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A kind of pentaerythritol ester base oil and its synthetic method

A pentaerythritol ester and synthesis method technology, applied in the field of lubricating oil base oil, can solve the problems of accelerating the research of ester synthetic oil, high pour point of mineral oil, and failure to start the aircraft, so as to reduce raw material cost and process difficulty, and high viscosity index , the effect of broad industrialization prospects

Active Publication Date: 2018-03-27
GUANGHAN TIANZHOU AERO ENGINE FUEL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During World War II, due to the high pour point of mineral oil and poor low-temperature fluidity, German aircraft could not be started, thus accelerating the research on ester synthetic oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Synthesis of dimer-enriched pentaerythritol 1

[0041]Add 500g of monopentaerythritol and 5g of 85% phosphoric acid into a 5L reaction kettle, and replace the air in the kettle with nitrogen, repeating 4 times. Program temperature rise, when the temperature rises to 160°C, vacuumize to -0.05MPa, keep the temperature between 200-240°C, and react for 2 hours. Sampling was carried out, and the ratio of dipentaerythritol to monopentaerythritol in the product was monitored to be 5 / 95 by high-performance liquid chromatography with a differential detector.

[0042] Synthesis of Dimer-rich Pentaerythritol Fatty Acid Ester 1

[0043] After the temperature of the above reaction solution dropped to 100°C, add 406g of n-valeric acid, 994g of n-heptanoic acid, and 676g of n-nonanoic acid into the reactor, close the reactor, pass nitrogen to a pressure of 0.5MPa, and then vacuumize. Repeat this operation 4 times. Then the temperature was raised to 160° C., and the temperature was ...

Embodiment 2

[0046] Synthesis of dimer-enriched pentaerythritol 2

[0047] Add 450g of monopentaerythritol and 4.5g of p-toluenesulfonic acid into a 5L reaction kettle, and replace the air in the kettle with nitrogen, repeating 4 times. Program temperature rise, when the temperature rises to 160°C, vacuumize to -0.05MPa, keep the temperature between 200-240°C, and react for 2.5 hours. Sampling was carried out, and the ratio of dipentaerythritol to monopentaerythritol in the product was monitored to be 13 / 87 by high-performance liquid chromatography with a differential detector.

[0048] Synthesis of Dimer-rich Pentaerythritol Fatty Acid Ester 2

[0049] When the temperature of the above reaction solution drops to 100°C, add 455g of n-valeric acid, 169g of n-hexanoic acid, 189g of n-heptanoic acid, 629g of n-octanoic acid, 460g of n-nonanoic acid, and 4g of tributyl phosphite into the reactor, and close the reactor , nitrogen to a pressure of 0.5MPa, and then vacuum. Repeat this operatio...

Embodiment 3

[0052] Synthesis of dimer-enriched pentaerythritol 3

[0053] 475g of monopentaerythritol and 7.13g of potassium carbonate were added into a 5L reactor, and the air in the reactor was replaced by nitrogen, and repeated 4 times. Program temperature rise, when the temperature rises to 200°C, vacuumize to -0.07MPa, keep the temperature between 240-250°C, and react for 5 hours. Sampling was carried out, and the ratio of dipentaerythritol to monopentaerythritol in the product was monitored to be 22 / 78 by high-performance liquid chromatography with a differential detector.

[0054] Synthesis of Dimer-rich Pentaerythritol Fatty Acid Ester 3

[0055] When the temperature of the above reaction solution drops to 100°C, add 1230g of n-hexanoic acid, 218g of n-octanoic acid, and 521g of n-decanoic acid into the reactor, close the reactor, pass nitrogen to a pressure of 0.2MPa, and then vacuumize. Repeat this operation 4 times. Then the temperature was raised to 220° C., and the tempera...

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Abstract

The invention provides pentaerythritol ester base oil and a synthesis method thereof. The concrete synthesis method comprises the following steps of adding a catalyst A into pentaerythritol serving as a reaction raw material to carry out self-polymerization reaction to generate pentaerythritol rich in a dipolymer; adding fatty acid or arylcarboxylic acid into pentaerythritol rich in the dipolymer to carry out esterification reaction to obtain a crude product; and deacidifying and decolorizing the crude product to obtain the pentaerythritol ester base oil. The dipolymer of pentaerythritol ester and corresponding esters are introduced to a mixture, so that the viscosity and viscosity-temperature characteristics of the base oil are improved, and the condensation point of the base oil is reduced; and the obtained base oil is particularly suitable for the fields of aircraft engine lubricating oil, gear oil and the like.

Description

technical field [0001] The invention relates to the field of lubricating base oils, in particular to a pentaerythritol ester base oil and a synthesis method thereof. Background technique [0002] As an indispensable material for machine operation, lubricating oil plays a vital role in maintaining the normal operation of the machine, improving the efficiency of the machine, and prolonging the service life of the machine. With the development of contemporary industry, the operating environment of the machine is more severe, which puts forward higher requirements for the service life of the machine. The previous mineral base oil is non-renewable, pollutes the environment, and gradually withdraws from use. However, animal and vegetable oils have disadvantages such as poor thermal stability, poor oxidation stability, and poor hydrolytic stability as lubricating base oils. Therefore, people turned their attention to synthetic lubricants. Chemically synthesized lubricating oil, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M105/38C10N20/02
Inventor 温明安伟曾兆勇
Owner GUANGHAN TIANZHOU AERO ENGINE FUEL TECH CO LTD
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