Preparation method of core-shell-type carbon-coated nano-copper catalyst
A carbon-coated and nano-copper technology, which is applied in the preparation of organic compounds, chemical instruments and methods, and catalysts for physical/chemical processes, can solve problems such as easy aggregation of copper nanoparticles, complicated preparation process, and poor catalytic performance. Achieve the effect of high product quality, advanced technology, accurate and detailed data
Active Publication Date: 2015-07-08
TAIYUAN UNIV OF TECH
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Problems solved by technology
For example, CN1721075 and CN102290253A patents are hollow carbon-coated nano-metal catalysts, but the preparation process is complicated, the product purity is low, and the catalytic performance is not good.
[0005] In view of the disadvantage that copper nanoparticles are easy to agglomerate on activated carbon-supported nano-copper catalysts, protecting nano-copper crystals in hollow carbon spheres and constructing a core-shell structure is a new method to solve this problem, but it is still under research.
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[0071] The present invention will be further described below in conjunction with accompanying drawing:
[0072] figure 1 As shown, the state diagram for the preparation of the core-shell carbon-coated nano-copper catalyst by carbonization reduction, the position and connection relationship of each part must be correct, and the ratio should be proportioned and operated in sequence.
[0073] Quantities of chemicals used in preparation are determined in pre-set ranges in grams, milliliters, centimeters 3 is the unit of measurement.
[0074] The preparation of the core-shell carbon-coated nano-copper catalyst is carried out in a tubular high-temperature furnace under heating and nitrogen protection;
[0075] The tubular high-temperature furnace is horizontal, the lower part of the tubular high-temperature furnace 1 is a console 2, and the inner wall of the tubular high-temperature furnace 1 is provided with a resistance heater 3. The middle position of the tubular high-temperatu...
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The invention relates to a preparation method of a core-shell-type carbon-coated nano-copper catalyst. The preparation method solves the problems of dimethyl carbonate synthesis. Through solution preparation, hydro-thermal synthesis and carbide reduction, the core-shell-type carbon-coated nano-copper catalyst is prepared from glucose, copper nitrate, sodium oleate, hexane, anhydrous ethanol, deionized water and nitrogen as raw materials. The preparation method has advanced processes and produces accurate data. The core-shell-type carbon-coated nano-copper catalyst has high quality and good purity of 98.5% and is stable and reliable. The preparation method is an ideal core-shell-type carbon-coated nano-copper catalyst preparation method.
Description
technical field [0001] The invention relates to a preparation method of a core-shell carbon-coated nano-copper catalyst, which belongs to the technical field of catalysts for oxidative carbonylation of methanol to synthesize dimethyl carbonate. Background technique [0002] Methanol is an important chemical substance and energy raw material. Methanol downstream chemicals are a technical field that is being developed competitively at home and abroad. Among them, dimethyl carbonate is a green chemical with good application value. [0003] In the synthesis of dimethyl carbonate, methanol gas-phase oxidative carbonylation method uses methanol, carbon monoxide and oxygen as raw materials, with low production cost and high product selectivity. For example, patents CN102600843A and CN102872879A have reported that activated carbon-supported nano-copper catalysts oxidize carbonyl in methanol gas phase It has extremely high catalytic activity in the synthesis of dimethyl carbonate, bu...
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IPC IPC(8): B01J23/72C07C69/96C07C68/00
Inventor 任军杨雷雷秦志峰王冬蕾郝盼盼林建英
Owner TAIYUAN UNIV OF TECH