A kind of copper zirconium catalyst, preparation method and application

A copper-zirconium catalyst and copper-zirconium technology, which are applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of improper control of catalyst active precursors, difficulty in washing and filtering catalyst precursors, etc. Solve the difficulty of washing and filtration, good industrial value, and improve the effect of reaction performance

Active Publication Date: 2016-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] In order to solve the problems existing in the prior art such as improper control of catalyst active precursors and difficulty in washing and filtering catalyst precursors, the present invention provides a copper-zirconium catalyst, preparation method and application

Method used

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  • A kind of copper zirconium catalyst, preparation method and application

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Effect test

Embodiment 1

[0054] Configure 5 cubic meters of total salt molar concentration as a mixed solution of nitric acid and zirconium oxychloride (according to CuO / ZrO in the catalyst) 2 The weight ratio is 30 / 70) and 5 cubic meters of 2.0mol / L sodium carbonate solution are added to the high-gravity reactor in parallel flow for neutralization. The neutralization reaction temperature is 80°C, and the rotor speed of the high-gravity reactor is 2000rpm , The residence time of the material in the reactor is 2 minutes, and the pH value of the blue slurry coming out of the supergravity reactor is 8.5. The feed liquid from the high-gravity rotary reactor is aged at 80°C in the aging tank, and the aging is stopped after the feed liquid turns green. The mother liquor was removed by pressure filtration.

[0055] The precursor obtained in the above process was filtered and re-dispersed in water. After the above materials were diluted with deionized water, they were introduced into a hydrothermal stirring ...

Embodiment 2

[0057] Other conditions are with embodiment 1. The rotor speed of the supergravity reactor is 2000rpm, the residence time of the material in the reactor is 0.5 minutes, and the pH value of the slurry coming out of the supergravity reactor is 7.5. The slurry that came out at this time had turned into a green slurry. Na after washing 2 The O content (calculated on a dry base copper-zirconium composite oxide) is 0.048wt%. The prepared catalyst is 2 # . Component content is 30wt%CuO / 70wt%ZrO 2 .

Embodiment 3

[0059] Other conditions are with embodiment 1. The concentration of the composite copper-zirconium mixed salt solution is 5M, the concentration of the sodium carbonate solution is 0.5M, the rotor speed of the supergravity reactor is 100rpm, the residence time of the material in the reactor is 5 minutes, and the pH value of the slurry coming out of the supergravity reactor is 6.5 . The slurry that came out at this time had turned into a green slurry. Na after washing 2 The O content (calculated on a dry base copper-zirconium composite oxide) is 0.042wt%. The prepared catalyst is 3 # . Component content is 15wt%CuO / 85wt%ZrO 2

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Abstract

The invention discloses a preparation method and application of a copper-zirconium catalyst. The copper-zirconium catalyst comprises 5-90wt% of CuO and 5-90wt% of ZrO2 based on100% of the total weight of the catalyst; the catalyst is prepared by virtue of supergravity neutralization, aging and hydrothermal re-aging. As the supergravity-hydrothermal combined preparation method is adopted, a copper catalyst precursor is relatively easy to wash and filter, Na<+> in the catalyst can be removed relatively easily so that the content of Na2O is less than 0.05%, and the activity of the catalyst can be guaranteed.

Description

technical field [0001] The invention relates to the field of removing trace amounts of carbon monoxide, and furthermore, relates to a copper-zirconium catalyst, a preparation method and an application. Background technique [0002] Copper-based catalysts are generally used for the low-temperature deep removal of trace CO catalysts in ethylene or propylene materials. Firstly, the tiny CuO grains have good low-temperature activity. Copper-based catalysts are prepared by the traditional co-precipitation method, and it is difficult to form a uniform grain size whether it is co-current, forward addition or reverse addition. Secondly, in order to obtain smaller CuO grains and larger specific surface area, it is often difficult to achieve washing and filtration, and the Na trapped in the catalyst precursor + must be washed to Na 2 O<0.1wt%, preferably Na 2 O<0.05wt%, if Na + If it cannot be removed effectively, it will greatly affect the activity of the catalyst. Finall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J37/00C07C7/148C07C11/04C07C11/06
CPCY02P20/52
Inventor 王育刘小波乐毅马天石戴伟
Owner CHINA PETROLEUM & CHEM CORP
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