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Catalyst for methane conversion as well as preparation method and application of catalyst

A catalyst and methane technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, preparation of halogenated hydrocarbons, etc., can solve the problems of reducing the selectivity of methyl halides and low yields of methyl halides, so as to improve selectivity , Improve the conversion rate of methane and prevent oxidation

Active Publication Date: 2018-05-25
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The methane halogen oxidation reaction in the prior art has the following technical problems. High temperature is beneficial to improve the conversion rate of methane, but it will cause deep oxidation of the generated methyl halides, especially monohalomethanes, to generate CO or CO 2 , which significantly reduces the selectivity of methyl halides, resulting in low yields of methyl halides. Therefore, it is of great significance to develop a catalyst for the methane halooxidation reaction with high methane conversion and selectivity of methyl halides.

Method used

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  • Catalyst for methane conversion as well as preparation method and application of catalyst
  • Catalyst for methane conversion as well as preparation method and application of catalyst

Examples

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Embodiment 1

[0024] Prepare aluminum hydroxide slurry by hydrolysis of aluminum isopropoxide: mix water and aluminum isopropoxide at a molar ratio of 120:1, control the hydrolysis temperature at 80°C-85°C, hydrolyze aluminum isopropoxide for 1.5h, and then carry out aging , the aging temperature was controlled at 90°C-95°C, the aging time was 18h, and an aluminum hydroxide slurry with a solid content of 21.3wt% was obtained.

[0025] Prepare silicon oxide containing zinc and cobalt, denoted as A: use equal volume impregnation method on silicon oxide (commercially available, the properties are as follows: specific surface 335m 2 / g, pore volume is 0.86ml / g) impregnated with zinc nitrate and cobalt nitrate solution, dried and roasted after impregnation, the drying time is 2h, and the drying temperature is 130°C; the roasting time is 4h, the temperature is 400°C, The silicon oxide containing zinc and cobalt is spherical, and the equivalent diameter of silicon oxide containing zinc and cobalt ...

Embodiment 2

[0030] Prepare aluminum hydroxide slurry by hydrolysis of aluminum isopropoxide: mix water and aluminum isopropoxide at a molar ratio of 120:1, control the hydrolysis temperature at 80°C-85°C, hydrolyze aluminum isopropoxide for 1.5h, and then carry out aging , the aging temperature was controlled at 90°C-95°C, the aging time was 18h, and an aluminum hydroxide slurry with a solid content of 21.3wt% was obtained.

[0031] Preparation of silicon oxide containing zinc and manganese, denoted as A: using equal volume impregnation method on silicon oxide (commercially available, the properties are as follows: specific surface 335m 2 / g, pore volume is 0.86ml / g) impregnated with zinc sulfate, manganese nitrate solution, dried and roasted after impregnated, the drying time is 3h, and the drying temperature is 120°C; the roasting time is 5h, the temperature is 450°C, Described zinc-containing, manganese-containing silicon oxide is spherical, and the equivalent diameter is 2mm, and desc...

Embodiment 3

[0036] Prepare aluminum hydroxide slurry by hydrolysis of aluminum isopropoxide: mix water and aluminum isopropoxide at a molar ratio of 120:1, control the hydrolysis temperature at 80°C-85°C, hydrolyze aluminum isopropoxide for 1.5h, and then carry out aging , the aging temperature was controlled at 90°C-95°C, the aging time was 18h, and an aluminum hydroxide slurry with a solid content of 21.3wt% was obtained.

[0037] Preparation of silicon oxide containing zinc and cerium, denoted as A: using equal volume impregnation method on silicon oxide (commercially available, the properties are as follows: specific surface 335m 2 / g, pore volume is 0.86ml / g) impregnated with zinc bromide, cerium nitrate solution, dried and roasted after impregnation, the drying time is 4h, and the drying temperature is 100°C; the roasting time is 4h, and the temperature is 500°C , the zinc-containing, cerium-containing silicon oxide is spherical, and the equivalent diameter is 3mm; the composition i...

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Abstract

The invention discloses a catalyst for methane conversion as well as a preparation method and an application of the catalyst. Zinc is taken as an active component of the catalyst, one or more of cobalt, manganese and cerium is / are taken as auxiliaries, and silicon oxide is taken as a support; in terms of weight content of the final catalyst, the content of the active component in terms of oxide is5wt%-30wt%, and preferably 10wt%-25wt%; the content of the auxiliaries in terms of oxide is 1wt%-8wt%, and preferably 3wt%-5wt%. The catalyst has the advantages that methane conversion rate and selectivity of halomethane as a target product are increased simultaneously, deep oxidation of halomethane is inhibited, and yield of halomethane is increased obviously.

Description

technical field [0001] The invention relates to a methane conversion catalyst and its preparation method and application, in particular to a low-temperature, high-activity, selective methane halogen oxidation conversion catalyst, its preparation method and application. Background technique [0002] Methane does not directly react with halogen, but uses HCl, HBr or metal halide as a halogen source, and the process of reacting with the participation of oxygen to form halide is called halogen oxidation reaction. This method was first applied to the industrial production of chlorine by catalytic oxidation of HCl, known as the Deacon process. [0003] The early methane halogen oxidation reaction mainly used HCl as the halogen source, and the catalyst mainly used CuCl 2 As the active component, Bromhead et al. (Bromhead J, Font-Freide J J, Westlake D J. Process for the production of methyl or ethyl mono-chloride or bromide. EP. Patent, 0117731.1984-09-05) loaded CuCl on alumina ...

Claims

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Application Information

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IPC IPC(8): B01J27/053C07C17/154C07C19/03C07C19/075
CPCB01J27/053C07C17/154C07C19/03C07C19/075
Inventor 李杰张信伟尹泽群刘全杰倪向前
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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