Diesel pour point depressant

Abstract

The invention provides a diesel pour point depressant which comprises the components by weight percent: (1) 20-30% of alkenyl butanediamide acid salt, (2) 15-20% of alpha-olefin and maleic anhydride copolymer, (3) 10-20% of ethylene-vinylacetate and (4) 30-50% of organic solvent. The diesel pour point depressant has better sensitibility for most diesel oil produced in China, low dosage and remarkable effect of reducing condensation point and cold filter plugging point. The invention also provides a preparation method of the diesel pour point depressant.

Description

technical field The invention relates to a diesel oil additive, more precisely, to a diesel oil pour point depressant for lowering the freezing point and cold filter point of diesel oil. Background technique Diesel pour point depressant, also known as diesel low temperature fluidity improver, is widely used in petroleum refining, transportation, storage and use. It is of great significance for increasing the ratio of diesel to gasoline, increasing the production of diesel and improving the economic benefits of refineries. Diesel pour point depressant is an ashless polymer that only has an effect on the low-temperature fluidity of oil, but has no effect on other properties. Its pour point depressant mechanism is based on changing the structure and size of wax by adsorption or eutectic with wax Therefore, the chemical structure of the pour point depressant has a decisive influence on the pour point depressant effect. It mainly includes polymers with ethylene backbones that ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned pour point depressants have certain limitations. Due to the single type of polymer in the components of some pour point depressants, or because the compounding of several polymers is not ideal, the scope of application of the existing pour point depressants is limited. , has little effect on some diesel oils, or lowers the condensation point and cold filter point too little

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