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Method and device for controllable polymerization of hexafluoropropylene dimer

A technology for hexafluoropropylene dimer and hexafluoropropylene, which is applied in the field of controllable polymerization methods and devices of hexafluoropropylene dimer, can solve problems such as cumbersome post-processing, and achieves low cost, improved utilization rate, and economic benefits significant effect

Inactive Publication Date: 2019-04-19
TIANJIN CHANGLU CHEM NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid-phase method has a higher primary conversion rate and yield, better selectivity by adjusting the process parameters, lower requirements for reaction control than the gas-phase method, and less investment in pilot equipment, but requires no water for raw materials, catalysts, and solvents. Post-processing is more cumbersome

Method used

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  • Method and device for controllable polymerization of hexafluoropropylene dimer
  • Method and device for controllable polymerization of hexafluoropropylene dimer

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Example 1: Preparation of raw materials for hexafluoropropylene dimer: pass hexafluoropropylene gas through a catalytic reaction tube equipped with a NaF / Al2O3 catalyst, the loading of the catalyst is 10%, and the contact time is 0.1s; the temperature of the catalytic reaction tube The temperature is 150°C. The reacted mixed gas enters the condenser with a cooling jacket from the gas port inlet. The temperature of the condensed water is 10°C. The unreacted hexafluoropropylene is circulated to the catalytic reaction tube through the gas outlet. The purity of the liquid hexafluoropropylene dimer in the receiver of the condenser was detected to be 99.3%. The yields of hexafluoropropylene dimer are shown in Table 1.

Embodiment 2

[0019] Example 2: Preparation of raw materials for hexafluoropropylene dimer: Hexafluoropropylene gas is passed through a catalytic reaction tube equipped with an AgF / C catalyst, the loading capacity of the catalyst is 15%, the temperature of the catalyst packed column is 180°C, and the contact time is For 10s, the reacted mixed gas enters the condenser with a cooling jacket through the air inlet, and the temperature of the condensed water is 10°C; the unreacted hexafluoropropylene is circulated to the catalytic reaction column through the outlet. The purity of the liquid hexafluoropropylene dimer in the condenser is 99.2%. The productive rate of hexafluoropropylene dimer after applying mechanically is shown in Table 1.

Embodiment 3

[0020] Embodiment 3: the preparation of hexafluoropropylene dimer raw material: hexafluoropropylene gas is passed through the catalytic reaction tube that KF / C catalyst is housed, and the loading capacity of catalyst is 20%, and the temperature of catalyst packing column is 220 ℃, contact time The reaction time is 30s; the reacted mixed gas enters the condenser with a cooling jacket through the air inlet, the temperature of the condensed water is 10°C, and the unreacted hexafluoropropylene is circulated to the catalytic reaction tube through the outlet. The purity of the liquid hexafluoropropylene dimer in the condenser is 99.3%. The productive rate of hexafluoropropylene dimer after applying mechanically is shown in Table 1.

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Abstract

The invention belongs to the field of fluorine chemical industry, and concretely relates to a method and a device for controllable polymerization of a hexafluoropropylene dimer. The hexafluoropropylene dimer is obtained by a gas phase reaction of hexafluoropropylene under the catalysis of a supported ionic fluoride; the reaction temperature is 150-220 DEG C; the contact time is 0.1-30 s; the loadcapacity of the ionic fluoride is 10-20%; the carrier is activated carbon, alumina, silica or magnesia; and the ionic fluoride is AgF, NaF, KF, RbF Or CsF. The above new route is suitable for existingenterprises for producing fluoride products, and realizes the characteristics of long-term recycling, low cost and remarkable economic benefit.

Description

technical field [0001] The invention belongs to the field of fluorine chemical industry, and in particular relates to a controllable polymerization method and device of hexafluoropropylene dimer. Background technique [0002] The oligomerization of hexafluoropropylene to obtain dimers and trimers are very useful chemical raw materials, and can be derived from many fluorine-containing surfactants. The hydrophobic perfluorocarbon chain of hexafluoropropylene oligomer is highly branched, which adds some special physical properties compared with general linear perfluorosurfactants. It can be used alone or in combination with other surfactants, so it can play a unique role in detergents, plastic coatings, textiles, leather, petroleum, electronics, pigments and other fields. For example: the perfluoroalkyl ether generated by the reaction of the oligomer of hexafluoropropylene and phenol can be reacted with oleum to produce a sulfonate-type fluorosurfactant. The reaction of perfl...

Claims

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Application Information

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IPC IPC(8): C07C17/281C07C21/18
CPCC07C17/281C07C21/18
Inventor 肖鑫姚素梅贺光瑞
Owner TIANJIN CHANGLU CHEM NEW MATERIAL CO LTD
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