A new type of aviation base oil

A base oil and aviation technology, applied in the field of aviation lubricating oil, can solve problems such as poor low-temperature pumpability and start-up performance, insufficient high-temperature performance and stability, and poor low-temperature performance, so as to improve service performance and stability, Effects of improving stability and safety and increasing productivity

Inactive Publication Date: 2011-11-30
PLA AIR FORCE OIL MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of insufficient high-temperature performance and stability of aviation base oils in the prior art, poor low-temperature performance, small low-temperature viscosity, poor low-temperature pumpability and start-u...

Method used

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  • A new type of aviation base oil
  • A new type of aviation base oil
  • A new type of aviation base oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] ①Raw material specification

[0038] N-valeric acid content ≥ 99.0% Color ≤ 30 black Zeng Iodine value 2 / 100g,

[0039] N-hexanoic acid content ≥ 99.0%, color ≤ 30 black Zeng, iodine value 2 / 100g,

[0040] N-heptanoic acid content ≥ 99.0% Color ≤ 30 black Zeng Iodine value 2 / 100g,

[0041] Nonanoic acid content ≥ 99.0% color ≤ 30 black Zeng iodine value 2 / 100g,

[0042] Pentaerythritol content ≥ 98.0%,

[0043] Trimethylol dioxane content ≥ 99.0%,

[0044] Activated carbon decolorization power ≥ 12;

[0045] ② Formula

[0046] Phase I Raw Materials

[0047] 143 kg of n-valeric acid, 36 kg of isovaleric acid, 81 kg of n-hexanoic acid, 409 kg of n-heptanoic acid, 51 kg of isooctanoic acid, 167 kg of n-nonanoic acid, 91 kg of pentaerythritol, 191 kg of trimethylolpropane, 12 kg of activated carbon ;

[0048] Phase II Raw Materials

[0049] 114 kg of n-valeric acid, 28 kg of isovaleric acid, 65 kg of n-hexanoic acid, 328 kg of n-heptanoic acid, 40 kg of isoocta...

Embodiment 2

[0054] Raw material is as described in the table below, and all the other are with embodiment 1.

[0055] raw material

Phase 1 (kg)

Phase II (kg)

n-valeric acid

143

114

Isovaleric acid

36

28

N-caproic acid

81

65

n-heptanoic acid

409

328

isooctanoic acid

51

40

Nonanoic acid

167

133

pentaerythritol

91

Trimethylolpropane

191

activated carbon

12

[0056] The deacidification reaction in this example is carried out with reference to the method and equipment provided in "Research on Deacidification of High-acid Crude Oil by Heat Treatment" published by Shen Haiping and others in "Petroleum Refining and Chemical Industry" Volume 35 No. 2 in February 2004 operation.

[0057] The resulting product properties:

[0058]

[0059] Odd-numbered fatty acids in ester oils have lower pour point and pour point. ...

Embodiment 3-17

[0061] The preparation method is the same as in Example 1, and the detailed raw material ratio is shown in the table below, and the numbers of Examples 3-17 are ABCD...I-3.

[0062]

[0063]

[0064]

[0065]

[0066] The performance of the product of the present invention will be further described below by taking the detection data of Example 1 of the present invention as an example.

[0067] Table I: Consistency check of Embodiment 1 of the present invention.

[0068]

[0069] Table II physical and chemical and performance requirements.

[0070]

[0071] Note:

[0072] 1 was titrated to an endpoint of pH 11.

[0073] 2 Not more than 6% compared with the result measured in 35 minutes.

[0074] 3 The test time is 6.5 hours, and the bath temperature is 205±1°C. Using ASTM E1-67 No. 80-F thermometer, the air temperature is maintained at 205 ± 1 °C and preheated if necessary.

[0075] 4mg / in 2 Multiply by 1.55 to convert to g / m 2 .

[0076] 5 In order to...

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Abstract

The invention relates to the field of aviation lubricating oil, and provides an aviation base oil to solve the problems that high temperature stability and low temperature pumpability cannot be simultaneously considered in the conventional base oil and the like. The aviation base oil is prepared from n-valeric acid, hexanoic acid, heptanoic acid, nonanoic acid, pentaerythritol and trimethylolpropane. A preparation method comprises the following steps of: raising the temperature to 140 to 170 DEG C under the protection of inert gas, reacting for 5 to 8 hours under the condition that the temperature is kept between 140 and 170 DEG C, reducing the temperature, adding the n-valeric acid, the hexanoic acid, the heptanoic acid and the nonanoic acid, heating under the protection of the inert gas, raising the temperature, reacting for 10 to 16 hours at the temperature of between 150 and 220 DEG C, deacidifying, reducing the temperature to be less than 180 DEG C, and filtering to obtain a product. The product has good high temperature performance and high stability; meanwhile, the product also has excellent low temperature performance as well as high low temperature pumpability and good startup performance, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of aviation lubricating oil, in particular to a novel aviation base oil. Background technique [0002] Since the end of World War II, with the development of material science and aviation technology, military fighter jets have gone through the development process of the first, second and third generations in turn, and entered the development of the fourth generation in the 1980s. In 1981, the U.S. Air Force's "Advanced Tactical Fighter" development plan was put forward, marking the beginning of the development of the fourth-generation fighter. One of the notable features of the fourth-generation fighter is its supersonic cruise capability and high maneuverability. These would not have been possible without high-performance engines. For military aircraft engines with low bypass ratio, high thrust and low fuel consumption can only be achieved by improving thermal efficiency, that is, by using a higher temperature befo...

Claims

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Application Information

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IPC IPC(8): C10M105/38
Inventor 徐敏顾鹏翔刘爱全张亮
Owner PLA AIR FORCE OIL MATERIAL RES INST
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