Chlorine-free low-base-number calcium sulfonate detergent and preparation method thereof

Abstract

The invention discloses a preparation method of a chloride-free low-base-number calcium sulfonate detergent. The preparation method is characterized by comprising the following steps: adding a solvent accelerator, organic amine, base oil, inorganic calcium salt and organic acid into a reaction kettle at one time, stirring for reaction, after the reaction is finished, heating the system to 150 DEG C, and carrying out reduced pressure distillation to remove all solvents in the system, and after the distillation is finished, adding a proper amount of filter aid, and carrying out filter pressing to obtain the chlorine-free low-base-number calcium sulfonate detergent finished product. According to the chlorine-free low-base-number calcium sulfonate detergent, organic amine is used for replacing inorganic salt, the calcium sulfonate detergent without containing Cl <-> is synthesized, a traditional product containing Cl <-> is replaced, and the market requirement that novel or high-end internal combustion engine oil replaces medium-grade and low-grade internal combustion engine oil is met.

Description

technical field [0001] The invention belongs to the technical field of lubricating oil additives, in particular to a chlorine-free low-basic value calcium sulfonate detergent and a preparation method thereof. Background technique [0002] Low base value sulfonate is one of the series of sulfonate metal detergents. Compared with medium, high alkali value and ultra-high alkali value sulfonate, although low alkali value sulfonate does not have alkali storage performance, it highlights the solubilization, dispersion and rust prevention of sulfonate metal detergents. Function, especially under the high-temperature operating conditions of supercharged diesel engines, it has excellent piston detergency, and has advantages over other types of low-alkali value metal detergents in terms of additive compatibility and cost price. Therefore, low base number sulfonate plays an important role in the compound formulation of internal combustion engine oil. At present, low alkali value calc...

AI Technical Summary

Problems solved by technology

[0005] At present, due to the presence of chloride ions, hydrochloric acid will be produced during the use of internal combustion engine oil, which will not only corrode steel parts, but also cause the base value of the oil to decrease and the acid value to increase, which will affect the working performance of the oil and accelerate oil production. product aging, resulting in oil loss and shortened service life

Images