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Heterogeneous catalyst, preparation method of heterogeneous catalyst and application of heterogeneous catalyst

A heterogeneous catalyst, catalyst technology, applied in oxidation reaction preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of long process cycle, unsatisfactory metal dispersion, cumbersome synthesis process, etc. The selectivity, preparation and processing operations are simple and easy, and the effect of high-efficiency transformation

Active Publication Date: 2013-02-13
中科西卡思(苏州)科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-step method of loading transition metals is not only cumbersome in the synthesis process, but also has a long process cycle, and the dispersion of the loaded metals is not ideal, which usually leads to the appearance of some metal oxide aggregates

Method used

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  • Heterogeneous catalyst, preparation method of heterogeneous catalyst and application of heterogeneous catalyst
  • Heterogeneous catalyst, preparation method of heterogeneous catalyst and application of heterogeneous catalyst
  • Heterogeneous catalyst, preparation method of heterogeneous catalyst and application of heterogeneous catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 0.009moL tetrapropylammonium hydroxide (TPAOH), 0.001mol triisopropoxyaluminum (Al( i PrO) 3 ) and 0.05molL tetraethyl orthosilicate (TEOS) and 0.003mol copper nitrate were added to 90mL water, stirred at a temperature lower than 15°C until the copper nitrate was completely dissolved, then aged at 5°C for 24 hours, and then the mixed aqueous solution was added to into 60 mL of surfactant cetyltrimethylammonium bromide (CTAB) aqueous solution with a concentration of 0.004 mol / L, stirred vigorously at 10°C for 3 hours, and aged at room temperature for 4 hours, and then the formed condensate Put the glue into a polytetrafluoroethylene hydrothermal kettle, carry out hydrothermal crystallization reaction at 150°C for 24 hours, centrifuge, wash the sample, dry at 100°C overnight, and finally roast at 550°C for 8 hours to remove inorganic salts and organic matter, and obtain The hierarchically porous zeolite material (Si / Al=50, Cu / Al=3) doped with Cu ions, that is, the hetero...

Embodiment 2

[0044] The difference between this embodiment and embodiment 1 is only that the molar amount of copper nitrate is 0.001 mol, and other contents are the same as those described in embodiment 1.

[0045] It was detected that the transition metal ions in the heterogeneous catalyst Cu(1)-MZ (Si / Al=50, Cu / Al=1) prepared in this example were basically loaded into the framework of the zeolite.

Embodiment 3

[0047] The difference between this embodiment and embodiment 1 is that the molar amount of copper nitrate is 0.002 mol, and other contents are the same as those described in embodiment 1.

[0048] It was detected that the transition metal ions in the heterogeneous catalyst Cu(2)-MZ (Si / Al=50, Cu / Al=2) prepared in this example were basically loaded into the framework of the zeolite.

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Abstract

The invention discloses a heterogeneous catalyst, a preparation method of the heterogeneous catalyst and application of the heterogeneous catalyst. The heterogeneous catalyst is a multi-stage hole zeolite material doped with transition metal ions which are located at a frame position of the multi-stage hole zeolite. The preparation method of the heterogeneous catalyst comprises adopting a one-step in-situ doping method or an ion exchange method to dope the transition metal ions in the multi-stage hole zeolite. A test proves that the heterogeneous catalyst can achieve selective oxidation for catalyzing cyclohexane in a catalysis environment, can be efficiently converted and has high selectivity of a target product. In addition, the heterogeneous catalyst has good stability, can be utilized in a circulated mode, is simple and easy in preparation and treatment operation and has important meanings and values on efficiently producing chemical products including cyclohexyl ethyl alcohol and cyclohexanone.

Description

technical field [0001] The invention relates to a heterogeneous catalyst and its preparation method and application, belonging to the technical field of catalytic materials. Background technique [0002] In industrial production, the selective oxidation of organic compounds containing C-H functional groups is an important and very difficult reaction. For example, the selective oxidation of cyclohexane is one of the important catalytic reactions. The cyclohexanol and cyclohexanol it produces Hexanone is an important chemical product, which can be used to produce nylon 6 and nylon 66. In traditional industrial catalytic reactions, the oxidation of cyclohexane is usually carried out in a high temperature and high pressure environment, and the oxidant used is generally pressurized oxygen. The conversion rate of cyclohexane can be improved by prolonging the catalytic reaction time, but the selectivity of the product will be greatly reduced; therefore, in order to obtain a high s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01J29/46C07C27/16C07C35/08C07C29/48C07C49/403C07C45/28
Inventor 周晓霞陈航榕施剑林
Owner 中科西卡思(苏州)科技发展有限公司
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