9results about How to "Good demulsibility" patented technology

The invention relates to the technical field of lubricating oil, and provides a marine tail shaft oil composition as well as a preparation method and application thereof. The marine tail shaft oil composition comprises the following components in parts by weight: 1-5 parts of a clearing agent, 1-5 parts of a dispersing agent, 1-5 parts of an antioxidant, 0.01-1 part of a pour point depressant, 0.01-0.5 part of an anti-foaming agent and 83.5-96.98 parts of base oil, wherein the clearing agent comprises high-base-number synthetic calcium sulfonate and high-base-number sulfurized calcium alkyl phenolate. The marine tail shaft oil composition provided by the invention has excellent water diversion and anti-emulsification performance, still has good comprehensive performance in a water-containing environment, and completely meets the requirements of using working conditions of a marine tail shaft.

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.

The invention discloses a lubricating oil composition for a low-ultimate-pressure vacuum pump and a preparation method of the lubricating oil composition. The lubricating oil composition is prepared from the following raw materials in percentage by mass: 0.1 to 1.0 percent of double-ion liquid, 0.2 to 2.0 percent of an antioxidant, 0.005 to 0.05 percent of a demulsifying agent, 0.005 to 0.05 percent of an anti-foaming agent and the balance of base oil. The lubricating oil composition for the low-ultimate-pressure vacuum pump not only has relatively excellent comprehensive properties (anti-rust property, corrosion resistance, wear resistance, oxidation resistance, demulsibility and anti-foaming property), but also is simple in preparation process, easy to operate and wide in application range. According to the designed low-limit-pressure vacuum pump, after the prepared lubricating oil composition is used, the positions of a bearing, a gear and the like of the low-limit-pressure vacuum pump have excellent anti-rust performance, corrosion resistance and the like, and therefore the low-limit-pressure vacuum pump has the long service life and the wide application range.

The invention discloses a lubricating oil composition for a variable-volume vacuum pump and a preparation method of the lubricating oil composition. The lubricating oil composition is prepared from the following raw materials in percentage by mass: 0.1 to 1.0 percent of double-ion liquid, 0.001 to 0.02 percent of demulsifying agent, 0.001 to 0.02 percent of anti-foaming agent and the balance of base oil. The lubricating oil composition for the variable-volume vacuum pump has excellent anti-rust property, corrosion resistance, oxidation resistance, demulsibility and anti-foaming property, and has a wide application prospect. The method for preparing the lubricating oil composition for the variable-volume vacuum pump is simple in process, easy to operate and wide in application range.

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.

The invention provides an air compressor oil complexing agent, a preparation method thereof and air compressor oil, and relates to the technical field of air compressor oil. The air compressor oil complexing agent provided by the invention has excellent oxidation resistance, can reduce the generation of oil sludge and coke, and keeps good demulsification performance at the same time. Besides, the complexing agent disclosed by the invention has excellent oil solubility and flowability, reduces the difficulty of large-scale production, and is suitable for various base oils including poly-alpha olefin and poly (alkylene) glycol base oils, so that the service life of the air compressor oil is longer, the operation efficiency of equipment is improved, and the maintenance cost is reduced.

The invention discloses a high-pressure long-life engineering machinery hydraulic oil and a preparation method thereof, belonging to the technical field of engineering machinery hydraulic oil, and its composition includes, by mass percentage: antiwear agent 0.3%-0.5%, antioxidant 0.2%-0.40%, rust inhibitor 0.10%-0.20%, metal deactivator 0.01%-0.03%, friction reducer 0.1%-0.2%, pour point depressant: 0.1-0.15%, defoamer 0.01%-0.02%, demulsifier: 0.0002-0.0003%, and the balance is base oil. The composite antiwear agent selected by the present invention is coordinated with the dialkyl dithiocarbamate molybdenum friction reducer, which can protect the hydraulic system parts from wear, extend the service life of hydraulic equipment, and achieve energy-saving effect. The formula of the present invention does not contain zinc element, which is an ashless engineering machinery hydraulic oil, does not corrode copper and silver parts, is more suitable for hydraulic parts with copper or silver, reduces the occurrence of failures, and extends the service life of oil products.

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.

The present invention provides a fully synthetic high-temperature chain oil, comprising the following components: 42-62 parts of coal-based synthetic oil CTL, 30-50 parts of polyethylene synthetic oil LPE, 3-10 parts of ester synthetic oil, 0.3-1 parts of high-temperature antioxidant, 0.5-1.5 parts of extreme pressure anti-wear agent, 0.1-0.8 parts of rust inhibitor, 0.1-0.6 parts of metal deactivator, 0.002-0.01 parts of demulsifier, and 0.002-0.02 parts of defoamer. The present invention also discloses a preparation method of the chain oil. The fully synthetic high-temperature chain oil provided by the present invention has the necessary properties of high-quality chain oil such as excellent high and low temperature performance, extreme pressure anti-wear protection performance, anti-rust and anti-corrosion performance and anti-emulsification performance, and also has a certain wear self-repairing function and a cost-effectiveness far exceeding similar products.