Compound diesel oil pour point depressant and preparation method and application thereof

Abstract

The invention relates to a compound diesel oil pour point depressant. The compound diesel oil pour point depressant is prepared from the following components in percentage by mass: 40-60% of polytetradecyl methacrylate-maleic anhydride, 10-20% of methyl acetate, 10-30% of ethyl acetate, 5-20% of triethylamine, and 10-20% of dicyclohexylamine. A preparation method comprises the steps that S1, all the components are mixed according to the proportion and evenly stirred, and thus a primary mixed solution is obtained; and S2, the primary mixed solution is dispersed again through an ultrasonic generator, and thus the compound diesel oil pour point depressant is obtained. Compared with the prior art, the diesel oil pour point depressant composition is wide in application range and can be suitablefor all diesel oil in the current market, the dispersity of the pour point depressant in the 0# diesel oil available in the market can be improved, the condensation point of the diesel oil can be decreased by 15-20 DEG C, and the cold filter plugging point of the diesel oil can be decreased by 4-9 DEG C.

Description

technical field [0001] The invention relates to the field of research and development of diesel oil low-temperature flow modifiers, in particular to a composite diesel pour point depressant and its preparation method and application. Background technique [0002] Diesel, as a widely used mineral oil, has a very broad development and application prospect because of its high thermal power, strong dynamics, relative energy saving and many other advantages. However, the problem of low-temperature fluidity of diesel has been restricting its development, and this conflict has aroused people's strong attention. Diesel pour point depressant is an oil-soluble polymer or condensate, which can improve the crystallization process of wax in diesel oil by virtue of its own molecular characteristics, thereby significantly reducing the cold filter point and freezing point of diesel oil, and effectively improving the low-temperature fluidity of diesel oil . However, the current pour point ...

AI Technical Summary

Problems solved by technology

However, the problem of poor low-temperature fluidity of diesel has been restricting its development, and this conflict has aroused people's strong attention

Its formula only uses conventional pour point depressants and esters for mixing and compounding, but it does not fundamentally change the problem of poor dispersion of existing pour point depressant products in diesel oil, and the final pour point depressant effect is not ideal

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