A kind of No. 100 unleaded aviation gasoline and preparation method thereof

Abstract

The invention relates to 100# lead-free aviation gasoline and a preparation method thereof. The 100# lead-free aviation gasoline comprises, by volume, 10-18% of industrial isopentane, 1-11% of light alkylated oil, 45-55% of industrial isooctane, 15-22% of toluene, 0-4% of m-xylene, 5-11% of cumene, 1.5-5.5% of aniline, 0.5-3.5% of N-methyl aniline and 0-3% of m-toluidine. The components are blended to form the finished product. Compared with the prior art, the 100# lead-free aviation gasoline does not contain lead and solves the problem of lead pollution of aviation gasoline. Through the optimized combination of the components, the 100# lead-free aviation gasoline quality is high and the 100# lead-free aviation gasoline satisfies the quality index requirements. The 100# lead-free aviation gasoline has a high economic value. The 100# lead-free aviation gasoline blending process is simple and is conducive to industrial production.

Description

technical field [0001] The invention relates to aviation gasoline, in particular to No. 100 unleaded aviation gasoline and a preparation method thereof. Background technique [0002] Aviation gasoline, also known as aviation steam, is the fuel for reciprocating piston engines. It is mainly equipped with primary trainer aircraft and unmanned reconnaissance aircraft in the military field, and agricultural, meteorological, surveying and mapping, exploration and other related operational aircraft in the general aviation field. In recent years, the business volume of aviation gasoline in my country has increased significantly, among which, aviation gasoline with high octane number 95 and 100 accounts for more than 85%. At present, most of these two types of aviation vehicles are produced by adding the antiknock agent tetraethyl lead to increase the octane number and ensure the quality is up to standard. As a traditional antiknock agent in the field of gasoline, tetraethyl lead is...

AI Technical Summary

Problems solved by technology

Ethers, alcohols, and esters all have a high research octane number (RON), but the motor octane number (MON) is only around 100, which has a relatively small impact on gasoline MON, and due to the The calorific value of oxygen compounds is not high, basically around 30MJ / kg, which is far from the 41.5kJ / kg required in the standard. Adding it to aviation steam will make the calorific value of gasoline low, and it is difficult to use it as an anti-corrosion agent for No. 100 aviation steam. and metal-organic compounds, because they will form oxide particles containing manganese and iron after burning in the engine, which will pose a certain degree of harm to the long-term safe operation of the engine. The action of the extraction agent forms highly volatile lead halides, and the discharge is different. There is no good extraction method for the deposition of manganese and iron oxides in the cylinder. Long-term use of this kind of gasoline will reduce the life of the engine and even cause deposits to block the engine oil circuit. Aircraft parking and other major safety issues

In addition to the problem of anti-knock performance, the existing No. 100 aviation gasoline also has other problems such as poor oil stability and low quality due to the use of catalytic cracking gasoline

[0006] Chinese patent CN 103965974B discloses a kind of unleaded aviation gasoline and its preparation method. The aviation gasoline is composed of 15% alkanes, 75% aromatics, 5% aniline and 5% methyl tert-butyl ether. , the selection of the blending formula in this patent is mainly based on the ASTM D7719 quality standard of American aviation gasoline test oil. There is no upper limit requirement for the content of aromatics in the index, and there will still be differences from the preparation of finished aviation gasoline that is directly applied to piston engines. In the gasoline of this invention The aromatics content reaches 75%. Excessive aromatics content will significantly affect the combustion performance of oil products, make gasoline burn incompletely, and form excessive carbon deposits

In addition, the formula uses methyl tert-butyl ether with a calorific value of only 33.7MJ / kg, which will lead to a significant reduction in the calorific value of the fuel after addition

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