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Pt/CoFe-LDH supported nano solid catalyst as well as preparation method and application thereof

A solid catalyst, supported technology, used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, reductive alkylation preparations, etc. The problem of low yield of primary amine, etc., achieves the effect of a wide range of applicable substrates, low loading and cost reduction.

Active Publication Date: 2021-12-03
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a Pt / CoFe-LDH supported nanometer solid catalyst and its preparation method and application, to solve the problem that the primary amine yield of the existing reductive amination reaction is not high and is easy to generate By-products, and the problem of easy catalyst deactivation

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  • Pt/CoFe-LDH supported nano solid catalyst as well as preparation method and application thereof
  • Pt/CoFe-LDH supported nano solid catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A preparation method of Pt / CoFe-LDH supported nanometer solid catalyst, comprising the following steps:

[0035] (1) Fe(NO 3 ) 3 9H 2 O and Co(NO 3 ) 2 ·6H 2 O was uniformly dissolved in deionized water to obtain solution 1; wherein, Fe(NO 3 ) 3 9H 2 The concentration of O is 0.3mol / L, Co(NO 3 ) 2 ·6H 2 The concentration of O is 0.6mol / L;

[0036] (2) NaOH and Na 2 CO 3 Dissolve evenly in deionized water to obtain solution 2; wherein, the concentration of NaOH is 1.92mol / L, and NaOH 2 CO 3 The concentration is 0.8mol / L;

[0037] (3) Mix solution 1 and solution 2 uniformly at a volume ratio of 1:1, add them to a stainless steel kettle lined with polytetrafluoroethylene, then place the stainless steel kettle in a high-temperature furnace, and react at a high temperature of 80°C 48h;

[0038] (4) After centrifuging the solution obtained in step (3), the centrifuged solid was washed three times with water and ethanol respectively, and then dried in a drying...

Embodiment 2

[0043] A preparation method of Pt / CoFe-LDH supported nanometer solid catalyst, comprising the following steps:

[0044] (1) Fe(NO 3 ) 3 9H 2 O and Co(NO 3 ) 2 ·6H 2 O was uniformly dissolved in deionized water to obtain solution 1; wherein, Fe(NO 3 ) 3 9H 2 The concentration of O is 0.2mol / L, Co(NO 3 ) 2 ·6H 2 The concentration of O is 0.5mol / L;

[0045] (2) NaOH and Na 2 CO 3 Uniformly dissolve in deionized water to obtain solution 2; wherein, the concentration of NaOH is 1.8mol / L, NaOH 2 CO 3 The concentration is 0.7mol / L;

[0046] (3) Mix solution 1 and solution 2 uniformly at a volume ratio of 1:0.9, then add them to a stainless steel kettle lined with polytetrafluoroethylene, then place the stainless steel kettle in a high-temperature furnace, and react at a high temperature of 75°C 50h;

[0047] (4) After centrifuging the solution obtained in step (3), the centrifuged solid was washed three times with water and ethanol respectively, and then dried in a d...

Embodiment 3

[0052] A preparation method of Pt / CoFe-LDH supported nanometer solid catalyst, comprising the following steps:

[0053] (1) Fe(NO 3 ) 3 9H 2 O and Co(NO 3 ) 2 ·6H 2 O was uniformly dissolved in deionized water to obtain solution 1; wherein, Fe(NO 3 ) 3 9H 2 The concentration of O is 0.4mol / L, Co(NO 3 ) 2 ·6H 2 The concentration of O is 0.7mol / L;

[0054] (2) NaOH and Na 2 CO 3 Uniformly dissolve in deionized water to obtain solution 2; wherein, the concentration of NaOH is 2mol / L, NaOH 2 CO 3 The concentration is 0.9mol / L;

[0055] (3) Mix solution 1 and solution 2 uniformly at a volume ratio of 1:1.5, add them to a stainless steel kettle lined with polytetrafluoroethylene, then place the stainless steel kettle in a high-temperature furnace, and react at a high temperature of 85°C 45h;

[0056] (4) After centrifuging the solution obtained in step (3), the centrifuged solid was washed three times with water and ethanol respectively, and then dried in a drying o...

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Abstract

The invention discloses a Pt / CoFe-LDH supported nano solid catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving a CoFe-LDH carrier in deionized water, adding a Na2PtCl6. 6H2O solution, adding urea, uniformly stirring, heating and refluxing, cooling the obtained solution, adding a NaBH4 solution, and finally centrifuging, cleaning and drying to obtain the Pt / CoFe-LDH supported nano solid catalyst. The prepared catalyst is efficient and stable, generation of by-products in reductive amination reaction can be prevented, and high-selectivity synthesis of primary amine is achieved.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a Pt / CoFe-LDH supported nanometer solid catalyst and its preparation method and application. Background technique [0002] Primary amine compounds are important amine chemicals. They are not only indispensable substances for living organisms, but also can be used as raw materials or intermediates to synthesize high value-added fine chemical products. They are widely used in textile, biology, medicine and other industries. Among the common processes for producing primary amine chemicals, reductive amination reactions have been widely studied. The reductive amination reaction uses aldehydes or ketones as substrates, organic amines or inorganic ammonia as nitrogen sources, and undergoes steps such as substrate amination and hydrogenation in a hydrogen atmosphere to achieve the synthesis of primary amines. The reaction atom utilization rate is high, the raw materials ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07C209/26C07C211/03
CPCB01J23/8913C07C209/26C07C211/03Y02P20/584
Inventor 瞿永泉张赛张铭凯
Owner NORTHWESTERN POLYTECHNICAL UNIV
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