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A kind of foamed silicon carbide-based structured catalyst and its application in the preparation of butadiene

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

Active Publication Date: 2016-08-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of foamed silicon carbide-based structured catalyst and its application in the preparation of butadiene
  • A kind of foamed silicon carbide-based structured catalyst and its application in the preparation of butadiene
  • A kind of foamed silicon carbide-based structured catalyst and its application in the preparation of butadiene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] As shown in Figure 1(a)-Figure 1(b), the catalyst in this example uses silicon carbide foam with the surface modified by Al2O3 as the carrier, the loading of Al2O3 is 20wt%, and the pore volume fraction of the silicon carbide foam is (Porosity) 80%, pore diameter 0.8mm.

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

Embodiment 2

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

[0035] Weigh 20.0 g 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 form a 100 ml solution, then 23.0 g of citric acid was added, heated and stirred to dissolve. Add 100ml of foamed silicon carbide carrier to the above solution, soak for half an hour, take it out and dry it, activate it at 500°C for 2 hours to make butadiene foamed silicon carbide-based structured catalyst by oxidative dehydrogenation of butene. Among them, the catalyst active component accounts for 25% of the mass fraction of the entire structured catalyst, the main active component is zinc ferrite, accounting for 60% of the entire active component mass fraction; the secondary active compo...

Embodiment 3

[0038] The catalyst in this example uses silicon carbide foam whose surface has been modified with titania as a carrier, the loading of titania is 30wt%, the pore volume fraction of the silicon carbide foam is 75%, and the pore diameter is 0.5mm.

[0039] Weigh 20.0 g 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 milliliters of solution, then add 25.0 grams of citric acid, heat and stir to dissolve. Add 100ml of foamed silicon carbide carrier to the above solution, soak for half an hour, take it out and dry it, activate it at 500°C for 2 hours to make butadiene foamed silicon carbide-based structured catalyst by oxidative dehydrogenation of butene. Among them, the active component of the catalyst accounts for 21% of the mass fraction of the entire structured catalyst, the main active component is zinc iron chromate, accounting for 60% of the mass fraction of the entire active compo...

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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 production of butadiene by oxidative dehydrogenation of butene. Background technique [0002] With the goals of energy saving, consumption reduction, environmental protection, and intensification, the chemical process intensification technology by means of unit operation equipment strengthening, production process strengthening and information technology strengthening is an important step to realize the goal of "energy saving and green process, efficient and clean production" in the chemical industry. key technologies. Among them, the chemical reaction process intensification technology that can realize the goal of energy saving, consumption reduction and clean production in the chemical industry from the source is a core technology of chemical process intensification. [0003] Heterogeneous catalytic reaction...

Claims

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Application Information

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Patent Type & Authority Patents(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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