Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Core-shell catalyst as well as preparation method and application thereof

A catalyst and core-shell technology, applied in the field of core-shell catalysts and their preparation, can solve the problems of low yield of methyl halide and reduction of selectivity of methyl halide

Active Publication Date: 2018-05-25
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP +1
View PDF6 Cites 3 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Core-shell catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Use aluminum isopropoxide hydrolysis method to prepare aluminum hydroxide slurry: mix water and aluminum isopropoxide at a molar ratio of 120:1, control the hydrolysis temperature at 80℃-85℃, and hydrolyze the aluminum isopropoxide for 1.5 hours before aging The aging temperature is controlled at 90℃-95℃, the aging time is 18h, and an aluminum hydroxide slurry with a solid content of 21.3wt% is obtained.

[0024] Preparation of zinc-loaded composite metal oxide NdCoO with perovskite structure 3-y :Immerse zinc nitrate solution in NdCoO3-y by the equal volume dipping method, and then dry and roast after immersion. The drying time is 2h and the drying temperature is 130°C; the roasting time is 4h and the temperature is 400°C. Composite metal oxide NdCoO with perovskite structure 3-y Spherical, zinc-loaded composite metal oxide NdCoO with perovskite structure 3-y The equivalent diameter is 2mm;

[0025] Spray dipping process: mix an appropriate amount of zirconium sulfate solid...

Embodiment 2

[0029] Use aluminum isopropoxide hydrolysis method to prepare aluminum hydroxide slurry: mix water and aluminum isopropoxide at a molar ratio of 120:1, control the hydrolysis temperature at 80℃-85℃, and hydrolyze the aluminum isopropoxide for 1.5 hours before aging The aging temperature is controlled at 90℃-95℃, the aging time is 18h, and an aluminum hydroxide slurry with a solid content of 21.3wt% is obtained.

[0030] Preparation of zinc-loaded composite metal oxide NdCoO with perovskite structure 3-y :Using equal volume impregnation method in NdCoO 3-y Dipping in zinc sulfate solution, drying and roasting after soaking, the drying time is 3h, the drying temperature is 120°C; the roasting time is 5h, the temperature is 450°C, the zinc-loaded composite metal with perovskite structure is oxidized NdCoO 3-y Spherical, zinc-loaded composite metal oxide NdCoO with perovskite structure 3-y The equivalent diameter is 2mm;

[0031] Spray dipping process: mix an appropriate amount of zirc...

Embodiment 3

[0035] Use aluminum isopropoxide hydrolysis method to prepare aluminum hydroxide slurry: mix water and aluminum isopropoxide at a molar ratio of 120:1, control the hydrolysis temperature at 80℃-85℃, and hydrolyze the aluminum isopropoxide for 1.5 hours before aging The aging temperature is controlled at 90℃-95℃, the aging time is 18h, and an aluminum hydroxide slurry with a solid content of 21.3wt% is obtained.

[0036] Preparation of zinc-loaded composite metal oxide NdCoO with perovskite structure 3-y :Using equal volume impregnation method in NdCoO 3-y Dipped in zinc bromide solution, dried and roasted after soaking. 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-loaded composite with perovskite structure Metal oxide NdCoO 3-y Spherical, zinc-loaded composite metal oxide NdCoO with perovskite structure 3-y The equivalent diameter is 3mm;

[0037] Spray dipping process: mix an appropriate amount of zirconi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a core-shell catalyst as well as a preparation method and an application thereof. The core is Zn supported mixed metal oxide NdCoO(3-y) with a perovskite structure, y is oxygenvacancy, and the shell is aluminium oxide containing zirconium sulfate solid acid, wherein the weight ratio of Zn supported mixed metal oxide NdCoO(3-y) with the perovskite structure to aluminium oxide containing zirconium sulfate solid acid is 10:1-2:1; based on the weight of aluminium oxide containing zirconium sulfate solid acid as the baseline, the weight content of zirconium sulfate solid acid is 5%-10%; based on the weight of Zn supported mixed metal oxide NdCoO(3-y) with the perovskite structure as the baseline, the content of Zn in terms of oxide is 5wt%-30wt%. With adoption of the catalyst, methane conversion rate can be increased while selectivity of the target product halomethane can be improved, deep oxidation of halomethane is inhibited, and yield of halomethane is increasedobviously.

Description

Technical field [0001] The invention relates to a core-shell catalyst and a preparation method and application thereof, in particular to a low-temperature, high-activity, selective core-shell catalyst, and a preparation method and application thereof. Background technique [0002] Methane does not directly react with halogens but uses HCl, HBr or metal halides as halogen sources. The process of reacting to generate halogenated methane with the participation of oxygen is called halogenation reaction. This method was first used in the industrial production of HCl catalytic oxidation to produce chlorine, which is called the Deacon process. [0003] Early methane halogenation 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 The oxychlorinati...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J27/053C07C17/154C07C19/03
CPCB01J27/053C07C17/154C07C19/03
Inventor 李杰张信伟尹泽群刘全杰倪向前
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com