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Preparation process of perfluoropolyether surfactant and perfluoropolyether surfactant

A surfactant and perfluoropolyether technology, applied in the field of perfluoropolyether surfactants, can solve the problems of high metal ion content, unfavorable industrial production, and easy equipment occurrence, so as to achieve reasonable process, reduce impurities and avoid waste Effect

Pending Publication Date: 2022-02-11
四川弘氟新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to provide a kind of preparation technology of perfluoropolyether surfactant and perfluoropolyether surfactant, to solve the problems of hydrolysis and peroxygen removal in the process of preparing perfluoropolyether surfactant in the prior art. The process corrodes the equipment seriously, and equipment accidents are prone to occur, which is not conducive to industrial production and the technical problems of the high content of metal ions in the final product

Method used

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  • Preparation process of perfluoropolyether surfactant and perfluoropolyether surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of perfluoropolyether surfactants:

[0042] 1.1 Raw material

[0043] The molar ratio of hexafluoropropylene to chlorotrifluoroethylene is 9:1.

[0044] 1.2 Preparation process

[0045] Concrete preparation steps are:

[0046] (1) Photooxidation

[0047] Place hexafluoropropylene and chlorotrifluoroethylene in a photochemical reactor (volume 10 L), and feed oxygen into the photochemical reactor to carry out photooxidation reaction; continue to add oxygen during the photooxidation reaction, and keep the oxygen excess all the time. And keep the pressure in the photochemical reactor at normal pressure, the wavelength of ultraviolet light used in the photooxidation reaction is 380nm, the power of the light source is 400w; the temperature is -40°C, and the reaction time is 7h;

[0048] (2) Monomer recovery

[0049] After the photooxidation step is completed, the unreacted hexafluoropropylene is collected in a fixed storage tank, and the monomer recovery temper...

Embodiment 2

[0057] Preparation of perfluoropolyether surfactants:

[0058] 2.1 Raw materials

[0059] The molar ratio of hexafluoropropylene to chlorotrifluoroethylene is 1:1.

[0060] 2.2 Preparation process

[0061] Concrete preparation steps are:

[0062] (1) Photooxidation

[0063] Place hexafluoropropylene and chlorotrifluoroethylene in a photochemical reactor (volume 10 L), and feed oxygen into the photochemical reactor to carry out photooxidation reaction; continue to add oxygen during the photooxidation reaction, and keep the oxygen excess all the time. And keep the pressure in the photochemical reactor at 0.05MPa, the wavelength of ultraviolet light used in the photooxidation reaction is 400nm, the power of the light source is 200w; the temperature is -70°C, and the reaction time is 10h;

[0064] (2) Monomer recovery

[0065] After the photooxidation step is completed, the unreacted hexafluoropropylene is collected in a fixed storage tank, and the monomer recovery temperatur...

Embodiment 3

[0073] Preparation of perfluoropolyether surfactants:

[0074] 3.1 Raw material

[0075] The molar ratio of hexafluoropropylene to chlorotrifluoroethylene is 5:1

[0076] 3.2 Preparation process

[0077] Concrete preparation steps are:

[0078] (1) Photooxidation

[0079] Place hexafluoropropylene and chlorotrifluoroethylene in a photochemical reactor (volume 10 L), and feed oxygen into the photochemical reactor to carry out photooxidation reaction; continue to add oxygen during the photooxidation reaction, and keep the oxygen excess all the time. And keep the pressure in the photochemical reactor at 0MPa, the wavelength of ultraviolet light used in the photooxidation reaction is 200, the power of the light source is 600w; the temperature is -30°C, and the reaction time is 4h;

[0080] (2) Monomer recovery

[0081] After the photooxidation step is completed, the unreacted hexafluoropropylene is collected in a fixed storage tank, and the monomer recovery temperature is 40°...

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Abstract

The invention provides a preparation process of a perfluoropolyether surfactant and the perfluoropolyether surfactant, and solves the problems that in the process of preparing a perfluoropolyether surfactant in the prior art, equipment is seriously corroded in hydrolysis and peroxidation removal processes, equipment accidents are easy to occur, the industrial production is not facilitated, and the content of metal ions in the product is high. According to the method, hexafluoropropylene, chlorotrifluoroethylene and oxygen are used as raw materials, and are sequentially subjected to the steps of photo-oxidation, monomer recovery, peroxide group removal, rectification, hydrolysis, washing and neutralization to prepare a uniform and stable polymer aqueous solution, namely a finished product of the perfluoropolyether surfactant. The obtained perfluoropolyether surfactant is a stable polymer aqueous solution, is stable in product structure, and can be widely applied to surfactants synthesized from fluororubber (FKM), polyvinylidene fluoride resin (PVDF), fluorinated ethylene propylene resin (FEP), polytetrafluoroethylene resin (PTFE) and the like in organic fluorine polymer series.

Description

technical field [0001] The invention relates to a preparation process of a perfluoropolyether surfactant and the perfluoropolyether surfactant. Background technique [0002] Fluorine-containing surfactants are surfactants with fluorocarbon chains as non-polar groups, that is, fluorine atoms replace part or all of the hydrogen atoms on the hydrocarbon chains. For a long time, fluorine-containing carboxylic acid or fluorine-containing alkyl sulfonic acid surfactants with linear structure have been widely used in the production process of fluorine-containing polymer emulsion polymerization, and their representative substances are fluorine-containing octanoic acid and fluorine-containing octyl sulfonic acid. This type of fluorine-containing surfactant is not easy to be decomposed by nature, and it is easy to accumulate in the natural environment, and this type of substance has been proven to be harmful to the human body. Therefore, this class of substances has gradually been a...

Claims

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Application Information

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IPC IPC(8): C08G65/00
CPCC08G65/007C08G2650/48
Inventor 苟文珊李斌周武刚杨强周昱昂
Owner 四川弘氟新材料有限公司
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