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Preparation method of low-sodium copper-based dehydrogenation catalyst

A technology for dehydrogenation catalysts and copper-based catalysts, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Low, side effects and other issues

Active Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that Na + It is easy to segregate on the catalyst surface, cover the active center, and block the pores at the same time. In addition, too high Na + prone to side effects
[0003] Using conventional washing methods, the bulk sodium content of the catalyst cannot be reduced to a low level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] According to the formula and process of cyclohexanol dehydrogenation catalyst, the ternary matrix of copper-based dehydrogenation catalyst obtained by using sodium carbonate as the precipitating agent of the matrix is ​​filtered and dried, and then granulated. After 120 minutes, the particles after primary calcination were washed five times with 80°C deionized water, and the sodium content of the catalyst body was tested. After passing the test, the washed and filtered particles were dried, and the particles were calcined for a second time at 350°C for 30 minutes, and the catalyst Cat1- a.

Embodiment 2

[0013] According to the formula and process of cyclohexanol dehydrogenation catalyst, the ternary matrix of copper-based dehydrogenation catalyst obtained by using sodium bicarbonate as the precipitant of the matrix is ​​filtered and dried, and then granulated. The particles are first calcined at 350°C in the calciner. After the initial calcination, the particles were washed five times with deionized water at 50°C for 30 minutes, and the sodium content of the catalyst body was tested. After passing the test, the washed and filtered particles were dried, and the particles were calcined for a second time at 300°C for 120 minutes, and the catalyst Cat2 was formed. -a.

Embodiment 3

[0017] According to the formula and process of cyclohexanol dehydrogenation catalyst, the ternary matrix of copper-based dehydrogenation catalyst obtained by using sodium carbonate and sodium hydroxide as the precipitating agent of the matrix is ​​filtered and dried, and then granulated. , the calcination time is 90min, and then the particles after the initial calcination are washed five times with 65°C deionized water, and the sodium content of the catalyst body is tested. The catalyst Cat3-a was obtained.

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PUM

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Abstract

The invention relates to a preparation method of a low-sodium copper-based dehydrogenation catalyst. The preparation method comprises the steps of treating a copper zinc aluminum catalyst ternary matrix to obtain catalyst particles, wherein the copper zinc aluminum catalyst ternary matrix is prepared by taking one or more sodium-containing alkalis (such as sodium hydrogen carbonate, sodium hydroxide or sodium carbonate) as a matrix precipitating agent; calcining the particles in a calcining furnace for the first time; washing the particles, which are calcined for the first time, by using deionized water for at least one time until the sodium content of the catalyst is less than or equal to 200 ppm (based on Na2O); after washing and filtering, drying the particles, calcining the particles for the second time and forming to prepare the required catalyst. The catalyst is applicable to the field of dehydrogenation.

Description

technical field [0001] The invention discloses a method for preparing a copper-based dehydrogenation catalyst with reduced sodium content, belonging to the technical field of catalysts. Background technique [0002] Copper-based dehydrogenation catalysts are widely used in petrochemical and fertilizer industries, such as the dehydrogenation reaction of cyclohexanol. Copper-based dehydrogenation catalysts can be used in many dehydrogenation fields, and the reaction can be exothermic or endothermic. Among them, copper and zinc oxides in the catalyst are called the active matrix, and alumina is the carrier. There are currently two types of preparation methods for copper-based dehydrogenation catalysts, one is the co-precipitation method of nitrate plus alkali, and the other is the ammonia complex method. In the co-precipitation method of nitrate plus alkali, one or several sodium-containing alkalis (such as sodium bicarbonate, sodium hydroxide or sodium carbonate, etc.) are ge...

Claims

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Application Information

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IPC IPC(8): B01J37/06B01J23/80
Inventor 陈海波王琼毛春鹏仇冬殷惠琴于杨贺健曹建平
Owner CHINA PETROLEUM & CHEM CORP