Diesel lubricity improver（Acid）

The research background of diesel lubricating modifier (antiwear agent)

Since the beginning of the 1990s, with the diesel refining to raise the level of the requirements of sulfide content is more and more low, many countries for a diesel engine high pressure oil pump and injector rapid wear failure accidents, such as Sweden, Canada and parts of the United States, the first large-scale fuel pump failure, there is adhesive wear of the pump, then the pump performance the rapid decline to be degree. These pump failures have sounded the alarm to people, making people gradually aware of the decline in diesel lubricity.

In the diesel oil is mainly polycyclic aromatic hydrocarbons, oxygen impurity, nitrogen containing impurities and sulfur compounds influence the antiwear lubrication, lubrication of diesel depends on the content of anti-wear material, polycyclic aromatic hydrocarbons, nitrogen-containing compounds have good antiwear properties, and sulfide not only wear, but promote wear. But the sulfide in diesel mostly exist in the form of heterocyclic and polycyclic aromatic hydrocarbons, so at the beginning of twentieth Century due to serious environmental pollution and vigorously promote the removal of sulfide sulfide removal of diesel at the same time, also with the lubrication properties of aromatic hydrocarbons and polycyclic aromatic hydrocarbons and other lubrication components. As a result, diesel engines are worn and damaged as sulfur content decreases, and their service life is shortened. Therefore, it is an important issue to improve the wear resistance of low sulfur diesel oil.

The problem of lubricity of low sulfur diesel can be solved from two aspects.

1. analysis the failure cause of engine oil pump and improve engine design.

2. the method of adding antiwear additive is used to solve the problem.

Because the cost of improving the engine equipment is huge and time-consuming, foreign oil companies mainly add antiwear agents to improve the lubricity of diesel and reduce the loss of equipment. Adding antiwear agent to improve the lubricity of diesel is the most economical and effective method at present.

Since China's entry into the WTO, the oil market has opened up further, and the quality of diesel oil must be in line with the international standards. Therefore, since July 1, 2007, the national standard equivalent to the European IV has been implemented. Diesel is developing towards the direction of ultra-low sulfur and low aromatics. Therefore, it is necessary to study the antiwear additive with high value and low toxicity and good application value to prevent the wear of diesel engine from becoming the development trend of domestic low sulfur diesel.

The mechanism of diesel lubricating modifier (antiwear agent):

Antiwear agent of low sulfur diesel are generally polar substances, adding small amounts of antiwear in diesel, the use of force polarity within or between molecules attached to the metal surface, organic adsorption film to generate more firmly, so as to improve the ability to prevent adhesion of low sulfur diesel.

Equipment and indicators for the preparation of low sulfur diesel lubricating modifier (antiwear agent)

1. equipment: ball disc test machine and high frequency reciprocating test machine (HFRR)

2. index: the measured steel ball mill spot diameter (WS1.4) is used as the evaluation index of the wear resistance. At present, the test index of anti-wear performance has been stipulated in the diesel fuel index for urban vehicles, which requires that the wear spot diameter is not more than 460 u m.

3. evaluation method of diesel performance:

The wear resistant additives, in addition to providing boundary wear and abrasion resistance to meet at the same time, also called additive must be efficient, not on the main performance of diesel, such as oxidation stability, detergency, corrosion resistance, water and environmental performance have a negative impact, so obviously, the need of performance the additive diesel evaluation, evaluation method of diesel performance required for such as table

Evaluation method of diesel performance

Research progress of low sulfur diesel lubricating modifier (antiwear agent)

Adding antiwear agent is the basic way to solve the lubrication decline of low sulfur diesel oil. Many related researches have been carried out abroad, and mature diesel antiwear products have been developed. However, our research in this field started late and the research is lagging behind. In view of the development requirements of future diesel oil,

the research and development of high efficiency antiwear agents for low sulfur diesel oil in China are urgently needed. At present, active substances such as alcohols, ethers, esters, carboxylic acids and amides are studied as antiwear agents for low sulfur diesel oil. Both alcohols and ethers are oxygen - containing polar compounds, but more additives are needed as antiwear agents. Do antiwear additives are mainly carboxylic acid fatty acid compounds containing long chain, strong polar carboxyl and long carbon chain, can form a dense adsorption film on metal surface, can effectively reduce friction and wear, but will plug the filter using carboxylic acid fuel.

The performance of diesel lubricity improver (antiwear agent) produced by our company

1. the new type of diesel antiwear agent produced by us is a kind of fatty acid type diesel antiwear agent. This new type of acid diesel antiwear agent and other additives in diesel oil have good compatibility. After adding, it will not form colloid or sedimentation in diesel oil, and will not affect other properties of diesel (such as low temperature fluidity, oxidation stability, sixteen alkane and antistatic property). At the same time, it overcomes the disadvantages of low anti-wear performance and large amount of use of similar products of domestic manufacturers. This product has a good performance price ratio. After adding, it has no adverse effects on the quality of diesel products, and its performance reaches the advanced level of foreign countries. The added amount is within the range of 80-300ppm, and it can achieve significant results.

2. the basic properties of the diesel lubricating modifier of the company are as follows

Fatty acid antiwear agent

Fatty acid ester antiwear agent

Methods of use

1. Standard for anti-wear additives of fatty acid and fatty acid ester diesel:

2. this agent is directly added into the diesel oil and can be mixed evenly through a cycle. It can also be diluted with diesel and then in diesel.

Packaging and storage

1. plastic barrels / galvanized steel (net 180kg/ barrel or tanker transport).

2. should be stored in a cool and ventilated environment to prevent exposure from exposure and away from the source of fire. The storage period is two years under room temperature and sealed storage conditions.