55results about How to "Excellent high temperature detergency" patented technology

The invention discloses a synthesis method of a calcium-magnesium salicylate composite detergent in the field of lubricant additives. The method comprises the following steps: adding alkyl salicylic acid and solvent xylene in a reaction container, adding calcium oxide, accelerant, auxiliary promoter and the like in a stirring state, and carrying out a neutralization reaction when a reaction temperature rises to the temperature needed by the neutralization reaction; after the neutralization reaction is ended, adding magnesium oxide, water, ammonia water, auxiliary promoter and the like, charging carbon dioxide and carrying out a carbonation reaction; after the carbonation reaction is ended, carrying out product post-treatment to obtain a lubricant detergent product. The method disclosed by the invention achieves the following beneficial effects: the alkali number of the calcium-magnesium salicylate composite detergent prepared by the method is greater than 400mg KOH / g, the thermal oxidation stability and the high-temperature detergency of lubricant oil are obviously improved, the dispersibility and the wear resistance of the lubricant oil are improved to a certain extent, and the product stability is great.

The invention discloses an anti-wear lubricating oil for automobiles, which is composed of the following raw materials in percentage by weight: 2%-3% of alkyl salicylic acid; 0.2%-2.0% of zinc dialkyl dithiophosphate, and 0.6% of borate %‑5%; polyvinyl n-butyl ether 1.0%‑2.5%; benzotriazole 0.05%‑0.40%; alkylnaphthalene 0.1%‑1.0%; methyl silicone oil 1%‑3%; 1%-3% antimony dithiophosphate; 1%-3% butyl stearate; the balance of base oil. Compared with the prior art, the beneficial effects of the present invention are: excellent high-temperature detergency, anti-oxidation stability, anti-friction and anti-wear properties and base number retention, low average fuel consumption, reduced engine noise, reduced engine vibration, The operation is more stable, and the driving and handling performance has been significantly improved.

The invention relates to a lubricating oil composition and a preparation method thereof, comprising the following components in parts by weight: 75-95 parts of base oil; 5-10 parts of tackifier; 0.1-1 part of pour point depressant; 2-2 parts of cleaning and dispersing agent 7 parts; 0-2 parts of ashless dispersant; 0.5-3 parts of anti-oxidant preservative; the detergent dispersant includes one or both of rosin and glycerin rosin ester. The present invention adopts one or both of rosin and glycerin rosin ester to replace the traditional alkaline earth metal detergent, which has excellent high-temperature detergency, low-temperature dispersibility, and decontamination ability, and the lubricating oil prepared by using the detergent-dispersant has excellent The cleaning and dispersing effect of the engine can avoid the corrosion and corrosive wear caused by the generation of oxides during the use of the engine.

The invention provides a preparation method for vulcanized alkylphenol. The method disclosed by the invention comprises the following steps: (1) mixing alkylphenol and a vulcanizing agent with inorganic alkaline or an aqueous solution of the inorganic alkaline, and conducting vulcanization reaction; (2) adding low-molecular-weight alcohol aqueous solution into a reaction product obtained in the step (1), mixing and stirring, then adding a demulsifier, separating an oil phase, and collecting a product. The vulcanized alkylphenol prepared by using the preparation method disclosed by the invention is excellent in antioxidant activity, corrosion inhibition and high-temperature detergency and is a lubricating oil antioxidant with comprehensive performance.