARBONATES AS DE-EMULSIFIERS FOR DESTRUCTION OF CRUDE OIL EMULSIONS Russian patent published in 2014 - IPC C08G63/20 C08G64/02 C10G33/04 B01D17/04 C08G64/14 

FIELD: chemistry.

SUBSTANCE: invention relates to application of hyper-branched polyesters and polycarbonates as de-emulsifiers for destruction of crude oil emulsions. Claimed is application of non-dendrimer highly functional hyper-branched polyesters and polycarbonates, which can be obtained by interaction of (i) at least one aliphatic, cycloalyphatic, arylaliphatic or aromatic dicarboxylic acid (A₂) or its derivatives or organic carbonates (A₂'), (ii) at least one x-atomic aliphatic, cycloaliphatic, arylaliphatic or aromatic alcohol (C_x), which contains more than two hydroxyl groups, and x stands for number larger than 2, preferably the number from 3 to 8, especially preferably from 3 to 6, even more preferably 3 or 4, in particular 3, and (III) at least one alkoxylated fatty acid amide (D), selected from the group, including alkoxylated amides of saturated or unsaturated fatty acids with 2-30 carbon atoms, which on the average contain from 1 to 40 structural units of alkylene oxide as de-emulsifiers for destruction of crude oil emulsions.

EFFECT: de-emulsifier makes it possible to destroy crude oil emulsion very quickly, still on the way to preparatory installation, at the temperature of freshly extracted emulsion.

7 cl, 1 tbl, 3 ex