Supported catalyst and preparation method thereof

A supported catalyst and carrier technology, applied in the field of catalytic synthesis, can solve the problems of low selectivity and rapid deactivation, and achieve the effects of simple preparation process, simple composition, high selectivity and stability

Inactive Publication Date: 2021-02-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] According to one aspect of the present application, a supported catalyst is provided, which overcomes the defects of low selectivity of the target product and rapid deactivation of existing catalysts, in the reaction of synthesizing 1,3-butadiene from ethanol and acetaldehyde It exhibits ultra-high selectivity and stability, and the preparation process is simple, the raw materials are cheap and easy to obtain, and can be used for large-scale industrial production

Method used

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  • Supported catalyst and preparation method thereof
  • Supported catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0060] The preparation of embodiment 1 catalyst

[0061]Dissolve 0.2944g of tantalum ethoxide and 0.0038g of zirconium oxynitrate in 20mL of absolute ethanol, add 1.84g of coarse-porous silica gel powder, stir at room temperature for 12h, and then continue to stir at 60°C until the solution is evaporated to dryness. Calcined in the atmosphere for 4h to obtain tantalum pentoxide-zirconia / silicon dioxide catalyst, denoted as sample 1 # .

Embodiment 2

[0062] The preparation of embodiment 2 catalyst

[0063] Dissolve 0.0184g of tantalum ethoxide and 0.075g of zirconium oxynitrate in 20mL of absolute ethanol, add 1.95g of coarse-porous silica gel powder, stir at room temperature for 12h, and then continue to stir at 60°C until the solution is evaporated to dryness. Calcined in the atmosphere for 4h to obtain tantalum pentoxide-zirconium dioxide / silicon dioxide catalyst, denoted as sample 2 # .

Embodiment 3

[0064] The preparation of embodiment 3 catalyst

[0065] Dissolve 0.074g of tantalum ethoxide and 0.038g of zirconium oxynitrate in 20mL of absolute ethanol, add 1.94g of DavisilGrade 633 silica gel powder, stir at room temperature for 12h, then continue stirring at 60°C until the solution is evaporated to dryness, and the obtained powder is heated at 550°C Calcined in air atmosphere for 4h to obtain tantalum pentoxide-zirconium dioxide / silicon dioxide catalyst, denoted as sample 3 # .

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Abstract

The present invention discloses a supported catalyst, the supported catalyst comprises a carrier and an active component supported on the carrier, and the carrier comprises silica; the active component comprises tantalum pentoxide and zirconium dioxide. The supported catalyst is an efficient catalyst for olefin synthesis, the composition is simple, and the raw materials are cheap and easily available. The invention also discloses a preparation method of the supported catalyst. The method at least comprises the following steps: (1) obtaining a solution containing an active component precursor;and (2) adding the carrier into the solution containing the active component precursor, reacting and roasting to obtain the supported catalyst. The preparation method of the supported catalyst is simple in process and strong in operability, and can be used for large-scale industrial production.

Description

technical field [0001] The application relates to a supported catalyst and a preparation method thereof, more specifically to a supported catalyst used in the reaction of ethanol and acetaldehyde to prepare 1,3-butadiene and a preparation method thereof, belonging to the field of catalytic synthesis. Background technique [0002] 1,3-Butadiene is an important organic chemical raw material for synthetic rubber and resin products, and its traditional production method is mainly a by-product of naphtha cracking process. With the depletion of fossil energy, it is of great significance to find other raw material resources or develop new production routes. [0003] Before the full rise of the petroleum industry in the 1940s, the synthesis of 1,3-butadiene by ethanol catalytic conversion was the main production method of 1,3-butadiene in the world. In recent years, the production of ethanol produced by biological fermentation technology has gradually increased. In addition, the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20C07C1/24C07C11/167
CPCB01J23/20C07C1/24C07C11/167
Inventor 金长子黄声骏张大治焦雨桐虞永华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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