3results about How to "Good demulsibility" patented technology

The present application relates to the technical field of lubricating oil, and particularly relates to a special lubricating oil composition for gear box of port machinery equipment and a preparation method thereof.The preparation method of the present application comprises the following steps: preparing a graphene oxide lubricating additive by using graphene oxide and part of base oil; stirring uniformly extreme pressure anti-wear agent, rust inhibitor, antioxidant, demulsifier, pour point depressant, viscosity index modifier and the remaining part of base oil, then adding the graphene oxide lubricating additive and anti-foaming agent, continuing to stir and mixing uniformly to obtain the special lubricating oil composition for gear box of port machinery equipment.The lubricating oil composition prepared by the preparation method of the present application has excellent load-carrying and anti-wear performance, unique anti-micro-pitting performance, excellent oxidation resistance, low-temperature fluidity and water separation performance and the like, and is suitable for gear box lubrication working under harsh working conditions such as heavy load, impact load and low-temperature environment.

This invention provides a hydraulic oil prepared from the following raw materials: 0.1-1.0 wt% ionic liquid, 0.5-1.5 wt% hydraulic oil compound, and the balance base oil. This application also provides a method for preparing the ionic liquid. Furthermore, this application also provides a method for preparing the hydraulic oil. Compared with traditional ionic liquids containing fluorine, imidazole, and other groups, the ionic liquid provided in this application is prepared using bio-based raw materials, making it clean and environmentally friendly, and the synthesis steps are simple. The hydraulic oil provided in this application, after incorporating the ionic liquid, significantly improves its demulsification properties, and it also exhibits good extreme pressure anti-wear properties, excellent friction-reducing properties, and can solve the practical engineering problem of hydraulic cylinder vibration.

This invention relates to the field of lubricating oil technology, and discloses an 80W-90 locomotive gear oil, its preparation method, and its application. Based on the total weight of the 80W-90 locomotive gear oil, it contains 50wt%~90wt% coal-based base oil, 5wt%~20wt% synthetic ester, 2wt%~7wt% extreme pressure anti-wear agent, 0.5wt%~3wt% antioxidant, 0.1wt%~0.7wt% pour point depressant, 0.001wt%~0.04wt% antifoaming agent, 0.05wt%~10wt% metal deactivator, 1wt%~8wt% viscosity index improver, 0.5wt%~1wt% rust inhibitor, and 0.02wt%~0.3wt% demulsifier. The 80W-90 locomotive gear oil exhibits excellent extreme pressure anti-wear properties, load-bearing capacity, pitting corrosion resistance, low-temperature fluidity, and thermal oxidation stability.