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A kind of method for preparing octafluoro-2-butene

A technology of butene and tetrafluoroethane, which is applied in the field of preparation of fluorine-containing olefins, and can solve problems such as difficult availability of raw materials

Active Publication Date: 2022-04-15
ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Raw materials used in this method are not readily available

Method used

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  • A kind of method for preparing octafluoro-2-butene
  • A kind of method for preparing octafluoro-2-butene
  • A kind of method for preparing octafluoro-2-butene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The reaction in the presence of tetramethylethylenediamine, CuCl and DMF is illustrated.

[0047] Add 100g (1.37mol) of N,N-dimethylformamide, 12.8g (0.2mol) of 400-mesh copper powder, 23.2g (0.2 mol), cuprous chloride 1.0g (0.01mol), with high-purity N 2 Purge for 10 minutes, then pour 17.1g (0.1mol) of CFC-114a from the steel cylinder into the reactor, heat up to 80°C under mechanical stirring (300-500r / m), raise the pressure of the reactor to about 0.4MPa, and keep it warm for 12 hours , to end the reaction.

[0048] The reaction products include gas phase components and liquid phase components. According to GC-MS analysis, both gas phase components and liquid phase components contain 1,1,1,2,3,4,4,4-octafluoro-2- Butene, see Table 1 for details. In Table 1, the percentage of each compound is an area percentage, and impurities with an area percentage of less than 0.05% are not included in Table 1.

[0049] Table 1, embodiment 1 reaction product GC area percentage...

Embodiment 2

[0054] The reaction in the presence of ethylenediamine, CuCl and DMF is illustrated.

[0055] Add 100g (1.37mol) of N,N-dimethylformamide, 12.8g (0.2mol) of 400 mesh copper powder, 12.02g (0.2mol) of ethylenediamine, Cuprous chloride 1.0g (0.01mol), with high-purity N 2 Purge for 10 minutes, then pour 17.1g (0.1mol) of CFC-114a from the steel cylinder into the reactor, raise the temperature to 80°C under mechanical stirring (300-500r / m), and raise the pressure of the reactor to about 0.38MPa, and keep it warm for 12 hours . End the reaction.

[0056] The reaction products include gas phase components and liquid phase components. According to GC-MS analysis, both gas phase components and liquid phase components contain 1,1,1,2,3,4,4,4-octafluoro-2- Butene, see Table 2 for details. In Table 2, the percentage of each compound is an area percentage, and impurities with an area percentage of less than 0.05% are not included in Table 2.

[0057] Table 2, embodiment 2 reaction p...

Embodiment 3

[0062] The reaction in the presence of 2,2'-bipyridine, CuCl and DMF is illustrated.

[0063] Add 100g (1.37mol) of N,N-dimethylformamide, 12.8g (0.2mol) of 400-mesh copper powder, and 31.24g ( 0.2mol), cuprous chloride 1.0g (0.01mol), with high-purity N 2 Purge for 10 minutes, then pour 17.1g (0.1mol) of CFC-114a from the steel cylinder into the reactor, heat up to 80°C under mechanical stirring (300-500r / m), raise the pressure of the reactor to about 0.4MPa, and keep it warm for 12 hours , the reaction ends.

[0064] The reaction products include gas phase components and liquid phase components. According to GC-MS analysis, both gas phase components and liquid phase components contain 1,1,1,2,3,4,4,4-octafluoro-2- Butene, see Table 3 for details. In Table 3, the percentage of each compound is an area percentage, and impurities with an area percentage of less than 0.05% are not included in Table 3.

[0065] Table 3, embodiment 3 reaction product GC area percent

[0066] ...

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Abstract

The invention discloses a method for preparing octafluoro-2-butene, comprising Cu + Under the action of a procatalyst and a cocatalyst including an organic amine, 2,2‑dichloro1,1,1,2‑tetrafluoroethane reacts with copper to give 1,1,1,2,3,4,4,4 ‑Octafluoro‑2‑butene. The preparation method provided by the invention has the advantages of novel synthetic route, readily available raw materials, low cost and suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of fluorine-containing olefin, in particular to a preparation method of octafluoro-2-butene. Background technique [0002] Octafluoro-2-butene, referred to as "C4F8", is an important fluorine-containing fine chemical product, with an ozone depletion potential (ODP) of 0 and a low GWP value. It can be used as a polymer monomer, and can also be used with other The compounding of ODS substitutes can be applied in fields such as refrigeration, foaming and fire extinguishing. Octafluoro-2-butene has two isomers of Z-type and E-type, among which: Z-type isomer has a boiling point of 1.2°C, ASHRAE number is Z-PFC 1318my; E-type isomer has a boiling point of 8.3±8.0°C , ASHRAE number E-PFC 1318my, as follows: [0003] [0004] For the preparation method of octafluoro-2-butene, following reports are arranged in the prior art: [0005] (1) Petrov et al. (Petrov V A, Krespan C G.J.Fluorine Chem.102 (2000) 199-20...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/269C07C21/18
CPCC07C17/269C07C21/18
Inventor 吴海锋刘武灿赵翀盛楠
Owner ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI TECH
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