Isomerization process for fluorine-containing olefins

A fluorine-containing olefin, isomerization technology, applied in the field of olefin isomerization, can solve the problems of high reaction temperature, short catalyst activity period, low target product selectivity, etc., and achieve the effect of improving activity and reducing side reactions

Active Publication Date: 2020-08-07
ZHEJIANG RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above-mentioned isomerization method of fluorine-containing olefins, the reaction temperature is too high without using a catalyst, and in the case of using a catalyst, there are problems of short catalyst activity period and low selectivity of the target product

Method used

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  • Isomerization process for fluorine-containing olefins
  • Isomerization process for fluorine-containing olefins
  • Isomerization process for fluorine-containing olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 280.4g ZrOCl 2 ·8H 2 O and 30.6g Y(NO 3 ) 3 ·6H 2 O were formulated into 1 mol / L solutions respectively, mixed uniformly, and polyethylene glycol was added while stirring, so that the mass percentage of polyethylene glycol in the solution was 10%. Add ammonia solution with a mass fraction of 5% dropwise, adjust the pH value to 8.5, and age the precipitate for 3 hours, then wash with deionized water and suction filter until the AgNO 3 Assay does not detect Cl - . Add isobutanol to the filtered filter cake and stir for 0.5 hours. The volume ratio of filter cake to alcohol solution is 1:3. When the temperature is raised to 120°C, dynamic azeotropic distillation is performed to obtain primary powder. Raise the primary powder to 600°C at a rate of 5°C / min in a nitrogen atmosphere, and calcinate it for 2 hours to obtain Y / ZrO 2 Powder. 9.4g Cu(NO 3 ) 2 ·3H 2 O was made into a solution, and an equal volume of Y / ZrO was impregnated 2 The powder was then dried under ...

Embodiment 2

[0063] The same operation as in Example 1, the difference is that the fluorine-containing olefin isomerization catalyst is made of Zr(NO 3 ) 4 ·5H 2 O, La(NO 3 ) 3 ·6H 2 O, Co(NO 3 ) 3 ·6H 2 O was prepared according to the metal atomic mole percentage Co:La:Zr=15:10:75, and the flow rate of HFO-1234(E) was changed to 25mL / min. The results are shown in Table 1.

Embodiment 3

[0065] The same operation as in Example 1, the difference is that the fluorine-containing olefin isomerization catalyst is made of ZrOCl 2 ·8H 2 O, MgCl 2 、RuCl 3 It was prepared according to the molar percentage of metal atoms Ru:Mg:Zr=0.1:1:98.9, and the flow rate of HFO-1234(E) was changed to 50mL / min. The results are shown in Table 1.

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Abstract

The present invention discloses an isomerization method for fluorine-containing olefins. According to the invention, in the presence of a catalyst, at least a part of a compound represented by a general formula (I) is converted into a compound represented by a general formula (II), and the composition of the catalyst is shown in the specification. The method provided by the invention has the advantages of high target product selectivity, high catalyst stability and long service life.

Description

technical field [0001] The invention belongs to the field of olefin isomerization, and in particular relates to a method for isomerizing fluorine-containing olefin. Background technique [0002] Fluorine-containing olefin compounds, which contain double bonds in their molecules, have a short lifespan in the atmosphere and have little impact on global warming. They can be used as substitutes for hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs), and can be used as cleaning agents, solvents and Foaming agent, etc. [0003] According to the arrangement of substituents around the double bond in the molecule, fluorine-containing olefin compounds have two configurations, cis isomerism (cis) and trans isomerism (trans). Fluorine-containing olefins with different configurations usually have different physical and chemical properties, so they are used in different fields. Therefore, starting from the application field, it is necessary to obtain a configuration of fluor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/358C07C21/18B01J23/62B01J23/648B01J23/78B01J23/83B01J23/46
CPCC07C17/358B01J23/83B01J23/58B01J23/78B01J23/626B01J23/6482C07B2200/09C07C21/18
Inventor 张迪刘瑶瑶卢朋李伟郭智恺
Owner ZHEJIANG RES INST OF CHEM IND CO LTD
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