▎ 摘　　要

NOVELTY - The production of extreme pressure wear resistant agent involves dissolving lanthanum bromide in distilled water, stirring to obtain clear and transparent liquid, dripping the solution containing graphene modified with polymeric ionic liquid and sodium carbonate, stirring, making the solution to turn immediately to white turbidity state, reacting, filtering, washing precipitate several times with distilled water, washing with anhydrous ethanol, washing with potassium tetrafluoroborate aqueous solution for 5-15 times, exchanging the particle, drying the sample and grinding. USE - Production method of extreme pressure wear resistant agent for energy-saving environmentally-friendly engine oil (claimed). ADVANTAGE - The extreme pressure wear resistant agent has excellent carrying capacity and ensures resistance to extreme pressure. The engine oil is energy saving and environmentally-friendly. DETAILED DESCRIPTION - The production method of extreme pressure wear resistant agent involves dissolving 50-70 g lanthanum bromide in distilled water, stirring to obtain clear and transparent liquid, dripping the solution containing 150-180 g graphene modified with a polymeric ionic liquid and 25-40 g sodium carbonate, vigorously stirring, making the solution to turn immediately to white turbidity state, reacting at constant temperature for 1-3 hours, completing the reaction, leaving still, filtering, washing precipitate several times with distilled water, washing with anhydrous ethanol for 5-20 times, finally washing with potassium tetrafluoroborate aqueous solution for 5-15 times, exchanging the particle, drying the sample and grinding. An INDEPENDENT CLAIM is included for an energy-saving environmentally-friendly engine oil, which comprises 70-90 pts. wt. base oil, 0.1-0.5 pt. wt. wear resistant agent, 0.5-1.5 pts. wt. extreme pressure wear resistant agent, 0.1-0.5 pt. wt. high temperature antioxidant, 2-6 pts. wt. detergent, 3-5 pts. wt. dispersant, 5-10 pts. wt. viscosity index improver, 0.1-0.3 pt. wt. pour point depressant and 0.0001-0.0002 pt. wt. defoamer.