Unlock instant, AI-driven research and patent intelligence for your innovation.

Synthetic method of perfluoroalkyl iodide telomer with relatively short chain length

A technology of perfluoroalkyl iodide and synthesis method, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., can solve the problems of long time required for preparation, and achieve Effects of promoting stability, less impurities, and high yield

Active Publication Date: 2019-07-09
SHANDONG DONGYUE POLYMER MATERIAL
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As another example, Chinese patent document CN101648845A discloses a preparation method of a short-chain perfluoroalkyl iodide, the structural formula of which is CF 3 CF 2 (CF 2 CF 2 )nI, wherein n=1 or 2, the method comprises the step of making pentafluoroiodoethane and tetrafluoroethylene carry out catalytic telomerization reaction in the presence of a catalyst, wherein the catalyst is platinum, zirconium in the form of powder or carrier metal , niobium, tantalum or their alloys, before carrying out the catalytic telomerization reaction, make the catalyst in pentafluoroiodoethane, keep stirring at a temperature of 60°C-120°C for 20-150 minutes; The content of perfluoroalkyl iodide is greater than 90%, but the content of shorter chain length (n=2 and 3) perfluoroalkyl iodide telomer is less, and the preparation time is longer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthetic method of perfluoroalkyl iodide telomer with relatively short chain length
  • Synthetic method of perfluoroalkyl iodide telomer with relatively short chain length

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of synthetic method of shorter chain length perfluoroalkyl iodide telomer, comprising steps:

[0038] 600ml stainless steel vertical reaction kettle, after drying and removing water, add 10g of electrolytic copper powder with an average particle size of 200 mesh and 2g of p-picoline. After the kettle was evacuated, it was replaced with dry nitrogen to remove oxygen. The oxygen content is below 10ppm. Add C to the kettle with a catalyst pump at room temperature 2 f 5 1 780g, open stirring, pass into tetrafluoroethylene, be warming up to start reaction, when rising to 80 ℃, pressure is about 2MPa, when the pressure in the kettle drops to 1.8MPa, pass into tetrafluoroethylene again to pressure be 2MPa, Repeat several times, after the total input amount of tetrafluoroethylene reaches 100g, react for 15min until the pressure no longer changes, cool down and recover unreacted C 2 f 5 I, to obtain the product C 2 f 5 (CF 2 CF 2 ) n I have a total of 247g. Aft...

Embodiment 2

[0043] A kind of synthetic method of shorter chain length perfluoroalkyl iodide telomer, comprising steps:

[0044] 600ml stainless steel vertical reaction kettle, after drying and removing water, add 8g of tin powder with an average particle size of 300 mesh and 2g of p-propylpyridine. After the kettle was evacuated, it was replaced with dry nitrogen to remove oxygen. The oxygen content is below 10ppm. Add C to the kettle with a catalyst pump at room temperature 2 f 5 1 800g, open stirring, pass into tetrafluoroethylene, be warming up to start reaction, when rising to 75 ℃, pressure is about 2MPa, when the pressure in the kettle drops to 1.7MPa, pass into tetrafluoroethylene again to pressure and be 2MPa, Repeat several times, after the total input amount of tetrafluoroethylene reaches 80g, react for 18min until the pressure no longer changes, lower the temperature, and recover unreacted C 2 f 5 I, to obtain the product C 2 f 5 (CF 2 CF 2 ) n I have a total of 206g. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a synthetic method of perfluoroalkyl iodide telomer with relatively short chain length. The synthetic method of perfluoroalkyl iodide telomer with relatively short chain lengthcomprises a following step: under protection of a protective gas, and under the catalytic effect of a metal catalyst and a cocatalyst, a fluoroolefin containing monomer and a telomerization monomer RfI are subjected to telomerization reaction so as to obtain a finished product; wherein the cocatalyst is a pyridine derivative capable of achieving coordination effect; the general formula of the fluoroolefin containing monomer is CF2=CR1(R2), wherein R1 and R2 are fluorine atoms or C1-4 saturated perfluoroalkyl groups, R1 and R2 can be the same or different; in the telomerization monomer RfI, Rfis C2-4 perfluoroalkyl groups; and the general formula of the perfluoroalkyl iodide telomer with relatively short chain length is Rf(CF2CR1(R2))nI, and n=2-3. The synthetic method is capable of increasing target reaction conversion rate and selectivity on the product with relatively short chain length; the product is high in the content of the product with relatively short chain length; the molecular weight distribution range is narrow; and yield is high.

Description

technical field [0001] The invention relates to a method for synthesizing a relatively short-chain-length perfluoroalkyl iodide telomer, and belongs to the technical field of perfluorinated fine chemical intermediates. Background technique [0002] As we all know, perfluoroalkyl iodides are monoiodoperfluoroalkane compounds in which hydrogen atoms are completely replaced by fluorine atoms. They are generally composed of a series of perfluoroalkyl groups with different chain lengths. The most valuable ones are those with 6 carbon atoms. Shorter chain length perfluoroalkyl iodides of -12. Perfluoroalkyl iodide is a key intermediate in the production of fluorine finishing agents, fluorine-containing surfactants and other fluorine-containing fine chemicals. Its downstream products are used in light water fire extinguishing agents, magnetic recording materials, water and oil repellent fabric finishes, Paper finishing agent, oil field chemistry, photosensitive material, high-grad...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07C17/278C07C19/16B01J31/02
CPCC07C17/278B01J31/0244B01J23/14B01J23/72B01J2231/20B01J35/19C07C19/16
Inventor 陈越马鹏飞黄玉伟
Owner SHANDONG DONGYUE POLYMER MATERIAL