Wollastonite-loaded strontium and lanthanum solid base catalyst as well as preparation method and application thereof

A technology of solid base catalyst and wollastonite, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., and can solve complex process, leaching deactivation, raw oil Higher quality requirements and other issues, to achieve the effect of wide sources, simple and feasible preparation methods

Active Publication Date: 2021-01-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high-activity heterogeneous catalysts also have problems such as complex process, high cost, leaching deactivation, and high requirements for raw oil quality, which need further research and solution.

Method used

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  • Wollastonite-loaded strontium and lanthanum solid base catalyst as well as preparation method and application thereof
  • Wollastonite-loaded strontium and lanthanum solid base catalyst as well as preparation method and application thereof

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preparation example Construction

[0026]In the second aspect, the present invention provides a preparation method of the solid base catalyst, which includes the following steps:

[0027]Add the strontium source, lanthanum source and wollastonite powder to water, stir and immerse;

[0028]The impregnated product is dried, calcined and activated to obtain a solid base catalyst.

[0029]In some embodiments, the strontium source is a compound that is soluble in water and the cation is strontium ion, such as strontium chloride, strontium nitrate and the like.

[0030]In some embodiments, the lanthanum source is a compound that is soluble in water and the cation is a lanthanum ion, such as lanthanum chloride, lanthanum nitrate, and the like.

[0031]In order to reduce the influence of anions on the catalyst preparation process and catalytic effect, the strontium source and the lanthanum source are preferably nitrates.

[0032]In some embodiments, during the dipping process, the concentration of the strontium salt solution is 0.9-0.1 mol / L;...

Embodiment 1

[0050]Weigh 12g natural wollastonite ore powder, 14.81g strontium nitrate (Sr(NO3)2·4H2O) and 9.75g lanthanum nitrate (La(NO3)3·XH2O) Add to 100 mL of deionized water, stir and immerse for 0.5 h to obtain a mixed solution. Put the beaker of the mixed solution into a water bath with a stirring device, and evaporate to dryness in a water bath at 80°C. The obtained catalyst precursor was dried at 120°C for 12 hours, and then heated from 20°C to 900°C at a heating rate of 5°C / min, and then calcined and activated for 5 hours to obtain a wollastonite load with a strontium / lanthanum molar ratio of 7 / 3. Highly stable solid base catalyst of strontium and lanthanum.

[0051]10.5g methanol, 20g palm oil and 1.6g catalyst were successively added into the autoclave, heated to 150°C and maintained for 3h under continuous stirring at a speed of 1200r / min. Separate the solid catalyst from the reaction product through a centrifuge, pour the liquid product into a separatory funnel, let it stand for sepa...

Embodiment 2

[0056]Weigh 12g natural wollastonite ore powder, 19.05g strontium nitrate (Sr(NO3)2·4H2O) and 3.25g lanthanum nitrate (La(NO3)3·XH2O) Add to 100 mL of deionized water, stir and immerse for 0.5 h to obtain a mixed solution. Put the beaker of the mixed solution into a water bath with a stirring device, and evaporate to dryness in a water bath at 80°C. The obtained catalyst precursor was dried at 120°C for 12 hours, and then heated from 20°C to 900°C at a heating rate of 5°C / min, and then calcined and activated for 5 hours to obtain a wollastonite load with a strontium / lanthanum molar ratio of 9 / 1. Highly stable solid base catalyst of strontium and lanthanum.

[0057]10.5g methanol, 20g palm oil and 1.6g catalyst were successively added into the autoclave, and heated to 150°C and maintained for 3h under continuous stirring at a speed of 1200r / min. Separate the solid catalyst from the reaction product through a centrifuge, pour the liquid product into a separatory funnel, let it stand for ...

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Abstract

The invention discloses a wollastonite-loaded strontium and lanthanum solid base catalyst and a preparation method and application thereof, and the solid base catalyst comprises a wollastonite carrierand strontium oxide and lanthanum oxide loaded on wollastonite. In the process of loading strontium oxide and lanthanum oxide on wollastonite, active sites can be uniformly distributed on the surfaceof the carrier, so that the agglomeration of active sites is effectively avoided, the effective contact between reactant molecules and the active sites is enhanced, the catalyst is ensured to have high catalytic activity, and the mechanical strength of the catalyst is enhanced due to the existence of the wollastonite carrier; the active site loss caused by the mechanical stress of the collision between the catalyst particles and other particles or the container wall is reduced, and the strontium oxide (SrO) and the wollastonite react to generate the new phase CaSrSiO4 so as to improve the immobilization rate of the active sites, such that the catalyst has good reuse stability.

Description

Technical field[0001]The invention belongs to the technical field of catalyst preparation, and specifically relates to a wollastonite-supported strontium and lanthanum solid base catalyst, and a preparation method and application thereof.Background technique[0002]Disclosure of the background information is only intended to increase the understanding of the overall background of the present invention, and is not necessarily regarded as an acknowledgement or in any form suggesting that the information constitutes the prior art known to those of ordinary skill in the art.[0003]Biodiesel (biodiesel) is a liquid fuel whose main component is long-chain fatty acid methyl ester obtained by transesterification reaction of animal and vegetable fats and oils with lower alcohols (methanol or ethanol). It is renewable, non-toxic, biodegradable, It does not contain sulfur and aromatic components and is considered to be an excellent substitute for fossil diesel. Compared with traditional fossil di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10C11C3/10C10L1/02
CPCB01J23/10C10L1/02C11C3/10Y02E50/10
Inventor 牛胜利曲同鑫韩奎华李英杰路春美程世庆
Owner SHANDONG UNIV
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