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Preparation method of embedded alkaline earth metal oxide solid base and application of embedded alkaline earth metal oxide solid base in biodiesel production

A technology of alkaline earth metals and oxides, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problem of catalytic stability to be improved and unsatisfactory pore structure of solid catalysts and other problems, achieving good industrial application prospects, inhibiting the loss of active sites, and simple methods

Pending Publication Date: 2021-06-25
SHANDONG JIANZHU UNIV
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  • Application Information

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Problems solved by technology

[0007] Inventor's previous research: patent CN110052293A adopts "two-step method" to prepare solid base catalyst, using MIL-100(Fe) as carrier, first adopts impregnation method to load KF, and then performs high-temperature activation and calcination to prepare magnetic solid base catalyst, although it has Good catalytic activity, strong magnetism, etc., but follow-up research found that the pore structure of the solid catalyst is still not ideal, the catalytic stability needs to be improved, and the preparation process of this method needs to be further simplified

Method used

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  • Preparation method of embedded alkaline earth metal oxide solid base and application of embedded alkaline earth metal oxide solid base in biodiesel production
  • Preparation method of embedded alkaline earth metal oxide solid base and application of embedded alkaline earth metal oxide solid base in biodiesel production
  • Preparation method of embedded alkaline earth metal oxide solid base and application of embedded alkaline earth metal oxide solid base in biodiesel production

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preparation example Construction

[0028] A preparation process for an embedded alkaline earth metal oxide solid base, the steps comprising:

[0029] (1) Add metal source, trimesic acid (H 3 BTC), deionized water and absolute ethanol. Stir the metal source, deionized water and absolute ethanol at 30°C for 10 minutes, then add H 3 BTC, continue to heat and stir for 30 minutes until the mixture is uniform;

[0030] (2) Pour the mixed material obtained above into a polytetrafluoroethylene hydrothermal reaction kettle, crystallize at 100°C to 180°C for 24 hours, and cool to room temperature to obtain a solid product;

[0031] (3) Measure 50 mL of methanol to wash the solid obtained in step (2), heat and stir in a 30°C constant temperature water bath for 1.5 h, then centrifuge in a 6000r / min centrifuge for 10 min to remove the supernatant, repeat the above steps twice to obtain a second wash solids;

[0032] (4) Add the twice-washed solid obtained in step (3) into 50 mL of deionized water, stir at 40° C. for 1 h...

Embodiment 1

[0047] A preparation method of an embedded alkaline earth metal oxide solid base, the specific method is as follows:

[0048] (1) Weigh Ca(CH 3 COO) 2 :H 3 BTC: absolute ethanol: deionized water. First Ca(CH 3 COO) 2 Add it into a mixed solvent composed of absolute ethanol and deionized water, stir in a water bath at 30°C for 10 min until fully dissolved, then add H 3 BTC, continue heating and stirring for 30min. Finally, the resulting mixed solution was transferred to a polytetrafluoroethylene reactor, heated at 120° C. for 24 h, and the solid in the lower layer was removed for later use.

[0049] (2) Measure 50 mL of methanol to wash the solid obtained in step (1), heat it in a water bath to 30 ° C and stir for 1.5 h, centrifuge at a speed of 6000 r / min for 10 min in a centrifuge to obtain a washed solid; wash with methanol again under the same conditions The second washing solid was obtained; the second washing solid was placed in 50 mL of deionized water at 40° C. a...

Embodiment 2

[0053] A kind of preparation method of embedded double alkaline earth metal oxide solid base, concrete method is as follows:

[0054] (1) Weigh Ca(CH 3 COO) 2 +Mg(CH 3 COO) 2 :H 3 BTC: absolute ethanol: deionized water. First, the molar ratio of 1:1 Ca(CH 3 COO) 2 and Mg(CH 3 COO) 2 Add it into a mixed solvent composed of absolute ethanol and deionized water, stir in a water bath at 30°C for 10 min until fully dissolved, then add H 3 BTC, continue heating and stirring for 30min. Finally, the resulting mixed solution was transferred to a polytetrafluoroethylene reactor, heated at 150° C. for 24 h, and the solid in the lower layer was removed for later use.

[0055] (2) Measure 50 mL of methanol to wash the solid obtained in step (1), heat it in a water bath to 30 ° C and stir for 1.5 h, centrifuge at a speed of 6000 r / min for 10 min in a centrifuge to obtain a washed solid; wash with methanol again under the same conditions The second washing solid was obtained; the ...

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Abstract

The invention relates to a preparation method of embedded alkaline earth metal oxide solid base and application of the embedded alkaline earth metal oxide solid base in biodiesel production, and belongs to the technical field of biodiesel production. The preparation method comprises the following steps: firstly synthesizing an alkaline earth metal organic framework taking single or multiple alkaline earth metals (Mg, Ca and Sr) as central metal elements, and then controlling a heating process under a non-oxidizing atmosphere to carry out high-temperature pyrolysis, so that alkaline earth metal oxides are embedded into carbon nanosheets to obtain a solid base catalyst, and the catalyst is used for catalyzing ester exchange of palm oil and methanol to produce biodiesel. The active sites of the obtained solid base are anchored on the nano-carbon-like sheet, so that the active sites are directly exposed on the surface of the catalyst, the catalytic activity is improved, the loss of the active sites is inhibited, and the stability of the solid base catalyst is enhanced. From the aspect of a biodiesel production process, the preparation method is simple and convenient to operate, the production cost is reduced, the environmental pollution is favorably relieved, and the industrial application prospect is good.

Description

technical field [0001] The invention relates to the fields of solid base catalysis technology and biodiesel technology. Specifically, it relates to a solid base preparation process using an alkaline earth metal organic framework material as a precursor and its application in the production of biodiesel by catalytic transesterification. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Biodiesel has the advantages of wide range of raw materials, renewable, low pollution emissions, and sufficient combustion. Its main component is fatty acid monoester, which is made of long-chain oils and short-chain alcohols (methanol or ethanol) such as vegetable oils, animal oils, and waste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/02B01J37/10B01J37/08C11C3/10C10L1/02
CPCB01J23/02B01J23/002B01J37/10B01J37/086C11C3/10C10L1/02B01J35/40Y02P30/20
Inventor 李辉王永博崔萍李国宁郭敏周守军陆万鹏于明志
Owner SHANDONG JIANZHU UNIV
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