Macromolecular ester type diesel fuel antiwear agent (polyglycerol polyglycerol poly (oleic acid ester))

project

Development Mechanism: in recent years, with the constant fuel regulation and the introduction of new environmental protection laws and regulations, the environmental protection requirements are getting higher and higher. On the same vehicle fuel and diesel quality also put forward higher requirements, so the diesel product index of nitrogen and sulfur content to put forward new requirements and sixteen of cetane number, cold flow properties, aromatics content, 90% or 95% distillation temperature (T90 or T95) and density are also put forward more strict requirements. Sulfur and aromatics can be removed by hydrofining diesel oil, but the natural components with antiwear function in diesel oil are also removed. At last, the lubricity of diesel is greatly reduced and the friction between metals is increased. According to statistics, about 1/3 of the energy consumption is on the friction, more than 2/3 of the parts damaged by wear and tear scrapped. Therefore, improving the lubrication performance to reduce friction and wear and prevent sintering is of great significance to the national economy.

The mechanism of diesel antiwear agent is that the low abrasion resistance of diesel fuel is due to the high temperature of the low viscosity light fuel in the process of friction with metal, the wear, abrasion and corrosion of the lubricating film. From the lubricating properties of diesel oil, PAHs, nitrides and oxides play a major role in the lubrication of diesel fuel. In fact, the sulfur compounds in the diesel to promote wear, it is often with anti-wear components containing nitrogen and oxygen containing compounds and polycyclic aromatic hydrocarbons with the refined diesel will, through hydrogenation desulfurization will fall, but will also have more anti-wear components with material removal, resulting in greatly reduced the lubricity of diesel fuels. At present, many scholars at home and abroad are studying that adding a small amount of anti-wear material can make the hydrogenation of diesel oil still has anti-wear effect. Anti-wear agent is mainly to prevent scratching, sticking, wear and so on. It is soluble in diesel oil, mainly rely on physical and chemical adsorption energy to form a strong directional adsorption film on the friction surface to lubricate. For effective adsorption lubrication, not only the molecular polarity, but also the molecular configuration is conducive to the formation of high resistance protective film, therefore, only with polar groups (including oxygen, nitrogen groups, etc.) long chain linear molecules can meet the requirements. The antiwear properties of hydrogenated diesel oil were improved by the following methods. One is to change the blending scheme of diesel by adding a small amount of good lubricating diesel composition. Two is the method of adding antiwear additives or blending components into diesel oil. Three is to change the preparation process operation.

Diesel antiwear agent: Diesel antiwear agent is an additive to improve the lubricity of diesel fuel. The ideal antiwear additive is a long chain linear molecule with polar oxygen and nitrogen. At present, the additives that can improve the lubricity of diesel oil are mainly long chain carboxylic acids, esters, amides, ethers, alcohols and other compounds. It is characterized by hydroxyl, amine group, organic carboxyl polar group oil-based agent. Esters are a kind of clean diesel components which have great potential for development at home and abroad. Esters are catalysed by dehydration of organic acids and alcohols. It has the advantages of strong hydrolysis resistance, good detergency and dispersion, and high extreme pressure performance. Ester products contain many kinds of oxygen atoms, such as carbonyl oxygen and alcohol based oxygen, which can form thick oil film between the friction pairs, which is crucial to the lubrication effect, and effectively protects the metal surface from oxidation and corrosion. Non-toxic and harmless, it is environmentally friendly hydrogenation diesel anti-wear agent.

Product advantage: polyglycerol polyricinoleate ester is one of the most advanced diesel additive is the most environmentally friendly, high molecular weight (1200-1400), good oil solubility, easy dispersion, easy emulsification, with strong water resistance, good detergency, high extreme pressure performance, lubrication and friction spot lubricating film the effect has caught up with similar products in the United states. The addition amount of the product is 1/3 of the low freezing point fatty acid, the addition amount is 80-300mg/kg, and the diameter of the friction spot is less than 300-420 M.
Lubricating spot diameter of crude oil:
Wsi.4/um 460-520 521-600 601-700 to 700
Wear spot diameter of additive diesel fuel:
Wsi.4/um is not greater than
300-420 300-420 300-420 300-420
Dose / (mg/gk) is not greater than
80 150 200 300