FIELD: petroleum industry.
SUBSTANCE: invention relates to preventing asphaltene deposits during oil production, transportation, and processing and consists in solubilizing asphaltenes in hydrocarbon mixture, e.g. crude oil containing asphaltenes, to which effective amount of at least one dendrimer compound is added. Dendrimer compound is preferably super-ramified polyesteramide and, more preferably, polyesteramide obtained from succinic anhydride and diisoprepanolamine functionalized with poly(isobutenyl)succinic anhydride. Super-ramified polyesteramide having average molecular weight 500 to 50000 is prepared by condensation of a cyclic anhydride with di- or trialkanolamine, in particular diisopropanolamine. Asphaltene-solubilizing mixture, containing crude oil, asphaltenes, and at least one dendrimer compound additionally includes diluent in amount 0.01-1.0%.
EFFECT: enhanced solubilization efficiency.
11 cl, 2 tbl, 2 ex
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