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

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

Inactive Publication Date: 2020-11-13
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, le

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

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[0026] In a second aspect, the present invention provides a method for preparing the solid base catalyst, comprising the following steps:

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

[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 soluble in water and the cation is a strontium ion, such as strontium chloride, strontium nitrate, and the like.

[0030] In some embodiments, the lanthanum source is a compound 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 impregnation process, the concentration of the strontium salt solution ...

Embodiment 1

[0050] Weigh 12g of natural wollastonite ore powder, 14.81g of strontium nitrate (Sr(NO) in turn. 3 ) 2 ·4H 2 O) and 9.75g lanthanum nitrate (La(NO) 3 ) 3 ·xH 2 O) was added to 100 mL of deionized water, stirred and immersed for 0.5 h to obtain a mixed solution. The beaker of the mixed solution was placed in a water bath with a stirring device, and evaporated to dryness in a water bath at 80°C. The obtained catalyst precursor was dried at 120 °C for 12 h, and then calcined and activated at a heating rate of 5 °C / min from 20 °C to 900 °C for 5 h, to obtain a wollastonite supported with a strontium / lanthanum molar ratio of 7 / 3 Highly stable solid base catalysts for strontium and lanthanum.

[0051] 10.5 g of methanol, 20 g of palm oil and 1.6 g of catalyst were successively added to the autoclave, and heated to 150° C. for 3 h under continuous stirring at a rotational speed of 1200 r / min. The solid catalyst was separated from the reaction product by a centrifuge, the liqu...

Embodiment 2

[0056] Weigh 12g of natural wollastonite ore powder, 19.05g of strontium nitrate (Sr(NO) in turn. 3 ) 2 ·4H 2 O) and 3.25g lanthanum nitrate (La(NO) 3 ) 3 ·xH 2 O) was added to 100 mL of deionized water, stirred and immersed for 0.5 h to obtain a mixed solution. The beaker of the mixed solution was placed in a water bath with a stirring device, and evaporated to dryness in a water bath at 80°C. The obtained catalyst precursor was dried at 120 °C for 12 h, and then calcined and activated at a heating rate of 5 °C / min from 20 °C to 900 °C for 5 h, to obtain a wollastonite supported with a strontium / lanthanum molar ratio of 9 / 1. Highly stable solid base catalysts for strontium and lanthanum.

[0057] 10.5 g of methanol, 20 g of palm oil and 1.6 g of catalyst were successively added to the autoclave, and heated to 150° C. for 3 h under continuous stirring at a rotational speed of 1200 r / min. The solid catalyst was separated from the reaction product by a centrifuge, the liq...

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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, strontium oxide and lanthanum oxide are loaded, active sites can be uniformly distributed on the surface of the carrier, the agglomeration phenomenon of active sites is effectively avoided, effective contact between reactant molecules and active sites is enhanced, high catalytic activity of the catalyst is ensured, and the mechanical strength of the catalyst is enhanced in the presence of the wollastonite carrier. According to the present invention, 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 site, such that the catalyst has good reuse stability.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a wollastonite-supported strontium and lanthanum solid base catalyst and a preparation method and application thereof. Background technique [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] Biodiesel is a liquid fuel whose main component is long-chain fatty acid methyl esters obtained by transesterification of animal and vegetable oils and low-carbon alcohols (methanol or ethanol) as raw materials. The advantages of being free of sulfur and aromatic components make it an excellent alternative to fossil diesel. Compared with traditional fossil diesel, biodiesel has similar ...

Claims

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Application Information

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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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