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Method for preparing 2-bromo-1,1,1,2,3,3,3-heptafluoropropane

A technology of heptafluoropropane and hfc-227ea, which is applied in the preparation of halogenated hydrocarbons, chemical instruments and methods, organic chemistry, etc., can solve the problems of unobtainable raw materials, complex synthesis process, low yield and the like, achieves easy control, and overcomes the synthesis process. Sophisticated, easy-to-use effects

Active Publication Date: 2014-06-25
SINOCHEM LANTIAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the disadvantages of 2-bromo-1,1,1,2,3,3,3-heptafluoropropane in the prior art that the synthesis process is complicated, the yield is low, the raw materials are not easy to obtain, and the product separation and purification are difficult, the present invention provides a process route A novel preparation of 2-bromo-1,1,1,2,3,3,3-heptafluoropropane that is simple, high in yield, low in cost, readily available in raw materials, simple in product separation and purification, easy to control in the reaction process, and capable of industrial continuous production craft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-12

[0022] Control contact time 23s and HFC-227ea / Br 2 The molar proportion is 1.8, and under other conditions unchanged, only the reaction temperature is changed to carry out the test, which is marked as embodiment 1-12, and the test results are listed in Table 1.

[0023] The influence result of table 1 temperature on reaction

[0024] Example

Embodiment 13-18

[0026] Control the reaction temperature at 450°C and the raw material HFC227ea / Br 2 Under the condition of molar ratio 1.3, only change the contact time to carry out the test, marked as embodiment 13-19, and the test results are listed in Table 2.

[0027] The impact result of table 2 contact time on reaction

[0028] Example

Embodiment 20-27

[0030] Control the reaction temperature 450℃ and the reaction contact time 25s, only change the raw material HFC227ea / Br 2 The molar proportion is tested, marked as embodiment 20-27, and the test results are listed in Table 3.

[0031] Table 3HFC227ea / Br 2 Effect of molar ratio on reaction results

[0032] Example

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Abstract

The invention provides a novel method for synthesizing 2-bromo-1,1,1,2,3,3,3-heptafluoropropane, which uses 1,1,1,2,3,3,3-heptafluoropropane and bromine as raw materials and has the advantages of simple process route, high yield, low cost, readily available raw materials, simple product separation and purification, easily-controllable reaction process and industrial continuous production. The 2-bromo-1,1,1,2,3,3,3-heptafluoropropane prepared by the method can be used for synthesizing pesticides, medicaments, surfactants, rubber materials, mold releases, waterproof reagents, oilproof reagents, gas separation membrane materials, dye-resistant materials, antifouling paints, weathering resistant materials, paper transforming agents, fabric treatment agents, heat-resistant resins and the like.

Description

technical field [0001] The invention relates to a preparation method of fluorine-containing organic compound 2-bromo-1,1,1,2,3,3,3-heptafluoropropane. Background technique [0002] Perfluoroalkylated aniline derivatives can be used in the synthesis of pesticides, pharmaceuticals, surfactants, rubber materials, release agents, waterproof and oily agents, optical materials, gas separation membrane materials, anti-staining materials, anti-fouling coatings, anti-fouling Weathering materials, paper converting agents, fabric treatment agents and heat-resistant resins, etc. The most representative one is 2-bromo-1,1,1,2,3,3,3-heptafluoropropane, which is especially suitable as a pesticide intermediate. [0003] For the preparation method of 2-bromo-1,1,1,2,3,3,3-heptafluoropropane, the following reports are currently arranged: [0004] Chinese patent CN1498881A discloses a method for preparing 2-bromo-1,1,1,2,3,3,3-heptafluoropropane by using hexafluoropropylene as a raw material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C19/14C07C17/10
Inventor 韩国庆徐卫国
Owner SINOCHEM LANTIAN