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Method for producing trifluoroacetic acid methyl ester by catalytic oxidation of methane

A technology of methyl trifluoroacetate and methane catalysis, applied in the chemical industry, can solve the problems of less oxygen oxidizing methane and the like, and achieve the effect of improving the yield

Inactive Publication Date: 2011-06-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxygen is a cheap and environmentally friendly oxidant, which is very attractive, but the oxidation of methane with oxygen is still less studied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The concentration and operation process of palladium acetate, benzoquinone, phosphomolybdovanadic acid and the comparative example are exactly the same, wherein the reaction solvent is 10mL trifluoroacetic acid and 2mL perfluorooctane. Subsequent steps are exactly the same as the comparative example. After the reaction was stopped, the concentration of methyl trifluoroacetate was measured to be 3.77 mM.

Embodiment 2

[0014] The concentrations of palladium acetate, benzoquinone, and phosphomolybdovanadic acid are exactly the same as in the comparative example, and the addition amount and operation process of trifluoroacetic acid and perfluorooctane are exactly the same as in Example 1. Introduce 2.5MPa methane and 1.5MPa oxygen, and close the intake valve. Subsequent steps are exactly the same as the comparative example. After the reaction was stopped, the concentration of methyl trifluoroacetate was measured to be 4.54 mM.

Embodiment 3

[0016] The concentration and operation process of palladium acetate, benzoquinone, phosphomolybdovanadic acid and the comparative example are exactly the same, wherein the reaction solvent is 10mL trifluoroacetic acid and 3mL perfluorooctane. Subsequent steps are exactly the same as the comparative example. After the reaction was stopped, the concentration of methyl trifluoroacetate was measured to be 10.66 mM.

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PUM

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Abstract

The invention provides a method for producing trifluoroacetic acid methyl ester by catalytic oxidation of methane, belonging to the technical field of chemical industry. The method is characterized in that in a mixing solvent composed of perfluoroctane or perfluornonane and trifluoroacetic acid, methane is subjected to catalytic oxidation to obtain the trifluoroacetic acid methyl ester by taking oxygen as oxidant and using palladium acetate, benzoquinone and phospho vando molybdic acid as catalysts. In the method, the volume ratio of perfluoroctane or perfluornonane to trifluoroacetic acid is1:1 to 1:10; the total pressure of methane and oxygen is 2.0-5.0 MPa, and the partial pressure ratio of methane to oxygen (1.6-10):1; and reaction is carried out for 1-12 hours at the temperature of 40-120 DEG C to produce the trifluoroacetic acid methyl ester. Compared with the method using single solvent trifluoroacetic acid, the method provided by the invention has the advantage of obviously improved yield of trifluoroacetic acid methyl ester.

Description

technical field [0001] The invention relates to a method for producing methyl trifluoroacetate by catalytic oxidation of methane, which belongs to the technical field of chemical industry. Background technique [0002] With the increasing shortage of oil resources, the further development and utilization of natural gas resources has attracted more and more attention. The main component of natural gas is methane, and the comprehensive utilization of methane can be divided into two categories: direct conversion method and indirect conversion method. The direct conversion method is to convert methane directly into liquid products such as acids, aldehydes, and alcohols. At present, the production process is mostly indirect conversion method, that is, the method of steam cracking is used to produce synthesis gas (CO+H 2 ), and then produce liquid products such as acids, aldehydes, alcohols, etc. from the synthesis gas through Fischer-Tropsch synthesis. However, the process of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/63C07C67/035
Inventor 元炯亮王兰兰王艳
Owner BEIJING UNIV OF CHEM TECH
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