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Catalysts for preparing light olefin through catalysis of ethanol as well as preparation technology and application method of catalysts

A technology of low-carbon olefins and catalysts, which is applied in the field of bio-ethanol catalytic conversion to prepare low-carbon olefins. It can solve the problems of low synthetic ethylene yield and low total yield, and achieve less by-products, increased specific surface area, and ethylene selection. sex increasing effect

Active Publication Date: 2017-05-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two zirconium-based composite metal oxides are prepared by adding rare earth elements on the basis of zirconia, but the total yield of ethylene and propylene is slightly lower, especially the yield of synthetic ethylene is lower

Method used

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  • Catalysts for preparing light olefin through catalysis of ethanol as well as preparation technology and application method of catalysts
  • Catalysts for preparing light olefin through catalysis of ethanol as well as preparation technology and application method of catalysts
  • Catalysts for preparing light olefin through catalysis of ethanol as well as preparation technology and application method of catalysts

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: A preparation method of a catalyst that catalyzes bioethanol to prepare olefins is achieved through the following steps:

[0032] 6.00g ZrO(NO 3 ) 2 2H 2 O and 0.109g bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O was dissolved in 500ml of deionized water, and 8.5ml of ammonia water with a mass fraction of 25% was taken as a precipitating agent. Under the condition that the stirring speed was 300r / min, ammonia water was added dropwise, and the dropping speed remained at 2-3 drops / seconds; after the dropwise addition, continue to stir for 0.5 hours, and then let it stand for 24 hours to settle; after suction filtration, put it in an oven and dry it at 100°C for 24 hours. get ZrO 2 / Bi 2 o 3 catalyst.

Embodiment 2

[0033] Embodiment 2: A preparation method of a catalyst that catalyzes bioethanol to prepare olefins is achieved through the following steps:

[0034] 6.00g ZrO(NO 3 ) 2 2H 2 O and 0.327g bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O was dissolved in 500ml of deionized water, and 8.5ml of ammonia water with a mass fraction of 25% was taken as a precipitating agent; under the condition that the stirring speed was 300r / min, ammonia water was added dropwise, and the dropping speed remained at 2-3 drops / seconds; after the dropwise addition, continue to stir for 0.5 hours, and then let it stand for 24 hours to settle; after suction filtration, put it in an oven and dry it at 100°C for 24 hours. get ZrO 2 / Bi 2 o 3 catalyst.

Embodiment 3

[0035] Embodiment 3: A kind of preparation method of the catalyst that catalyzes bioethanol to prepare olefins is realized through the following steps:

[0036] 6.00g ZrO(NO 3 ) 2 2H 2 O and 0.545g bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O was dissolved in 500ml of deionized water, and 8.5ml of ammonia water with a mass fraction of 25% was taken as a precipitating agent; under the condition that the stirring speed was 300r / min, ammonia water was added dropwise, and the dropping speed remained at 2-3 drops / seconds; after the dropwise addition, continue to stir for 0.5 hours, and then let it stand for 24 hours to settle; after suction filtration, put it in an oven and dry it at 100°C for 24 hours. get ZrO 2 / Bi 2 o 3 catalyst.

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Abstract

The invention discloses a preparation method of catalysts for preparing light olefin through catalysis of ethanol. The preparation method is characterized by comprising steps as follows: (1), a Zr source and a metal source are dissolved in deionized water, and a mixed aqueous solution is obtained, wherein the metal source is a Bi source or an Sr source; (2), a precipitant is dropwise added to the mixed aqueous solution at the speed of 2-3 drops / second under the stirring condition, the solution is continuously stirred for 0.5-1 h after the precipitant is dropwise added, and then the solution is subjected to static settlement, suction filtration and drying; (3), a dried sample is roasted at the temperature of 500-700 DEG C, and the Zr based compound metal oxide catalysts are obtained. The catalysts prepared with the preparation method include a ZrO2 / Bi2O3 catalyst and a ZrO2 / SrO catalyst, the synthesized compound metal ZrO2 catalysts show good selectivity and stability, total yield of ethylene and propylene is 77.4%-80.8%, the largest yield of ethylene is 47.4% when doping amount of Sr is 1%, and the yield of ethylene is greatly increased.

Description

technical field [0001] The invention relates to the application field of bioethanol catalytic conversion to prepare low-carbon olefins, in particular to a catalyst synthesis process and application for preparing low-carbon olefins. Background technique [0002] Low-carbon olefins (such as ethylene and propylene) have always been important basic raw materials for organic chemicals and petrochemicals, and their production level is an important indicator to measure the development level of a country's chemical industry. Ethylene and propylene are the basic chemical raw materials for the synthesis of polypropylene, acrylonitrile, polyethylene, acetone and other products. A series of chemical products can be obtained by extending the synthesis from these products. At the same time, ethylene derivatives and propylene derivatives can also be widely used Used in a variety of synthetic materials, and today's society is inseparable from synthetic materials, which leads to a sharp incr...

Claims

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Application Information

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IPC IPC(8): B01J23/02B01J23/18B01J35/10C07C1/24C07C11/06C07C11/04
CPCC07C1/24B01J23/02B01J23/18B01J35/613B01J35/633B01J35/651C07C11/04C07C11/06Y02P20/52
Inventor 夏薇王芳芳穆锡川黄飚陈坤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)