A kind of polyarylate alcoholysis type ternary polymer diesel oil pour point depressant and preparation method thereof

Abstract

The invention belongs to the technical field of pour point reducers, and particularly relates to a poly-aromatic alcoholysis-type ternary polymer diesel pour point reducer and a preparation method thereof. The pour point reducer is a ternary polymer obtained by polymerizing three monomers, i.e., undecylenic acid benzyl ester, maleic anhydride and styrene and performing the esterification with high alcohols. A condensation point and a cold filter plugging point of the diesel can be effectively improved. The pour point reducer disclosed by the invention has the advantages of simple synthetic method, cheap raw materials, less additive dosage, stable performance, good pour point reduction effect and the like.

Description

technical field The invention relates to a polyaryl alcoholysis type ternary polymer pour point depressant and a preparation method thereof, belonging to the technical field of pour point depressants. Background technique Diesel is generally made by blending two or more components. At present, the blending components of diesel in industrial production include: straight-run, catalytic diesel, coking diesel and hydrocracked diesel. The blended diesel is middle distillate oil. The general boiling range is between 170°C and 390°C, containing normal alkanes, olefins, aromatics and some other polar and non-polar compounds. Linear alkanes have the lowest solubility in fuel oil. When the temperature is lower than the cloud point of diesel oil, linear alkanes will form wax and be separated from fuel oil. The distribution of these n-waxes is generally at C 10 ~C 25 Within the range, when the carbon chain length of the normal wax molecule increases, its solubility in diesel oil will...

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Problems solved by technology

At present, there are many types of pour point depressants at home and abroad, mainly including comb polymer type, polyacrylic acid higher carbon alcohol ester type, ethylenically unsaturated ester polymer type, etc. In addition, the common disadvantage of diesel oil pour point depressants in my country is that pour point depressant does not depress filter. Research on pour point depressants that can significantly reduce the cold filter point of oil products is the focus of future research.

In view of the shortcomings of some domestic diesel pour point depressants that have no filtration effect on paraffin-based diesel or that the filtration effect does not decrease but rises and has poor universality, we have developed a new type of diesel pour point depressant.

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