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High-stability Cu-based catalyst and preparation method thereof

A high-stability, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as poor catalyst stability and environmental pollution, and achieve reduction Effects of acidity, increased reduction temperature, and enhanced interaction force

Inactive Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that the copper-based catalyst prepared by the prior art is applied to α, α-dimethylbenzyl alcohol hydrogenolysis to produce cumene, the catalyst stability is poor, and the problem of environmental pollution caused by the use of Cr element , providing a new highly stable Cu-based catalyst

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  • High-stability Cu-based catalyst and preparation method thereof
  • High-stability Cu-based catalyst and preparation method thereof

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Embodiment 1

[0014] Catalyst 1 uses an appropriate amount of Mg(NO 3 ) 2 The solution was impregnated with equal volume, dried and calcined at 600 °C to obtain MgO-modified Al 2 o 3 Carrier, after pulverizing the carrier, mix it with water and beating to obtain slurry I, drop the required amount of mixed solution of copper nitrate, zinc nitrate and manganese nitrate and 1.0mol / L sodium carbonate aqueous solution into slurry I at the same time for co-precipitation to form slurry II. The precipitation temperature is 70°C, and the pH value of the solution is controlled to be 8.0. After the solution is added dropwise, it is aged at 70°C for 4 hours, then the precipitate is washed and filtered, dried at 120°C for 12 hours, calcined at 350°C for 4 hours, and pressed into tablets Forming obtains catalyst 1 (the composition of catalyst is by weight percent: 30%CuO-31%ZnO%-28%Al 2 o 3 -5%MgO-6%MnOx) Embodiment 2~15 (corresponding catalyst 2~15), prepare catalyst according to each step among the...

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Abstract

The invention relates to a high-stability copper-based catalyst for hydrogenolysis reaction and a preparation method thereof, mainly solving the problems that the conventional Cu-based catalyst is low in stability and causes heavy pollution. The high-stability Cu-based catalyst comprises the following components in percentage by weight: (a) 15.0-45.0 percent of CuO, (b) 15.0-45.0 percent of ZnO, (c) 2-25 percent of MnOx, (d) 15.0-55.0 percent of Al2O3, and (e) 2.0-20.0 percent of at least one of MgO, CaO and BaO. By the technical field of the preparation method disclosed by the invention, the problems are solved well; and the high-stability Cu-based catalyst and the preparation method thereof can be applied to the industrial production of preparing isopropylbenzene by performing hydrogenolysis on alpha, alpha-dimethyl benzyl alcohol.

Description

technical field [0001] The invention relates to a highly stable copper catalyst and its preparation. Background technique [0002] Cu-based catalysts are widely used in methanol synthesis, CO low-temperature shift, hydrogenation reaction, methanol reforming to hydrogen production, NO decomposition, catalytic oxidation and other reactions. Most of these catalysts are prepared by co-precipitation method, with Cu 2+ , Zn 2+ 、Al 3+ ions as precursors, Na 2 CO 3 , NaOH, and urea are precipitants, and the preparation conditions have a great influence on the performance of the catalyst. The phase composition of the catalyst precursor is a key factor affecting the catalytic performance. Studies by Millar et al. showed that in the precursor (Zn, Cu) 5 (CO 3 ) 2 (OH) 6 The phase of matter is the main phase of generating highly active catalysts; Pollard et al. studied the phase change process of wet materials in mother liquor, and believed that the reaction first produced amor...

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Application Information

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IPC IPC(8): B01J23/889C07C15/085C07C1/20
CPCY02P20/52
Inventor 王辉刘仲能马静萌王德举汪哲明
Owner CHINA PETROLEUM & CHEM CORP
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