Improving agent for improving low-sulfur diesel lubricating property and synthetic method of improving agent

Abstract

The invention relates to an improving agent for improving low-sulfur diesel lubricating property and a synthetic method of the improving agent. The method includes the steps: adding unsaturated monocarboxylic acid into a premixing tank of an impinging stream reactor, and heating the unsaturated monocarboxylic acid to reach the temperature of 80-100 DEG C; slowly leading tung oil biodiesel into thepremixing tank, conveying mixed liquid in the premixing tank into a feeding port of the impinging stream reactor by a circulating pump, enabling the mixed liquid to flow to a material impinging areathrough a flow guide cylinder at high speed to perform impinging reaction, controlling reaction temperature to be 110-150 DEG C, enabling the materials after impinging to reflow the premixing tank from discharging ports in two sides, conveying the materials into the feeding port of the reactor by the circulating pump to perform continuous operation, and continuing to run for a certain time after the tung oil biodiesel is completely added; performing pressure reduction distillation on the materials after reaction to obtain an improving agent product. The synthesized improving agent can improveabrasion resistance of low-sulfur diesel and low in condensation point, the blending proportion of the improving agent and the low-sulfur diesel is low, and the blended low-sulfur diesel can meet state V lubricating standards.

Description

technical field [0001] The invention belongs to the field of oil additives, and in particular relates to an improver for improving the lubricity of low-sulfur diesel oil and a synthesis method thereof. Background technique [0002] With the widespread use of diesel engines, the consumption of diesel is increasing year by year. However, a large amount of diesel consumption will inevitably lead to further aggravation of vehicle emissions of harmful substances. Due to the serious impact of emissions on the ecological environment, human health and economic development, governments of various countries have successively formulated strict emission regulations to limit the harmful emissions of diesel vehicles. With the implementation of the National IV and National V standards for diesel in my country, the sulfur content of diesel will drop below 10ppm, and desulfurized diesel has been implemented in domestic refineries. At present, sulfur reduction technologies such as hydrotrea...

AI Technical Summary

Problems solved by technology

In the prior art, the polar groups of diesel antiwear agents are all at the end of the molecular chain, such as long-chain fatty acids, etc., and the entanglement of the non-polar long chain belongs to unilateral entanglement, which requires a relatively large polarity and acid value. Therefore, the acid value of the existing acid type antiwear agent products is usually ≮190mgKOH / g, which is easy to cause corrosion and other hazards to diesel engines, and its antiwear performance needs to be further improved

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