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Foam silicon carbide based structured catalyst and application in preparation of butadiene

A structured catalyst, foamed silicon carbide-based technology, applied in physical/chemical process catalysts, catalyst carriers, hydrocarbons, etc., can solve the problems of energy consumption, high material consumption, catalyst wear and separation, and many side reaction products, etc. Achieve the effect of reducing energy consumption, small bed resistance and increasing productivity

Active Publication Date: 2014-08-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a foamed silicon carbide-based structured catalyst and its application in the production of butadiene by oxidative dehydrogenation of butene, so as to solve the problems of energy consumption and material consumption in the existing butadiene production technology by oxidative dehydrogenation of butene. High, many side reaction products, and problems such as catalyst wear and separation

Method used

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  • Foam silicon carbide based structured catalyst and application in preparation of butadiene
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  • Foam silicon carbide based structured catalyst and application in preparation of butadiene

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Embodiment 1

[0030] As shown in Figure 1(a)-Figure 1(b), the catalyst of this embodiment uses foamed silicon carbide whose surface has been modified with aluminum oxide as the carrier, the loading of aluminum oxide is 20wt%, and the pore volume fraction of the foamed silicon carbide (Porosity) 80%, pore size 0.8mm.

[0031] Weigh 20.0 grams of Zn(NO 3 ) 2 ·6H 2 O, 35 g Fe(NO 3 ) 2 ·6H 2 O and 5 grams of Co(NO 3 ) 2 ·6H 2 O, dissolve in a certain amount of water to make 100 ml solution, then add 28.0 g of citric acid, heat and stir to dissolve. Add 100ml of the foamed silicon carbide carrier to the above solution, soak for half an hour, take it out and dry, and activate it at 600°C for 1 hour to prepare a butadiene foamed silicon carbide-based structured catalyst by oxidative dehydrogenation of butene. Among them, the active component of the catalyst accounts for 15% of the mass fraction of the whole structured catalyst, the main active component is zinc cobalt ferrite, which accounts for 65% ...

Embodiment 2

[0034] The catalyst in this embodiment uses foamed silicon carbide whose surface has been modified with nano silicon carbide as a carrier, the loading amount of nano silicon carbide is 30 wt%, the volume fraction of foam silicon carbide pores is 80%, and the pore size is 0.5 mm.

[0035] Weigh 20.0 grams of Zn(NO 3 ) 2 ·6H 2 O, 35 g Fe(NO 3 ) 2 ·6H 2 O was dissolved in a certain amount of water to make a 100 ml solution, and then 23.0 g of citric acid was added and heated and stirred to dissolve. Add 100ml of the foamed silicon carbide carrier to the above solution, soak for half an hour, take it out and dry it, and activate it at 500°C for 2 hours to prepare a butadiene foamed silicon carbide-based structured catalyst by oxidative dehydrogenation of butene. Among them, the active component of the catalyst accounts for 25% of the mass fraction of the whole structured catalyst, the main active component is zinc ferrite, which accounts for 60% of the mass fraction of the whole activ...

Embodiment 3

[0038] The catalyst in this embodiment uses foamed silicon carbide whose surface is modified with titanium oxide as a carrier, the loading amount of titanium oxide is 30 wt%, the volume fraction of foamed silicon carbide is 75%, and the pore diameter is 0.5 mm.

[0039] Weigh 20.0 grams of Zn(NO 3 ) 2 ·6H 2 O, 35 g Fe(NO 3 ) 2 ·6H 2 O and 5 grams of Cr(NO 3 ) 2 ·6H 2 O. Dissolve in a certain amount of water to make 100 ml solution, then add 25.0 g of citric acid, heat and stir to dissolve. Add 100ml of the foamed silicon carbide carrier to the above solution, soak for half an hour, take it out and dry it, and activate it at 500°C for 2 hours to prepare a butadiene foamed silicon carbide-based structured catalyst by oxidative dehydrogenation of butene. Among them, the catalyst active component accounts for 21% of the mass fraction of the whole structured catalyst, the main active component is zinc iron chromate, which accounts for 60% of the mass fraction of the whole active compon...

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Abstract

The invention relates to the catalyst field, particularly to a foam silicon carbide based structured catalyst and its application in preparation of butadiene by oxidative dehydrogenation of butylene. The foam silicon carbide based structured catalyst is the catalyst for preparation of butadiene by oxidative dehydrogenation of butylenes, and takes foam silicon carbide with a three-dimensional interconnected pore structure as the carrier. A ferrite catalyst with a spinel structure is loaded on the carrier surface as the main active component, and one or over two of alpha-Fe2O3, gamma-Fe2O3 and Fe3O4 are loaded on the carrier surface as the secondary active components, thus forming the structured catalyst. The structured catalyst can be processed into a plurality of complex configurations like wall flow type, parallel channel type, static hybrid type, granules and the like. The foam silicon carbide based structured catalyst provided by the invention can convert butylene into butadiene through oxidative dehydrogenation, thus reinforcing heat transfer and mass transfer, improving butadiene yield, prolonging the catalyst life, and reducing the energy consumption and material consumption of the reaction process.

Description

Technical field [0001] The invention relates to the field of catalysts, in particular to a foamed silicon carbide-based structured catalyst and its application in the oxidative dehydrogenation of butene to butadiene. Background technique [0002] With the goal of energy saving, consumption reduction, environmental protection, and intensification, the chemical process enhancement technology by means of unit operation equipment enhancement, production process enhancement and information technology enhancement is a major goal for the chemical industry to achieve the goal of "energy saving and green processes, efficient and clean production" Key technology. Among them, the chemical reaction process enhancement technology that can achieve the goals of energy saving, consumption reduction, and cleaner production in the chemical industry from the source is a core technology for chemical process enhancement. [0003] Heterogeneous catalytic reactions with significant thermal effects are w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224B01J32/00B01J35/10C07C11/167C07C5/48
Inventor 张劲松杨振明矫义来田冲曹小明高勇杨晓丹
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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