Preparation method of SN-grade gasoline engine oil being 5W/20 in viscosity

Abstract

The invention relates to a preparation method of SN-grade gasoline engine oil being 5W / 20 in viscosity. The preparation method includes the steps of: 1) blending of basic oil: mixing and uniformly stirring high-end PAO, hydrogenation isomerized basic oil and polyol ester, and allowing the mixture to stand for 20 min for later use; 2) blending of an additive: mixing and uniformly stirring polymethacrylate and polyisobutene, and allowing the mixture to stand for 10 min for later use; 3) blending of a functional agent: mixing and uniformly stirring petroleum synthetic barium sulfonate, zinc dialkyldithiophosphate and sodium molybdate, and allowing the mixture to stand for 10 min for later use; 4) preparation of mixed oil: uniformly mixing the blended basic oil and the blended additive, heating the mixture to 70 DEG C, and cooling the mixture to room temperature after 3 h to prepare mixed oil; and 5) adding the blended functional agent to the mixed oil, stirring the mixture uniformly, and performing suction filtration to prepare the finish product. The basic oil in the 5W / 20 SN-grade gasoline engine oil is finely selected. The functional agent herein ensures low pour point and excellent kinematic viscosity change value of the engine oil and also improves anti-oxidizing property in long-time usage significantly.

Description

technical field [0001] The invention belongs to the field of lubricating oil, in particular to a preparation method of SN grade gasoline engine oil with a viscosity of 5W / 20. Background technique [0002] With the development of the enterprise industry, especially the continuous innovation of gasoline engine technology, the introduction of mechanical and electronic technology has effectively improved the performance of the engine, but most gasoline engines use engine oil that is not targeted enough for the above technologies, and only meets the traditional requirements. Lubrication performance has been unable to achieve effective maintenance of gasoline engines. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method for preparing SN grade gasoline engine oil with a viscosity of 5W / 20, which is helpful for the complete combustion of fuel oil and significantly reduces the emission of exha...

AI Technical Summary

Problems solved by technology

[0002] With the development of the enterprise industry, especially the continuous innovation of gasoline engine technology, the introduction of mechanical and electronic technology has effectively improved the performance of the engine, but most gasoline engines use engine oil that is not targeted enough for the above technologies, and only meets the traditional requirements. Lubrication performance has been unable to achieve effective maintenance of gasoline engines