FIELD: oil-and-gas production.
SUBSTANCE: invention relates to a mixture for deep dehydration and desalination of a water-oil emulsion, which contains a block copolymer of ethylene and propylene oxides and a solvent. The ethylene block copolymer and propylene oxides are in form of polyether, obtained from polymerisation of propylene oxide with glycerin or glycol with subsequent copolymerisation with ethylene oxide, with molecular weight of 4000-6000, and additionally polyoxypropylene polyol with molecular weight of 50000-300000. The solvent used is either C1-C3 alcohol or an aromatic hydrocarbon with the following ratio of components, wt %: polyether 5-50; polyoxypropylene polyol 3-40; solvent - the rest.
EFFECT: mixture has high demulsifying activity in a wide temperature range.
4 ex, 2 tbl
