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Silver catalyst bed, application thereof and method for preparing aldehyde through alcohol oxidation

A silver catalyst, alcohol oxidation technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of large loss, short regeneration period and low silver catalyst activity And other issues

Active Publication Date: 2021-04-06
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a silver catalyst bed and its application and a method for producing aldehyde by oxidation of alcohol in order to overcome the problems of low silver catalyst activity, large loss and short regeneration cycle in the prior art

Method used

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  • Silver catalyst bed, application thereof and method for preparing aldehyde through alcohol oxidation

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Embodiment approach

[0042] According to a preferred embodiment of the present invention, a copper backing net is arranged below the silver catalyst bed at the bottom of the silver catalyst bed, and the copper backing net is stacked sequentially from bottom to top. The number of meshes increases sequentially from bottom to top.

[0043] According to a specific embodiment of the present invention, the copper backing mesh is stacked sequentially with three copper meshes with specifications of 2 mesh (lower layer), 5 mesh (middle layer), and 50 mesh (upper layer).

[0044] The second aspect of the present invention provides an application of the above-mentioned silver catalyst bed in the reaction of alcohol oxidation to aldehyde.

[0045] The third aspect of the present invention provides a method for producing aldehydes by oxidation of alcohols, the method comprising: under alcohol oxidation conditions, contacting alcohols and oxidants with the above-mentioned silver catalyst bed, wherein the stream...

Embodiment 1

[0061] It is known that the total amount X of the silver catalyst is 100kg, the total mesh number of the silver catalyst Y∈[10,60], the number of silver catalyst beds Z is 2, the number R of the copper backing mesh is 3, and the copper backing mesh The mesh number W is 2 / 5 / 50 mesh.

[0062] Silver catalyst bed S1 comprises two silver catalyst beds, described silver catalyst bed is arranged in parallel successively from bottom to top, is filled with silver catalyst in the described silver catalyst bed, with the total amount of the silver catalyst of loading in silver catalyst bed as Benchmark, from bottom to top, in the two silver catalyst beds, the loading masses of silver catalysts are 70kg and 30kg respectively, and the mesh numbers of silver catalysts are 10-30 mesh and 40-60 mesh respectively. Three copper backing nets are arranged below the bottom silver catalyst bed of the silver catalyst bed, and the copper backing nets are stacked sequentially from bottom to top, and t...

Embodiment 2

[0064] It is known that the total amount X of the silver catalyst is 100kg, the total mesh number of the silver catalyst Y∈[10,60], the number of silver catalyst beds Z is 4, the number R of the copper backing mesh is 3, and the copper backing mesh The mesh number W is 2 / 5 / 50 mesh.

[0065] Silver catalyst bed S2 comprises four silver catalyst beds, described silver catalyst bed is arranged in parallel successively from bottom to top, is filled with silver catalyst in the described silver catalyst bed, with the total amount of the silver catalyst of loading in silver catalyst bed is Benchmark, from bottom to top, in the four silver catalyst beds, the loading quality of silver catalyst is 60kg, 20kg, 15kg, 5kg respectively, and the mesh numbers of silver catalyst are 10-15 mesh, 15-30 mesh, 30-40 mesh respectively , 40-60 mesh. Three copper backing nets are arranged below the bottom silver catalyst bed of the silver catalyst bed, and the copper backing nets are stacked sequent...

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Abstract

The invention relates to the technical field of catalysts, and discloses a silver catalyst bed, application thereof and a method for preparing aldehyde through alcohol oxidation. The silver catalyst bed comprises at least two silver catalyst bed layers, the silver catalyst bed layers are sequentially arranged in parallel from bottom to top, the silver catalyst bed layers are filled with silver catalysts, and every two adjacent silver catalyst bed layers are arranged in parallel from bottom to top. The particle size of the silver catalyst filled in the upper silver catalyst bed layer is smaller than the particle size of the silver catalyst filled in the lower silver catalyst bed layer; and the filling mass of the silver catalyst in the silver catalyst bed layer arranged at the upper part is smaller than that of the silver catalyst in the silver catalyst bed layer arranged at the lower part. When the silver catalyst bed provided by the invention is applied to the reaction for preparing aldehyde through alcohol oxidation, the activity of the silver catalyst can be effectively improved, and the shutdown frequency and the silver catalyst activity reduction frequency are reduced.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a silver catalyst bed and its application, and a method for producing aldehydes by oxidation of alcohols. Background technique [0002] Pure silver catalyst is a block or granular catalyst with uneven mesh, mainly used for oxidative dehydrogenation of methanol to formaldehyde and oxidative dehydrogenation of ethanol to acetaldehyde. In the chemical production process, a catalytic bed is usually set up in the reactor, and the silver catalyst is spread on the bed, and the reactants are catalyzed by the catalytic bed to undergo a chemical reaction when they pass through the catalytic bed. Pure silver catalysts are generally taken out after a period of use (referred to as the regeneration cycle), and the surface oxides are reduced (activated regeneration), and the regenerated pure silver catalysts are spread back to the bed to continue to participate in the production reaction. Si...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J35/02C07C45/37C07C45/38C07C47/04C07C47/06
CPCB01J23/50C07C45/37C07C45/38B01J35/40C07C47/04C07C47/06Y02P20/584
Inventor 李军林晓燕杨玮婧乃国星杨军赵立军王启陈星高勇吴钢铁洪吉俊陈海华何建国金政伟袁炜李磊黄河申宏鹏姜慧婧杜振威方伟王芳马金欣张得栋刘艳丽
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD