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Lattice oxygen catalyst used for preparing butadiene through butylene oxidative dehydrogenation, and preparation method thereof

A technology of oxidative dehydrogenation and lattice oxygen, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low space velocity, low production efficiency, production high cost

Active Publication Date: 2013-03-20
北京中石润达科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the hourly space velocity of the catalyst of the above-mentioned patented technology is low when it is used in industry for the oxidative dehydrogenation of butene, generally 200-400h -1 , resulting in lower production efficiency and higher production costs

Method used

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  • Lattice oxygen catalyst used for preparing butadiene through butylene oxidative dehydrogenation, and preparation method thereof
  • Lattice oxygen catalyst used for preparing butadiene through butylene oxidative dehydrogenation, and preparation method thereof
  • Lattice oxygen catalyst used for preparing butadiene through butylene oxidative dehydrogenation, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Sol-co-precipitation method: Accurately weigh analytically pure Fe(NO 3 ) 3 9H 2 O 404.0g, analytically pure Zn(NO 3 ) 2 ·6H 2 O 238.0g, analytically pure Mg(NO 3 ) 2 ·6H 2 O 12.8g, analytically pure La(NO 3 ) 3 ·6H 2 O 2.0 g. Add 1500ml of deionized water to prepare a mixed solution. Then add 330.0 g of aminoacetic acid and 8.0 g of scallop powder, mix well, and stir at 70° C. for 1 hour to obtain a sol. The obtained sol is precipitated with a mixed solution of 3mol / L ammonia water and ammonium carbonate, and the mixed solution is slowly added dropwise to the sol at a constant temperature of 50°C under stirring, and the pH value of the solution is monitored with a pH meter until the pH value is 8.0. Add dropwise. The obtained precipitate was aged at a constant temperature of 50° C. for 2.0 hours. Wash twice with deionized water until the pH value is lower than 7.5. Then vacuum filter, and dry at 50°C for 5 hours, at 80°C for 5 hours, and at 100°C for 5 h...

Embodiment 2

[0050] Sol-gel-self-combustion method: Accurately weigh analytically pure Fe(NO 3 ) 3 9H 2 O 404.0g, analytically pure Zn(NO 3 ) 2 ·6H 2 O 193.5g, analytically pure Co(NO 3 ) 2 ·6H 2 O 14.5g, 50% analytically pure Mn(NO 3 ) 2 10ml of solution, 4.0g of scallop powder. Add 1500ml of deionized water to prepare a mixed solution. Add 285.0 g of citric acid, mix well, and stir at 50° C. for 1 hour to obtain a sol. The obtained sol was kept at a constant temperature of 80°C and the excess water was evaporated under stirring until a viscous gel was formed, and then the temperature was lowered to obtain a gel. The gel was placed in a metal container with a volume of 1L, then transferred to a muffle furnace and slowly heated to 280°C, kept for 2 hours to fully spontaneously ignite, and then spontaneously ignited and cooled to room temperature. The resulting sample was taken and 7.5 g of graphite, 1.0 g of paraffin, 15.0 g of Al 2 o 3 , placed in a ball mill for ball millin...

Embodiment 3

[0057] Sol-co-precipitation method: Accurately weigh analytically pure Fe(NO 3 ) 3 9H 2 O 404.0g, analytically pure Zn(NO 3 ) 2 ·6H 2 O 180.0g, analytically pure Mg(NO 3 ) 2 ·6H 2 O 25.5g. Add 1900ml of deionized water to prepare a mixed solution. Then add 435.0 g of aminoacetic acid and 10.0 g of scallop powder, mix well, and stir at 60° C. for 1 hour to obtain a sol. The obtained sol was precipitated with 2 mol / L ammonia water, and the ammonia water was added dropwise to the sol at a constant temperature of 60°C under stirring, and the pH value of the solution was monitored with a pH meter until the pH value was 8.5, and the ammonia water was stopped dropping. The obtained precipitate was aged at a constant temperature of 60°C for 1.5 hours. Wash twice with deionized water, stop at pH 7.5, and dry to obtain a filter cake; then use 1000ppm NaNO 3 with 500ppm of Mg(NO 3 ) 2 100ml of the mixed solution was used to soak the filter cake for 1 hour. Then vacuum filte...

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Abstract

The invention relates to a lattice oxygen catalyst used for preparing butadiene through butylene oxidative dehydrogenation. The catalyst is composed of 80.0-95.0wt% of a substrate comprising alpha-Fe2O3 and MFe2O4, 4.0-19.0wt% of a structural auxiliary agent comprising SiO2 and / or Al2O3, and 0.001-1.0 wt% of a reaction performance modulation auxiliary agent AOx. In the substrate, the content of alpha-Fe2O3 is 10.0-60.0wt%. M is Zn or a composition of Zn and one or more metals selected from alkaline earth metals and transition metals. A is selected from alkali metals, alkaline earth metals, rare earth metals, and compositions thereof. x is 1-2. The invention also relates to a preparation method of the lattice oxygen catalyst used for preparing butadiene through butylene oxidative dehydrogenation.

Description

technical field [0001] The present invention relates to a kind of lattice oxygen catalyst that is used for oxidative dehydrogenation of butene to prepare butadiene and preparation method thereof, more specifically, the present invention relates to a kind of iron-based catalyst that is used for oxidative dehydrogenation of butene to prepare butadiene Composite oxide lattice oxygen catalyst and preparation method thereof. Background technique [0002] Butadiene is an important monomer for synthetic rubber and the like. The main production method is the extraction of butadiene, a by-product of steam cracking of naphtha, which is greatly affected by the price of petroleum. Butadiene has been produced industrially by oxidative dehydrogenation of butane and / or butene. Because alkanes are relatively stable, the butane dehydrogenation process generally has a higher temperature and more side reactions. The typical reaction temperature is 600 ° C, and the yield of butadiene based on...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/889B01J23/80C07C11/167C07C5/48C01B31/20C01B32/50
Inventor 郭绍辉
Owner 北京中石润达科技发展有限公司
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