Preparation method of D2 structure hexafluoropropylene dimer

A technology of hexafluoropropylene dimer and hexafluoropropylene, which is applied in the field of chemical technology, can solve the problems of high degree of dissociation and easy aggregation of fluoride anions, and achieve the effect of improving overall performance, reducing the degree of dissociation, and realizing dispersion

Pending Publication Date: 2022-01-14
ZHEJIANG JUHUA HANZHENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The isomer content of the D1 structure in the currently prepared hexafluoropropylene dimer is more than 90%, while the preparation method of the D2 structure hexafluoropropylene dimer is less, and the

Method used

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  • Preparation method of D2 structure hexafluoropropylene dimer
  • Preparation method of D2 structure hexafluoropropylene dimer
  • Preparation method of D2 structure hexafluoropropylene dimer

Examples

Experimental program
Comparison scheme
Effect test

Example

[0042] Catalyst Preparation Example 1

[0043] (1) 5 g of 3-mercaptoic acid, 3 g of vinyl boric acid, 3G vinyl boric acid, adding 2 g of sodium ethanol, stirred to 50 ° C, and the pressure is 0.8 MPa, and the reaction is 100 min, and the reaction is 100 min, resulting in 100 min Additive A;

[0044] (2) The aid A and 25 g of fluorinated potassium fluoride were then mixed for 10 hours, and the molar ratio of the auxiliary agent A and potassium fluoride was 1: 1, and the acetonitrile was evaporated to obtain an isomerization catalyst 1.

Example

[0045] Catalyst Preparation Example 2

[0046] (1) 12 g of 3-mercaptopopyridine, 6 g of vinyl boric acid, 6 g of acetonitrile, 6 g of acetonitrile, and 6 g of sodium ethanol, stirred to 65 ° C, and the pressure is 2.0 MPa, resulting in 150 min Additive A;

[0047] (2) The aid A and 36 g of potassium fluorinated potassium fluoride were subsequently mixed for 20 hours, and the molar ratio of the auxiliary agent A and potassium fluoride was 1: 1.5, and the acetonitrile was evaporated to obtain an isomerization catalyst 2.

Example Embodiment

[0048] Example 1

[0049] (1) gather react

[0050] Corium fluoride, calcined by 400 ° C for 10 h, after polishing into a powder, together with anhydrous acetonitrile, mixed with anhydrous acetonitrile, stir mix well, bubble 5 min, then empty, stirring argon circulation 3 times, in vacuum Under the conditions, 20 g of hexafluoropropylene was charged, the control temperature was 30 ° C, the pressure was 0.8 MPa, stirred for 2 h, stirring the rotation speed of 50 r / min, and the reaction was 50 ° C after completing the reaction, then the residual hexafluoropropylene gas was discharged. The liquid is obtained by the lower liquid; in the high pressure reactor;

[0051] (2) isomerization reaction

[0052] 0.5 g of isomerization catalyst 1 was added to the high pressure reactor, and the nitrogen gas was hit by temperature to 100 ° C, and the reaction was 60 min, and the reaction was cooled to room temperature. Propylene dimer.

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Abstract

The invention relates to the technical field of chemical processes, in particular to a preparation method of a D2 structure hexafluoropropylene dimer. According to the preparation method of the D2 structure hexafluoropropylene dimer, 5-bromine-6-sulfydryl pyridine and vinyl trifluoroborate are subjected to a sulfydryl-alkene reaction, the prepared auxiliary is added into metal fluoride, the valence state of metal can be stabilized, the catalytic activity can be improved, and high dispersion of active components in a fluorine-containing catalyst is achieved.

Description

technical field [0001] The invention relates to the technical field of chemical technology, in particular to a preparation method of a D2 structure hexafluoropropylene dimer. Background technique [0002] Because the fluorine atoms replace the hydrogen atoms in the molecule, the hexafluoropropylene dimer has good thermal and chemical stability; and because it contains double bonds, it can be further reacted to prepare various fluorine-containing derivatives. These derivatives It can be used as pharmaceuticals, pesticide intermediates, fluorine-containing surfactants, water and oil repellent additives, fluorine-containing polymer monomers, solvents, and inert liquids. Therefore, it is of great practical significance to study the development and utilization of hexafluoropropylene dimer and its derivatives. [0003] The applicant's previous application, CN201911361617.5, relates to the field of fine chemicals, and specifically relates to a method for preparing a high-reactivit...

Claims

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Application Information

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IPC IPC(8): C07C17/358C07C21/18C07C17/281
CPCC07C17/358C07C17/281C07C21/18
Inventor 张军良周强岳亚伟段仲刚刘明生林久明
Owner ZHEJIANG JUHUA HANZHENG NEW MATERIAL
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