Method and device for preparing hexafluoropropylene oxide oligomer

A technology of hexafluoropropylene oxide and oligomers, which is applied in the field of preparation of hexafluoropropylene oxide oligomers, and can solve the problems of low product yield and inability to recycle

Inactive Publication Date: 2018-11-06
ZHEJIANG XINGTENG CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, using the stirred reactor described in the patent, the stirred pot cascade evaporator, the liquid annular pump, the pipeline reactor, etc., which can be combined with the separator, belong to the semi-continuous reaction device; or use the bubble in the convection reactor Cover plate reactors or sieve plate reactors or packed towers or spray tower reactors or ring reactors or nozzle reactors combined with separators still have the problem of not being able to recycle mass-produced pentafluoropropionyl fluoride , this point can be reflected from the examples of this patent, 15% of pentafluoropropionyl fluoride is produced, so the yield of products above dimer is not high

Method used

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  • Method and device for preparing hexafluoropropylene oxide oligomer
  • Method and device for preparing hexafluoropropylene oxide oligomer
  • Method and device for preparing hexafluoropropylene oxide oligomer

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Under nitrogen protection, 2.0g of potassium fluoride, 600g of diethylene glycol dimethyl ether, 50.0g of N,N,N',N',-tetramethylethylenediamine, 2.0g of triethylamine and The catalyst system solution composed of 2.0g of water is moved into the tubular reactor, and the catalyst solution is started to circulate in the tubular reactor through a diaphragm metering pump. The flow rate of the catalyst solution is 6L / h, and the temperature of the cooling tank is controlled. to 5°C, replace the air in the reaction device, and apply an initial pressure of 0.1MPa with nitrogen; when no bubbles are observed in the pipeline reactor and the temperature of the catalyst solution remains stable, HFPO is continuously introduced at a certain rate to adjust the pressure of HFPO in the pipeline. The dwell time is 8s. In the early stage of the reaction, the pressure rose slowly to 0.3MPa, and when there were no bubbles at the outlet of the pipeline, the pressure began to remain stable. At ...

Embodiment 2

[0060] Under nitrogen protection, 2.0g of potassium fluoride, 600g of diethylene glycol dimethyl ether, 50.0g of N,N,N',N',-tetramethylethylenediamine, 2.0g of triethylamine and The catalyst system solution that the water of 2.0g forms is moved in the tubular reaction device, and the catalyst solution is started to circulate in the tubular reactor by a diaphragm metering pump, the catalyst flow rate is 6L / h, and the temperature of the cooling tank is controlled to be 5°C, replace the air in the reaction device, and apply an initial pressure of 0.1MPa with nitrogen; when no bubbles are observed in the pipeline reactor and the temperature of the catalyst solution remains stable, continue to feed HFPO at a certain rate to adjust the stay of HFPO in the pipeline The time is 4s. In the early stage of the reaction, the pressure rose slowly to 0.5MPa, and when there were no bubbles at the outlet of the pipeline, the pressure began to remain stable. At this time, transparent crude pr...

Embodiment 3

[0063] Under nitrogen protection, 2.0g of potassium fluoride, 600g of diethylene glycol dimethyl ether, 50.0g of N,N,N',N',-tetramethylethylenediamine, 2.0g of triethylamine and The catalyst system solution composed of 2.0g of hydrofluoric acid is moved into the tubular reactor, and the catalyst solution is started to circulate in the tubular reactor through a diaphragm metering pump. The flow rate of the catalyst solution is 6L / h and the cooling tank is controlled The temperature is 5°C, the air in the reaction device is replaced, and the initial pressure of 0.1MPa is applied by nitrogen; when no bubbles are observed in the pipeline reactor and the temperature of the catalyst solution remains stable, HFPO is continuously introduced at a certain rate to adjust the flow of HFPO in the pipeline. The residence time is 8s. In the early stage of the reaction, the pressure rose slowly to 0.35MPa, and when there were no bubbles at the outlet of the pipeline, the pressure began to rem...

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Abstract

The invention discloses a method and a device for preparing a hexafluoropropylene oxide oligomer. The device comprises a pipeline reactor, a liquid phase separation tank connected with the pipeline reactor, and a gas-liquid separation tank connected with the liquid phase separation tank, the pipeline reactor comprises a spiral pipeline filled with a filler, the spiral pipeline spirally extends vertically, a gas-liquid contact port is arranged at the upper end of the spiral pipeline, a the hexafluoropropylene oxide and catalyst mixed solution enters the pipeline reactor through the gas-liquid contact port, and flows from the upper end to the lower end along the spiral pipeline, a hexafluoropropylene oxide oligomer generated in the pipeline reactor flows into the liquid phase separation tankand realizes layering, a discharge valve is arranged at the outlet of the liquid phase separation tank, and the flow rate is controlled by the discharge valve to make the weight of the product flowing into the gas-liquid separation tank consistent with the weight of the product deposited in the liquid phase separation tank. The method and the device can increase the yield of hexafluoropropylene oxide oligomer.

Description

technical field [0001] The invention relates to fluorine chemical technology, in particular to the preparation technology of hexafluoropropylene oxide oligomer. Background technique [0002] Hexafluoropropylene oxide oligomer is an important organic fluorine intermediate in the material industry. It contains only three elements, C, F, and O. It has excellent thermal stability, oxidation resistance, mechanical stability, radiation resistance and corrosion resistance. Performance and other aspects are excellent, and the application is very wide. For example: Hexafluoropropylene oxide dimer acyl fluoride can react with carbonate to prepare perfluoro-n-propyl vinyl ether (PPVE), which is an important fluorine-containing monomer and is used for the modification of fluoroplastics and fluororubbers , improve product performance. Hexafluoropropylene oxide trimer or tetramer acyl fluoride can be further reacted to prepare a series of oxygen-containing fluorocarbon surfactants. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/11C07C41/02
CPCC07C41/02C07C43/11
Inventor 王章明龚元庞赵景平包俊陈爱民余锋
Owner ZHEJIANG XINGTENG CHEM
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