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A method for preparing highly active copper-zirconium catalysts using zirconia ball grinding debris

A copper-zirconium catalyst and zirconia ball technology, which is applied in the field of waste treatment, can solve the problems of large fluctuation of product ratio, poor catalytic activity, small specific surface area, etc., and achieve the effects of strong catalytic activity, stable composition and large specific surface area.

Active Publication Date: 2021-04-13
方嘉城
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages such as large fluctuations in the product ratio obtained, small specific surface area, poor catalytic activity, and high cost.

Method used

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  • A method for preparing highly active copper-zirconium catalysts using zirconia ball grinding debris
  • A method for preparing highly active copper-zirconium catalysts using zirconia ball grinding debris
  • A method for preparing highly active copper-zirconium catalysts using zirconia ball grinding debris

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Experimental program
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Effect test

Embodiment 1

[0034] A method for preparing highly active copper-zirconium catalysts by utilizing zirconia ball grinding debris, comprising the following steps:

[0035] (1) adding sodium hydroxide to the grinding debris of zirconia for roasting, the roasting temperature is 385° C., and the roasting time is 2.5 hours, then take it out, add hot pure water to wash, and obtain sodium zirconate solution through filtration;

[0036] (2) The sodium zirconate obtained in step (1) is fed into carbon dioxide until the pH of the solution is 7.85, filtered and washed, then added with copper acetate solution for slurrying, and the slurryed material is spray-dried to obtain a dry powder;

[0037] (3) Put the dry powder obtained in step (2) into a hydrogen reduction furnace for reduction, the reduction temperature is 458°C, and the reduction time is 1.95 hours, then airflow crushing is carried out under the protection of nitrogen, and after screening and vacuum packaging, A copper-zirconium catalyst is o...

Embodiment 2

[0048] A method for preparing highly active copper-zirconium catalysts by utilizing zirconia ball grinding debris, comprising the following steps:

[0049] (1) adding sodium hydroxide to the grinding debris of zirconia for roasting, the roasting temperature is 395° C., and the roasting time is 2.8 hours, then take it out, add hot pure water for washing, and obtain sodium zirconate solution through filtration;

[0050] (2) The sodium zirconate obtained in step (1) is fed into carbon dioxide until the pH of the solution is 7.85, filtered and washed, then added with copper acetate solution for slurrying, and the slurryed material is spray-dried to obtain a dry powder;

[0051] (3) Put the dry powder obtained in step (2) into a hydrogen reduction furnace for reduction, the reduction temperature is 475°C, and the reduction time is 2.1 hours, then airflow crushing is carried out under the protection of nitrogen, and after screening and vacuum packaging, A copper-zirconium catalyst i...

Embodiment 3

[0062] A method for preparing highly active copper-zirconium catalysts by utilizing zirconia ball grinding debris, comprising the following steps:

[0063] (1) adding sodium hydroxide to the grinding debris of zirconia for roasting, the roasting temperature is 385° C., and the roasting time is 2.7 hours, then take it out, add hot pure water for washing, and obtain sodium zirconate solution through filtration;

[0064] (2) The sodium zirconate obtained in step (1) is fed into carbon dioxide until the pH of the solution is 7.9, washed after filtration, then added with copper acetate solution for slurrying, and the slurryed material is spray-dried to obtain a dry powder;

[0065] (3) Put the dry powder obtained in step (2) into a hydrogen reduction furnace for reduction, the reduction temperature is 435° C., and the reduction time is 2.3 hours, then air crushing is carried out under the protection of nitrogen, and after screening and vacuum packaging, A copper-zirconium catalyst ...

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Abstract

The invention discloses a method for preparing a high-activity copper-zirconium catalyst by using zirconia ball grinding debris. Add the zirconia grinding debris to sodium hydroxide for roasting, the roasting temperature is 385°C, the roasting time is 2.5 hours, then take it out, add hot pure water to wash, and filter to obtain sodium zirconate solution; Sodium zirconate is fed into carbon dioxide until the pH of the solution is 7.85, filtered and washed, then added with copper acetate solution for slurrying, and the slurryed material is spray-dried to obtain a dry powder; the dry powder obtained in step (2) Put it into a hydrogen reduction furnace for reduction, the reduction temperature is 458°C, and the reduction time is 1.95 hours. Then, it is crushed by air flow under the protection of nitrogen, and it is screened and vacuum-packed to obtain a copper-zirconium catalyst. The invention reduces the cost, realizes resource utilization of waste, has stable catalyst components, large specific surface area and strong catalytic activity.

Description

technical field [0001] The invention relates to a method for preparing a high-activity copper-zirconium catalyst by using zirconia ball grinding debris, which belongs to the technical field of waste treatment. Background technique [0002] In the production process of lithium iron phosphate, the material will be ground by sand milling process. Generally, sand mill is used for sand grinding, and zirconia balls are used for sand grinding. Due to the fine grinding particle size, it is generally hundreds of nanometers Below, the wear of zirconia balls is serious, and generally a lot of zirconia grinding debris will be retained. At the same time, because the particle size of zirconia grinding balls is very fine, generally about 1mm, it will be completely worn out after being worn to a certain extent. According to statistics, a manufacturer with an annual output of 1,000 tons of lithium iron phosphate produces about 1 ton of zirconia waste per year. This part of zirconia waste is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J35/02B01J35/10B01J37/00B01J37/06B01J37/08B01J37/18C01D7/07C01D7/24
CPCB01J23/72B01J35/023B01J35/026B01J35/1014B01J37/0045B01J37/06B01J37/08B01J37/18C01D7/07C01D7/24
Inventor 方嘉城
Owner 方嘉城
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