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End capping method of perfluoropolyether

A perfluoropolyether, end group technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry and other directions, can solve the problems of high energy consumption, unsuitable for industrial production, low reaction efficiency, etc., to simplify the operation process, The effect of saving the cost of raw materials and improving the conversion rate

Active Publication Date: 2021-07-23
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the embodiment of the present application provides a capping method for perfluoropolyether, which solves the problems of low reaction efficiency, high energy consumption, and unsuitability for industrial production of the existing capping method, and improves the performance of saturated perfluoropolyether. High yield and production efficiency, reduced energy consumption, suitable for industrial production

Method used

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  • End capping method of perfluoropolyether
  • End capping method of perfluoropolyether
  • End capping method of perfluoropolyether

Examples

Experimental program
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Effect test

Embodiment 1

[0069] According to this embodiment figure 1 The process flow shown is carried out.

[0070] The perfluoropolyether (molecular general formula: CF 3 O(CF(CF 3 ) CF 2 O) m CF 2 COF, m=8-13, average molecular weight is 2174) into the raw material tank, and triethylamine into the auxiliary agent tank. Add 6522g of perfluoropolyether acid fluoride and triethylamine into the mixing tank at a molar ratio of 1:1 for mixing, and then pump them into a 15L plug-flow reactor.

[0071] The 300°C superheated steam enters the reactor from the bottom coil pipe, and the molar ratio of steam to perfluoropolyetheryl fluoride is 6:1. The temperature in the reactor is controlled by controlling the flow of water vapor. The temperature in the reactor is 192±3°C, the maximum pressure is 2.8MPa, and the residence time of the material in the reactor is 20h. After the reaction finished, the reaction crude product was discharged from the outlet of the reactor as 6274g colorless transparent liquid...

Embodiment 2

[0074] According to this embodiment figure 1 The process flow shown is carried out.

[0075] The perfluoropolyether (molecular general formula: CF 3 O(CF 2 CF 2 O) m (CF 2 O) n COF, m=6-20, n=8-15, average molecular weight of 1955) is added to the raw material tank, and ethylenediamine is added to the auxiliary agent tank. Add 5000g of perfluoropolyether acid fluoride and ethylenediamine into the mixing tank at a molar ratio of 1:1.2 for mixing, and then pump them into a 15L plug-flow reactor.

[0076] The 280°C superheated steam enters the reactor from the bottom coil pipe, and the molar ratio of steam to perfluoropolyetheryl fluoride is 6:1. The temperature inside the reactor is controlled to be 180±3°C, the maximum pressure is 2.5MPa, and the residence time of the material in the reactor is 17h. After the reaction finished, the reaction crude product was discharged from the outlet of the reactor as 4733g colorless transparent liquid.

[0077] Infrared analysis was ...

Embodiment 3

[0079] According to this embodiment figure 1 The process flow shown is carried out.

[0080] The perfluoropolyether (molecular general formula is: (CF) containing acyl fluoride group 3 O(CF(CF 3 ) CF 2 O) m (CF 2 O) p (CF(CF 3 )O) n CF 2 COF, m=5-8, p=5-10, n=5-10, average molecular weight is 2060) is added to the raw material tank, and triethylamine is added to the auxiliary agent tank. Add 6180g of perfluoropolyether acid fluoride and triethylamine into the mixing tank at a molar ratio of 1:1.2 for mixing, and then pump them into a 15L plug-flow reactor.

[0081] The superheated mixed steam of 300°C water and methanol enters the reactor from the bottom coil, the amount of methanol added to the superheated mixed steam is 20wt%, and the molar ratio of steam to perfluoropolyetheryl fluoride is 6:1. The temperature inside the reactor is controlled to be 198±2°C, the maximum pressure is 5MPa, and the residence time of the material in the reactor is 20h. After the react...

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Abstract

The invention discloses an end capping method of perfluoropolyether, and relates to the technical field of fluorine chemical industry. The end capping method comprises the following steps: carrying out end capping reaction on a perfluoropolyether raw material with an unsaturated group as an end group in the presence of an auxiliary agent and reaction medium steam to obtain saturated perfluoropolyether, the auxiliary agent is an organic amine compound or a mixture of the organic amine compound and inorganic base. The method solves the problems that an existing blocking method is low in reaction efficiency, high in energy consumption and not suitable for industrial production, the yield and production efficiency of saturated perfluoropolyether are improved, energy consumption is reduced, and the method is suitable for industrial production.

Description

technical field [0001] This application relates to the technical field of fluorine chemical industry, in particular to a method for capping perfluoropolyether. Background technique [0002] The data center immersion liquid cooling is to immerse the server in the liquid to circulate and cool, and use insulating cooling liquid instead of air cooling. In this way, there is no need to use any cooling equipment such as fans or air conditioners, which also saves a lot of space. Therefore, the use of immersion liquid cooling will be the main direction of future data center development. Perfluoropolyether is a high-molecular polymer, which is an oily liquid at room temperature. It has the characteristics of high thermal stability, excellent chemical inertness, wide liquid temperature range, low volatility, good viscosity-temperature characteristics, remarkable lubricity and non-combustibility. It can be used for immersion liquid coolant. In recent years, lower molecular weight per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/32C08G65/48C07C41/18C07C43/12
CPCC08G65/32C08G65/48C07C41/18C07C43/123C07C43/126Y02P20/10
Inventor 徐晓波李宏峰周黎旸杨海波谢煜周凯静
Owner JUHUA GROUP TECH CENT
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