Lubricating oil for methanol fuel engine, and preparation method thereof

Abstract

The invention provides lubricating oil for a methanol fuel engine, and a preparation method thereof, wherein the lubricating oil comprises, by weight, base oil and an additive, wherein the addition amount of the additive is 12.021-21.92% of the addition amount of the base oil, the base oil comprises three components of low-viscosity metallocene poly alpha olefin, medium-viscosity metallocene polyalpha olefin and high-viscosity metallocene poly alpha olefin, and the additive comprise eight components of a metal phenate, a dialkyl dithiophosphoric acid and carboxylic acid mixed zinc salt, an acid neutralizer, a mixed ashless dispersant, an antirust agent AR-CU, aminothioester, a 2# composite antifoaming agent and a demulsifying agent DL-32. According to the invention, the adverse effects such as coking, carbon deposition, viscosity reduction and the like caused by the damage of methanol to the viscosity index can be eliminated, the adverse effects such as rubber swelling and the like caused by methanol are solved, and the corrosion of methanol to cast irons, cast aluminum and copper parts and the emulsion corrosion caused by entering of methanol with water into a crankcase are eliminated.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a lubricating oil for methanol fuel engines and a preparation method thereof. Background technique [0002] Petroleum, as a non-renewable resource, is becoming less and less, and the development of alternative products for petroleum resources has become a major issue in the world's scientific and technological circles. As a coal conversion product, methanol can temporarily reduce the application ratio of petroleum resources. At present, with the increasing awareness of environmental protection in the world, the control of exhaust emissions has become an important part of environmental protection. As methanol is used as a fuel, the engine exhaust emission level is low, so methanol is used as a fuel for engines in various countries in the world. However, when methanol is used as fuel, the engine lubricating oil system will produce a series of technical probl...

AI Technical Summary

Problems solved by technology

However, when methanol is used as fuel, the engine lubricating oil system will produce a series of technical problems, such as: water derived from methanol combustion, methanol, etc. enter the crankcase, causing emulsification, corrosion, etc., and the lubricating oil currently available on the market cannot be used as methanol fuel. engine oil, so research and development of a new lubricating oil for methanol fuel engines has become an urgent need

Chinese patent application 2009102239548 provides a lubricating oil for methanol-fueled engines and its preparation method, by selecting a specific viscosity index improver (polymethacrylate ester) to prevent methanol from modifying the OCP in traditional lubricating oils It is resistant to the rapid aging of lubricating oil caused by methyl ether, but this lubricating oil does not consider the swelling of methanol on rubber and the corrosion of non-ferrous metals. Although it reduces the damage of methanol to viscosity index improvers, it is inevitable to use Viscosity index improver, can not eliminate this phenomenon

Images