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Method for preparing 1,1,2-trichlorine-3-fluoropropene

A technology for fluoropropene and tetrachloropropene, which is applied in the field of reaction to obtain 1, can solve the problems of high reaction temperature, low conversion rate and selectivity, and no reaction data is given, and achieves the effects of good selectivity and high conversion rate.

Active Publication Date: 2015-02-11
山东华安近代环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent does not provide specific relevant reaction data. From the disclosed content, it can be seen that the reaction temperature of this method is high, and the conversion rate and selectivity are low.

Method used

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  • Method for preparing 1,1,2-trichlorine-3-fluoropropene
  • Method for preparing 1,1,2-trichlorine-3-fluoropropene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add triethylamine 3HF (9.0g, 0.056mol) and triethylamine (2.8g, 0.028mol) to a 50mL three-necked flask equipped with magnetic stirring, a thermometer, and a condensing device to prepare triethylamine 2HF, and then add 1,1,2,3-Tetrachloropropene (5.0g, 0.028mol), the molar ratio of triethylamine·2HF to 1,1,2,3-tetrachloropropene is 3, and the reaction temperature is 110°C After 2 hours, the conversion rate of 1,1,2,3-tetrachloropropene was 90%, and the selectivity of 1,1,2-trichloro-3-fluoropropene was 95%.

Embodiment 2～10

[0024] The operation is basically the same as in Example 1, except that the mol ratio, reaction temperature and The reaction time and reaction results are shown in Table 1.

[0025] Table 1

[0026]

Embodiment 12

[0028] Example 12 Prepare 1,1,2-trichloro-3-fluoropropene according to the same device in Example 1, add triethylamine·2HF (11.8g, 0.083mol), and then add 1,1,2,3- Tetrachloropropene (5.0g, 0.028mol), the molar ratio of triethylamine 2HF to 1,1,2,3-tetrachloropropene is 3, and the reaction temperature is 110°C for 2 hours, 1,1,2 , the conversion rate of 3-tetrachloropropene was 92%, and the selectivity of 1,1,2-trichloro-3-fluoropropene was 95%.

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Abstract

The invention discloses a method for preparing 1,1,2-trichlorine-3-fluoropropene. 1,1,2,3-tetrachloropropene and tertiary amine hydrofluoride serving as raw materials react to synthesize the 1,1,2-trichlorine-3-fluoropropene at the temperature of 50-150 DEG C for 2-5h, and the molar ratio of the tertiary amine hydrofluoride to the1,1,2,3-tetrachloropropene ranges from 1:1 to 10:1, wherein the general formula of the tertiary amine hydrofluoride is tertiary amine nHF, and 0<n<=3.0. The method is mainly used for preparing the 1,1,2-trichlorine-3-fluoropropene.

Description

technical field [0001] The present invention relates to a kind of preparation method of 1,1,2-trichloro-3-fluoropropene, especially relate to with 1,1,2,3-tetrachloropropene and tertiary amine hydrofluoride (general formula is tertiary amine. nHF) is a raw material, and the reaction obtains the preparation method of 1,1,2-trichloro-3-fluoropropene. Background technique [0002] The ozone depletion potential of 2,3,3,3-tetrafluoropropene (HFO-1234yf) is zero, the greenhouse effect potential is 4, and its environmental performance is excellent. It is considered to be an ideal substitute for HFC-134a. 1,1,2-Trichloro-3-fluoropropene can be used as a raw material for the preparation of HFO-1234yf. [0003] Patent WO2010045104 discloses the preparation method of 1,1,2-trichloro-3-fluoropropene, which uses tetrachloroethylene and fluoromethane as the reaction raw materials, in chlorine, carbon tetrachloride, trichlorotoluene, hexachloroethyl In the presence of free radical initi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C21/18C07C17/20
Inventor 吕剑曾纪珺张伟亢建平郝志军马辉韩升李凤仙
Owner 山东华安近代环保科技有限公司