WAX-CONTAINING LIQUID COMPOSITION, DEPRESSANTS BASED ON THE LATTER, AND METHOD FOR LOWERING FLOW TEMPERATURE OF WAX-CONTAINING LIQUID Russian patent published in 2000 - IPC

FIELD: crude oil treatment reagents. SUBSTANCE: invention relates to substances used for lowering flow temperature of wax-containing liquid hydrocarbons. Such depressant is, in particular, prepared by reaction of hydrocarbyl- substituted phenol, in which hydrocarbyl radical contains more than 30 carbon atoms, with C₁-C₁₂-aldehyde or its precursor. More specifically, depressant can be employed for treatment of crude oils with flow temperatures 4 C or higher. EFFECT: improved depressant efficiency. 13 cl, 1 dwg, 16 ex