| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: overall, the invention relates to oil compositions, mainly liquid fuel compositions and oil compositions derived therefrom. A crude oil composition is described, for producing oil with improved fluidity at low temperature, containing crude oil and an effective amount of a depressant composition, which contains at least a depressant of formula (I): , where R1, R2 and R3 are independently selected from hydrocarbon groups which contain up to 50 carbon atoms, R4 is selected from NH or O and n is an integer from 0 to 50, under the condition that, the crude oil composition contains less than 20% carbon. Described also is a method of improving rheological properties of oil, a lubricating oil composition, a method of improving rheological properties of lubricating oil, a crude oil composition and a method of improving rheological properties of crude oil. ^ EFFECT: obtaining oil with improved rheological properties at low temperature. ^ 35 cl, 1 tbl, 1 ex |
