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A kind of industrialized production method and production device of perfluoro-2-methyl-2-pentene

A production method and methyl technology, applied in the field of organic fluorine chemical preparation, can solve problems such as long reaction period, achieve the effects of fast reaction speed, improve equipment use efficiency, and improve product quality

Active Publication Date: 2018-05-22
浙江诺亚氟化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a long reaction cycle and is generally only suitable for batch reaction operations.

Method used

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  • A kind of industrialized production method and production device of perfluoro-2-methyl-2-pentene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Continuous dimerization synthesis of perfluoro-4-methyl-2-pentene proceeds in the following steps:

[0027]Add 12.2kg of anhydrous potassium fluoride, 15.8kg of 18-crown-6, and 200kg of acetonitrile into the 500L catalyst configuration kettle 1. Turn on the stirring to make the catalyst evenly mix and dissolve into the solvent. Open the bottom valve of the catalyst configuration tank, and measure and put 100 kg of catalyst-solvent system (hereinafter referred to as "system") into the pre-cooling tank 2. Turn on the pre-cooling tank to stir, and open the inlet and outlet valves of the refrigerant. The system was cooled to 10 °C. Open the bottom valve of the pre-cooling tank, turn on the metering pump, open the outlet valve of dimerization tubular reactor 3, meter the system at a rate of 300kg / h into the reactor (residence time 3min), and open the dimerization tubular reactor Stir. After the system is full of the reactor, slowly open the valve of the hexafluoropropyle...

Embodiment 2

[0030] Continuous dimerization synthesis of perfluoro-4-methyl-2-pentene proceeds in the following steps:

[0031] The same method was operated as in Example 1, except that the dimerization reaction temperature was 20°C.

[0032] Results: A total of 121.1kg of HFP (content 99.9493%) was introduced to obtain 119.9kg of dimers, of which HFP residue was 0.014%, the total content of dimers was 98.42%, and the total content of multimers was 1.27%. The yield was 97.49%

Embodiment 3

[0034] Continuous dimerization synthesis of perfluoro-4-methyl-2-pentene proceeds in the following steps:

[0035] The same method was operated as in Example 1, except that the dimerization reaction temperature was 0°C.

[0036] Results: A total of 121.7kg of HFP (content 99.9493%) was introduced to obtain 120.3kg of dimers, of which HFP residue was 0.14%, the total content of dimers was 99.02%, and the total content of multimers was 0.42%. The yield was 97.93%

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Abstract

The invention provides an industrial production method and production apparatus for perfluoro-2-methyl-2-pentene, belonging to the technical field of chemical preparation of organic fluorine. The industrial production method comprises the following steps: with hexafluoropropene as a main raw material, carrying out a continuous gas-liquid phase oligomerization reaction at 0 to 60 DEG C in the presence of a main catalyst to produce dimer perfluoro-4-methyl-2-pentene hexafluoropropylene biopolymer, wherein reaction retention time is 10 to 600 s; and subjecting the obtained perfluoro-4-methyl-2-pentene hexafluoropropylene biopolymer to a continuous liquid-phase catalytic isomerization reaction in an organic solvent in the presence of the main catalyst so as to convert the biopolymer into perfluoro-2-methyl-2-pentene, wherein reaction temperature is 70 to 200 DEG C, reaction pressure is 0.3 to 1.8 MPa, and reaction retention time is 180 to 3000 s. The objective of the invention is to provide the industrial production method with the advantages of simple operation, a high automation degree and capacity of inhibiting or reducing generation of by-products, improving the usage efficiency of equipment and reducing emission of waste gas, waste water and industrial residues.

Description

technical field [0001] The invention belongs to the technical field of organic fluorine chemical preparation, and in particular relates to an industrial production method and a production device of a perfluoroalkene compound, that is, a perfluoro-2-methyl-2-pentene. Background technique [0002] Perfluoro-2-methyl-2-pentene (1,1,1,3,4,4,5,5,5-nonafluoro-2-(trifluoromethyl)pent-4-ene) belongs to perfluoroalkene compounds , with a boiling point of 50.5°C and a colorless liquid at room temperature and pressure. It is mainly used as a synthetic surfactant, fabric treatment agent, paper treatment agent, etc. It can also be used in the manufacture of cleaning agents, fire extinguishing agents, foaming agents and heat transfer agents used in electronic components instead of chlorofluorocarbons. An important perfluoroolefin intermediate. [0003] The synthesis methods of perfluoro-2-methyl-2-pentene reported in the literature mainly include the following two types: one is the meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/281C07C21/18
CPCC07C17/281C07C21/18
Inventor 周孝瑞陶杨卢鸿武张招福
Owner 浙江诺亚氟化工有限公司
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