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Synthetic method of polyhydroxy alcohol fatty acid ester by scratch film evaporator

A technology of wiped film evaporator and synthesis method, which is applied in chemical instruments and methods, preparation of carboxylic acid esters, preparation of organic compounds, etc. It can solve the problems of water not easy to escape, poor heat transfer effect, etc., and achieve continuous and uninterrupted production , high-efficiency production, and stable film flow rate

Active Publication Date: 2016-07-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for synthesizing polyol fatty acid esters using a wiped-film evaporator, to overcome the defects that the prior art adopts tank reactors with poor heat transfer effect and the water generated during the reaction process is not easy to escape from the system.

Method used

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  • Synthetic method of polyhydroxy alcohol fatty acid ester by scratch film evaporator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Mix trimethylolpropane and n-hexanoic acid according to the molar ratio of hydroxyl and carboxyl groups of 1:1, heat and stir to make them dissolve in each other. Firstly, the heat transfer oil circulation is started, and the heat transfer oil is input from the heat transfer oil inlet and output from the heat transfer oil outlet, so that the wiped film evaporator reaches 180°C. Secondly, turn on the vacuuming equipment, and perform vacuuming operation on the equipment system through the vacuum pumping port, so that the internal pressure of the wiped film evaporator reaches 60KPa. Then turn on the external condenser and let it reach 10°C. After the above three items are stabilized at the set parameters, turn on the feeding pump, so that the reactant mixture flows into the wiper film evaporator through the material mixture inlet, and at the same time turn on the motor. Driven by the motor, the wiper device rotates and flows into the scraper The material mixture in the fi...

Embodiment 2

[0050] Mix pentaerythritol and n-heptanoic acid according to the molar ratio of hydroxyl and carboxyl groups of 1:1.06, heat and stir to make them dissolve. First turn on the heat conduction oil circulation to make the wiped film evaporator reach 180°C. Next, turn on the vacuuming equipment, and perform vacuuming operation on the equipment system through the vacuum pumping port, so that the internal pressure of the wiped film evaporator reaches the set 55KPa, and then turn on the external condenser to make it reach 20°C. After the above three items are stable and the parameters are set, turn on the feeding pump, so that the reactant mixture flows into the wiper film evaporator through the material mixture inlet, and at the same time turn on the motor, driven by the motor, the wiper rotates and makes the flow into the scraper The material mixture in the film evaporator forms a uniform liquid film on the inner wall. The liquid film is rapidly heated to undergo an esterification...

Embodiment 3

[0052] Mix trimethylolpropane and n-octanoic acid according to the molar ratio of hydroxyl and carboxyl groups of 1:1.15, heat and stir to make them dissolve. First turn on the heat transfer oil circulation to make the wiped film evaporator reach 190°C. Secondly, turn on the vacuuming equipment, and perform vacuuming operation on the equipment system through the vacuum pumping port, so that the internal pressure of the wiped film evaporator reaches 50KPa. Then turn on the external condenser and let it reach 5°C. After the above three items are stabilized at the set parameters, turn on the feeding pump, so that the reactant mixture flows into the wiper film evaporator through the material mixture inlet, and at the same time turn on the motor. Driven by the motor, the wiper device rotates and flows into the scraper The material mixture in the film evaporator forms a uniform liquid film on the inner wall. The liquid film is rapidly heated to undergo an esterification reaction, ...

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Abstract

The invention discloses a synthetic method of polyhydroxy alcohol fatty acid ester by a scratch film evaporator as a reactor. The synthetic method comprises the following steps: adopting a scratch film evaporator as a reactor to react polybasic alcohol with fatty acid; mixing the polybasic alcohol and the fatty acid according to a mole ratio that hydroxyl to carboxyl is 1 to (1-1.6), and heating and stirring the mixture, so that the polybasic alcohol and the fatty acid dissolve mutually; inputting the mixed liquid into the scratch film evaporator by a feed pump, so that the mixed liquid is heated by flowing through inner walls of the scratch film evaporator from top to bottom in the form of a liquid film under actions of the scratch film evaporator, and an esterification reaction thereby occurs; pumping water generated in the reaction in a gaseous form out of the scratch film evaporator under vacuum conditions, and collecting the pumped water in the gaseous form by an external condense; and outputting reaction products from a bottom of the scratch film evaporator by a gear pump. By carrying out the esterification reaction adopting the method, the reaction materials are rapidly and uniformly heated, and the water generated by the reaction escapes rapidly, so that the esterification reaction is shifted toward the right side in a balanced way; moreover, the esterification reaction is very high in esterification efficiency. In addition, continuous production can be realized by the synthetic method.

Description

technical field [0001] The invention relates to a method for synthesizing ester compounds in organic chemistry, in particular to a method for synthesizing polyol fatty acid esters using a wiped film evaporator as a reactor. Background technique [0002] Fatty acid polyol esters have excellent thermal stability, oxidation resistance, good low-temperature viscosity and high viscosity index, and are widely used in the lubrication of various machinery, especially as aviation lubricants, hydraulic fluids, compressor oils, etc. , by adjusting the carbon chain length and structure of fatty acids, products that can be used under different working conditions can be obtained. Because of its natural biodegradability, fatty acid polyol ester is also a green lubricant. In addition, fatty acid polyol ester can also be used as a plasticizer with excellent insulation and temperature resistance, and is widely used in the production of high temperature resistant lubricants. Cable materials a...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/30C07C69/33C07C69/58C07C69/587
Inventor 孔令杰张东恒李洪伟
Owner PETROCHINA CO LTD
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