High-base-number magnesium sulfonate detergent and preparation method thereof

Abstract

The invention discloses a preparation method of a high-base-number magnesium sulfonate detergent. The preparation method comprises the following steps of: adding a solvent accelerator and base oil into a reaction kettle at one time, and starting stirring at the stirring speed of 500r / min; adding organic acid at one time, and heating the reaction kettle to 40-45 DEG C; adding magnesium oxide equivalently in four times, performing stirring for 3-5 min, then performing constant-temperature stirring, introducing acid gas of which the gas amount is matched with the mass of the magnesium oxide, and the gas introduction time each time ranging from 1.5-2 h; and heating the reaction kettle to 150 DEG C after finishing the introduction of the acid gas, carrying out reduced pressure distillation, removing all solvents, stopping reducing pressure until the flash point is qualified, and adding a proper amount of filter aid for filter pressing to obtain the high-base-number magnesium sulfonate detergent. The high-base-number magnesium sulfonate detergent is prepared by adding high-base-number sulfurized calcium alkyl phenolate. The high-base-number sulfurized calcium alkyl phenolate has good dispersibility, can promote uniform dispersion of magnesium carbonate in a system, promotes continuous reaction, increases the reaction probability of the organic acid and magnesium carbonate, improves the utilization rate of the magnesium carbonate, reduces raw material consumption and raw material residue, and improves productivity and yield.

Description

technical field [0001] The invention belongs to the technical field of lubricating oil additives, in particular to a high-basic value magnesium sulfonate detergent and a preparation method thereof. Background technique [0002] With the continuous development of my country's industry, the application of large-scale heavy oil generators and turbines is becoming more and more extensive, and the amount of oil products used in them - residual oil, heavy fuel oil and high sulfur fuel oil getting bigger. However, the corrosion caused by vanadium in heavy fuel oil, the acid corrosion caused by sulfur and nitrogen combustion products, and the pollution to the environment have become an urgent task that must be solved at present, and have attracted widespread attention from all walks of life. [0003] Magnesium sulfonate with high alkalinity has strong neutralizing ability and excellent antirust performance. It has a strong adsorption effect on the paint film and carbon deposits gen...

AI Technical Summary

Problems solved by technology

[0005] In the existing preparation method, the utilization rate of magnesium oxide is low, resulting in low production capacity and low yield

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