Environment-friendly fully-synthetic diesel engine oil and preparation method thereof

Abstract

The invention relates to the technical field of lubricating oil, and particularly provides environment-friendly fully synthetic diesel engine oil which is composed of the following components in partsby weight: 77.2 parts of base oil, 5 parts of a detergent, 3 parts of an ashless dispersant, 1.2 parts of an antirust agent, 0.7 parts of an antioxidant, 4.4 parts of an extreme pressure agent, 0.5 parts of a friction modifier, 7.7 parts of a viscosity index improver, 0.3 parts of a pour point depressant, 0.3 parts of an anti-foaming agent, and 50 ppm of a demulsifying agent. The base oil is prepared by mixing mPAO8 which is catalytically synthesized by adopting metallocene, deeply hydrogenated and optimized straight-chain third-class mineral oil 250N and phthalate, and the mass ratio of mPAO8 to third-class mineral oil 250N to phthalate is 2: 2: 1. The low-viscosity diesel engine oil has the advantages that the base oil is blended according to a scientific proportion, the low-temperaturefluidity of the oil product is effectively improved, the oxidation resistance of the oil product is improved, the oil change period of the oil product is prolonged, the pollution degree of waste oilto the environment is reduced, the energy loss of the low-viscosity diesel engine oil is reduced, and the transmission efficiency of an engine is improved.

Description

Technical field [0001] The invention relates to the technical field of lubricating oil, in particular to an environmentally-friendly fully synthetic diesel engine oil and a preparation method thereof. Background technique [0002] Diesel engine oil is an important branch of vehicle lubricants. Diesel engines are compression ignition internal combustion engines. Diesel engines use compressed air to increase the air temperature above the spontaneous ignition point of diesel, and then inject diesel fuel. The diesel oil mist and air are mixed and self-ignite and burn. Compared with gasoline engines, diesel engines have high thermal efficiency, good fuel economy, and cheap heavy oil. The fuel consumption rate is low, followed by a wide range of power and speed, and good environmental protection. Compared with gasoline engines, carbon dioxide emissions are about 30-35% lower. Therefore, the application field is wide, so the demand for diesel engine oil is increasing. [0003] China's ...

AI Technical Summary

Problems solved by technology

At present, CH-4 and CI-4 products on the market still occupy a large share in the field of heavy truck diesel engine oil. However, their oil change intervals are short and cannot meet the latest National V and National VI emission requirements. Therefore, various lubricating oil manufacturers and Additive manufacturers have conducted in-depth research in this field, researching a diesel engine oil that can meet the long oil change interval and be environmentally friendly, and can also be compatible with the exhaust emission device, especially the DPF. Mileage, High Efficiency Protection, Diesel Reduction, Improved Fuel Economy Features

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