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Preparation method of catalyst for methane conversion

A catalyst and methane technology, applied in the field of preparation of methane conversion catalysts, can solve the problems of reducing the selectivity of halogenated methane, low yield of halogenated methane, etc.

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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  • Preparation method of catalyst for methane conversion

Examples

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Embodiment 1

[0023] 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.

[0024] Preparation of zinc-loaded alumina: use equal volume impregnation method on alumina (commercially available, the properties are as follows: L acid content is 0.2mmol g -1 ; BET specific surface is 200; pore volume is 0.3ml / g) impregnated with zinc nitrate solution, dried and roasted after impregnation, the drying time is 2h, and the drying temperature is 130°C; the roasting time is 4h, and the temperature is 400°C , the zinc-loaded alumina is spherical, and the equivalent diameter of the zinc-loaded alumina is 2 mm;

[0025] Spray immersion process: mix appro...

Embodiment 2

[0029] 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.

[0030] Preparation of zinc-loaded alumina: use equal volume impregnation method on alumina (commercially available, L acid content is 0.1mmol g -1 ;BET specific surface is 300m 2 / g; the pore volume is 0.5ml / g) impregnated with zinc sulfate solution, dried and roasted after immersion, the drying time is 3h, and the drying temperature is 120°C; the roasting time is 5h, the temperature is 450°C, the load Zinc alumina is spherical, and the equivalent diameter of zinc-loaded alumina is 2 mm;

[0031] Spray immersion process: mix appropriate amount of zirconium sulfate ...

Embodiment 3

[0035] 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.

[0036] Preparation of zinc-loaded alumina: using an equal volume impregnation method on alumina (commercially available, the properties are as follows: the content of L acid is 0.05 mmol g -1 ;BET specific surface is 250m 2 / g; pore volume is 0.3 ~ 0.6ml / g, preferably 0.4ml / g,) impregnated with zinc bromide solution, dried and roasted after impregnated, the drying time is 4h, and the drying temperature is 100°C; The calcination time is 4 hours, the temperature is 500°C, the zinc-loaded alumina is spherical, and the equivalent diameter of the zinc-loaded alumina is 3...

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Abstract

The invention discloses a preparation method of a catalyst for methane conversion. The method comprises the following steps: zirconium sulfate solid acid, 2-methylimidazole and aluminium hydroxide slurry are mixed, and aluminium hydroxide slurry containing zirconium sulfate solid acid and 2-methylimidazole is obtained; then the aluminium hydroxide slurry containing zirconium sulfate solid acid and2-methylimidazole performs spray soaking on zinc supported alumina, and the catalyst for methane oxyhalogenation conversion is prepared after drying and roasting. The catalyst prepared with the method 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 halomethaneis increased obviously.

Description

technical field [0001] The invention relates to a preparation method of a methane conversion catalyst, in particular to a preparation method of a low-temperature, high-activity and selective methane halide oxidation conversion catalyst with a shell-core structure. 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 2 An ...

Claims

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Application Information

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IPC IPC(8): B01J27/053B01J23/06C07C17/154C07C19/075
CPCB01J23/06B01J27/053C07C17/154C07C19/075
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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