12 results about "Avgas" patented technology

The invention relates to the field of neodymium-iron-boron magnet production processes, in particular to a neodymium-iron-boron magnet preparation method which comprises the following steps: S1, after neodymium-iron-boron leftover materials are classified, cleaned and coarsely crushed, hydrogen decrepitation is carried out, and recycled coarsely crushed powder B is obtained; s2, proportioning and smelting an alloy according to specified requirements, and carrying out hydrogen decrepitation to obtain new material coarsely crushed powder A; s3, after the powder A and the powder B are subjected to airflow milling, a lubricant, an antioxidant and aviation gasoline are added into the powder A and the powder B respectively, stirring and mixing are conducted, and fine powder A and fine powder B are obtained respectively; s4, the fine powder A and the fine powder B obtained in the S3 are mixed and sieved, and mixed powder C is obtained; and S5, the mixed powder C is subjected to magnetic field orientation forming, cooling static pressure, oil stripping and sintering, and finally the neodymium iron boron magnetic material is obtained. According to the method, efficient, economical and environment-friendly recycling of the neodymium-iron-boron magnetic material leftover materials is effectively achieved, and the neodymium-iron-boron magnetic material leftover materials are made into new magnetic materials with the performance reaching the standard again.

The invention provides an aviation gasoline composition, aviation gasoline and a preparation method thereof, and relates to the field of aviation fuel oil. The aviation gasoline composition provided by the invention comprises petroleum-based alkylated gasoline, a component A, a component B and a component C. The component A comprises C4-C7 alkane, the component B comprises C8 isoparaffin, and the component C comprises C7-C9 aromatic hydrocarbon. The aviation gasoline composition provided by the invention can be used for obtaining 95 # lead-free aviation gasoline under the condition of not containing any substances such as metal, oxide, nitride, sulfide and the like, and the fraction is more continuous, safer and more environment-friendly in the combustion process.

The present application relates to the technical field of aviation gasoline, and discloses unleaded aviation gasoline and a preparation method thereof.The unleaded aviation gasoline comprises: 75-85 wt% of polymethylbenzene, and 15-25 wt% of at least two of alkylate, a side line distillation component of an alkylate device, light naphtha and isopentane; wherein the motor octane number of the polymethylbenzene is not less than 108.The product quality index of the unleaded aviation gasoline meets the standard of the American Society for Testing and Materials, that is, the technical requirement of ASTM D7719-2018 high-aromatic unleaded aviation gasoline.The unleaded aviation gasoline has the characteristics of good component continuity, stable combustion and high motor octane number, and meets the high-standard use requirement of unleaded and high-octane aviation gasoline.

The invention discloses a grinding fluid for a high-volume-fraction SiCp / Al material, the grinding fluid comprises a grinding material, an additive and a solvent, the grinding material is carborundum, the additive comprises modified polycarboxylate, stearic acid particles and glycerol, and the solvent comprises animal oil and aviation gasoline; the volume ratio of the components is as follows: 10% of the grinding material, 10% of the animal oil, 3% of the modified polycarboxylate, 7% of the stearic acid particles, 10% of the glycerol and 60% of the aviation gasoline. After machining of a machine tool, the grinding fluid provided by the invention is adopted for precise grinding, and the precision requirements of flatness, parallelism, perpendicularity and the like of parts can be improved.

The invention relates to the field of fuel oil, and discloses a method for preparing lead-free gasoline, which comprises the following steps: distilling alkylated gasoline, taking a distillation product with a distillation range of 35-138 DEG C as cutting oil, and mixing 55-83 wt% of cutting oil, 3-14 wt% of isopentane, 3-15 wt% of C6-C10 aromatic hydrocarbon and an additive, the additive contains 10 to 20 weight percent of carbonic ester and 105 to 300 mg Mn / kg of carbonyl manganese. The key indexes of the lead-free gasoline provided by the invention meet the specification requirements of 100VLL in ASTM910 and 100LL high-grade aviation gasoline in GB1787, and meanwhile, the lead-free gasoline does not contain lead compounds, is low in aromatic amine and aromatic hydrocarbon content, and has lower toxic influence on the environment. In addition, the preparation process of the lead-free gasoline is simple, easy to operate and low in cost, and has industrial application prospects and remarkable economic and social benefits.

The invention relates to the field of aviation fuel, and discloses an aviation gasoline composition containing a bio-based component and a preparation method thereof, and the aviation gasoline composition comprises the following components relative to the total weight of the aviation gasoline composition: 8-20wt% of C5 isoparaffin; the total content of the C6-C7 isoparaffin is 5 to 10 weight percent; the total content of C7-C9 aromatic hydrocarbon is 3 to 18 weight percent; the content of C8 isoparaffin is 40 to 65 percent; the content of the 2, 5-dimethylfuran is 10 to 30 weight percent; no more than 2 wt% of C4 alkane; and not more than 2wt% of alkane with the carbon number of C9 and above. The motor octane number of the aviation gasoline composition is not lower than 91, the aviation gasoline composition contains part of bio-based component 2, 5-dimethylfuran, does not contain metal additives, nitrogen-containing compounds and the like, can meet the use requirements of lead-free aviation gasoline, is simple in component type, safer, more environmentally friendly and low-carbon, and has a practical application prospect.

The invention relates to the field of fuel oil, and discloses aviation gasoline and a preparation method thereof. The preparation method of the aviation gasoline comprises the steps that alkylated gasoline is rectified, the alkylated gasoline with the distillation range of 35-125 DEG C is taken as a component A, the component A, a component B and an optional additive are mixed, and the weight ratio of the component A to the component B in the aviation gasoline is 2-9; the component B contains isopentane and cumene, and the weight ratio of the isopentane to the cumene is 0.5-2. The aviation gasoline provided by the invention meets various indexes such as octane number, vapor pressure, distillation range and the like, greatly reduces the use amount of tetraethyl lead, and is environment-friendly.

Unleaded aviation gasoline. An aviation gasoline fuel blend includes an unleaded aviation gasoline base fuel, with an effective amount of selected alkyl benzenes to improve the functional engine performance to avoid harmful detonation sufficient to meet or exceed selected standards for detonation performance requirements in full scale aircraft piston spark ignition engines designed for use with Grade 100LL avgas. Suitable alkylated benzenes may include a mixture of xylene isomers. Aromatic amines, such as m-toluidine, may also be added to increase MON. Base fuels may be a high quality aviation alkylate, or may be a commercial iso-octane, or a mixture of high quality aviation alkylate enhanced by iso-octane, or by commercial iso-octane mixtures, and may include iso-pentane or butane or both iso-pentane and butane in sufficient quantity to provide appropriate vapor pressure for the final fuel blend.

The invention relates to the field of fuel oil, and discloses a method for preparing ether-containing lead-free gasoline, which comprises the following steps: distilling alkylated gasoline, taking a distillation product with a distillation range of 36-140 DEG C as cutting oil, and mixing 60-85 wt% of cutting oil, 5.5-15 wt% of isopentane, 2-18 wt% of C6-C10 aromatic hydrocarbon and an additive, and the additive contains 2 to 20 weight percent of dialkyl ether and 110 to 300 mg Mn / kg of manganese-containing antiknock agent. The key indexes of the lead-free gasoline provided by the invention meet the specification requirements of 100VLL in ASTM910 and 100LL high-grade aviation gasoline in GB1787, and meanwhile, the lead-free gasoline does not contain lead compounds and aromatic amine compounds and is low in aromatic hydrocarbon content. In addition, the preparation process of the lead-free gasoline is simple, easy to operate and low in cost, and has industrial application prospects and remarkable economic and social benefits.

The invention relates to the field of fuel oil, and discloses a method for preparing lead-free gasoline, which comprises the following steps: distilling alkylated gasoline, taking a distillation product with a distillation range of 38-135 DEG C as cutting oil, and mixing 40-90 wt% of cutting oil, 2-15 wt% of C4-C5 alkane, 0-50 wt% of C8 alkane, 2-10 wt% of C6-C10 aromatic hydrocarbon and an additive, and the additive contains 0.5 to 5% by weight of aniline and 60 to 300 mg Mn / kg of a manganese antiknock agent. The lead-free gasoline disclosed by the invention has the advantages of high octane number, proper heat value, relatively low freezing point, relatively good oxidation stability and water reaction and the like, meanwhile, the addition amount of aniline and manganese antiknock agents is greatly reduced, and the preparation process is simple. Particularly, according to a preferred embodiment of the invention, the lead-free gasoline meets the GB1787-2018 standard of aviation gasoline with the number of 100LL.

The invention relates to the field of fuel oil, and discloses a lead-free aviation gasoline composition and a preparation method of the lead-free aviation gasoline composition. The lead-free aviation gasoline composition comprises the following components in percentage by weight: 7.1 to 15 percent of C5 isoparaffin, 45 to 75 percent of C8 alkane, 0 to 2 percent of C4 alkane, 3 to 15 percent of C6-C7 alkane, 0 to 2.5 percent of C9 and C9 alkane, 1 to 10 percent of C7-C9 aromatic hydrocarbon and 1 to 23 percent of branched alkyl acetate with the carbon atom number of C4-C8. The lead-free aviation gasoline composition meets the requirements of various indexes such as antiknock property, vapor pressure, distillation range, calorific value, freezing point and the like, and does not contain high-toxic substances such as metal additives, aromatic amine compounds and the like. In addition, the lead-free aviation gasoline composition is simple in process and environment-friendly.

The present application relates to the technical field of gasoline rectification, and discloses an aviation gasoline rectification system capable of reducing solid waste emission, which comprises a heating cylinder, a rectification assembly is arranged on the heating cylinder, and the rectification assembly comprises a bottom heating device. In order to adapt the device to large-scale aviation gasoline production demand, the rectification assembly is arranged, the assembly is matched with the bottom heating device, the raw material is uniformly heated through a spiral heating pipe, the raw material is rapidly vaporized, and is transported to the parallel rectification tower through a connecting pipe. The spiral heat conduction pipe of the rectification heating device provides segmented heating, the arc filter plate is matched to preliminarily filter heavy component impurities, the spiral spoiler prolongs the vapor phase residence time, strengthens the gas-liquid mass transfer effect, the inclined guide plate guides the directional flow of the vapor phase, the condensing device rapidly condenses qualified vapor phase, the collection cylinder collects high-purity aviation gasoline, and the liquid discharge pipe and the discharge pipe centrally discharge a small amount of heavy component solid waste.