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Preparation method of 2,2,3,3,3-pentafluoropropanol

A technology of pentafluoropropanol and pentafluoropropane, which is applied in the field of preparation of 2,2,3,3,3-pentafluoropropanol, can solve the problems of expensive reagents, many synthesis steps, complicated operation, etc., and achieve the synthesis Fewer steps, high activity, simple preparation

Inactive Publication Date: 2018-04-17
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing methods for synthesizing 2,2,3,3,3-pentafluoropropanol are mainly addition method and catalytic hydrogenation method, both of which have many synthetic steps, complicated operation, expensive reagents, and low yield.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The batch liquid phase fluorination reaction was carried out in a stirred 300mL stainless steel autoclave. Put 1g of Pt-Fe into the reactor in sequence 3 o 4 / C catalyst (wherein the mass percent composition of Pt is 1, and the mass percent composition of Fe is 0.5%), 100g isopropanol, 5g potassium persulfate, 80g 1,1,1,2,2-pentafluoropropane, Raise the temperature to 80°C, cool down after 2 hours of reaction, and analyze the organic phase by gas chromatography, the results show that the conversion rate of 1,1,1,2,2-pentafluoropropane is 85.3%, 2,2,3,3,3-pentafluoropropane Alcohol selectivity was 78.1%.

Embodiment 2～4

[0018] Examples 2-4 The method for preparing 2,2,3,3,3-pentafluoropropanol is the same as that of Example 1, the difference is that the mass percentage of Pt is changed, and the reaction results are shown in Table 1.

[0019] Table 1

[0020]

Embodiment 5～7

[0022] The method for preparing 2,2,3,3,3-pentafluoropropanol in Examples 5-7 is the same as that in Example 1, except that the mass percentage of Fe is changed. The reaction results are shown in Table 2.

[0023] Table 2

[0024]

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Abstract

The invention discloses a preparation method of 2,2,3,3,3-pentafluoropropanol. In the presence of a load type precious metal composite catalyst, a solvent and an oxidizing agent, 1,1,1,2,2-perfluoropropane is catalytically oxidized by a one-step method to prepare the 2,2,3,3,3-pentafluoropropanol, wherein the mass ratio of the 1,1,1,2,2-perfluoropropane: the catalyst: the solvent: the oxidizing agent is 1: 0.01-0.1: 0.5-2: 0.05-0.5. The preparation method of the 2,2,3,3,3-pentafluoropropanol has the advantages of less reaction steps, simplicity in operation, cheap and easily obtained raw materials, high yield and gentle reaction conditions.

Description

technical field [0001] The invention belongs to the field of fluorine chemical industry and relates to a preparation method of 2,2,3,3,3-pentafluoropropanol. Background technique [0002] ODS cleaning agent (ODS is the abbreviation of "Ozone Depleting Substance", which means "substance that depletes the ozone layer") is an important substance commonly used in human life and industry. It has the characteristics of low toxicity, non-combustibility, and chemical inertness. It is widely used as refrigerant, foaming agent, spray, and cleaning agent for electronic components and precision parts. It is widely used in households and all walks of life, and has become an indispensable product in modern life. [0003] However, ODS cleaning agents have a strong destructive effect on the ozone layer, and at the same time cause global warming. According to the "Montreal Protocol on Substances that Deplete the Ozone Layer" and "China's Cleaning Industry ODS Overall Phase-out Plan" and "Ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/38C07C29/48B01J23/89B01J23/644B01J23/42B01J23/63B01J23/656B01J23/60B01J23/58B01J27/13B01J27/10B01J29/03
CPCB01J23/42B01J23/58B01J23/60B01J23/63B01J23/6447B01J23/6562B01J23/8906B01J23/8913B01J23/892B01J23/8926B01J27/10B01J27/13B01J29/0341C07C29/48C07C31/38
Inventor 吕剑唐晓博杨志强韩升张伟赵波亢建平郝志军
Owner XIAN MODERN CHEM RES INST
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