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Molecular sieve confinement metal oxide catalyst, and preparation method and application of molecular sieve confinement metal oxide catalyst in catalytic synthesis of pentamethylene diamine

A molecular sieve and catalyst technology, which is applied in the field of molecular sieve-confined metal oxide catalysts and preparation, can solve the problem of low selectivity of pentamethylenediamine, achieve the effects of reducing production costs, maintaining a good catalyst structure, and avoiding agglomeration

Active Publication Date: 2021-11-05
郑州中科新兴产业技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the selectivity of chemical synthesis of pentamethylenediamine is low

Method used

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  • Molecular sieve confinement metal oxide catalyst, and preparation method and application of molecular sieve confinement metal oxide catalyst in catalytic synthesis of pentamethylene diamine
  • Molecular sieve confinement metal oxide catalyst, and preparation method and application of molecular sieve confinement metal oxide catalyst in catalytic synthesis of pentamethylene diamine
  • Molecular sieve confinement metal oxide catalyst, and preparation method and application of molecular sieve confinement metal oxide catalyst in catalytic synthesis of pentamethylene diamine

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Experimental program
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Embodiment 1

[0023] The preparation method of the molecular sieve confined metal oxide catalyst in this embodiment is as follows:

[0024] The Ru@FAU-1 catalyst was prepared by combining in-situ synthesis and static synthesis. The specific preparation steps were as follows: dissolve 5.6 g of sodium hydroxide in 50 ml of deionized water, stir vigorously until completely dissolved, and then add 0.675 g of metaaluminic acid Sodium, after the mixed solution is stirred evenly, add 25.38 g of silica sol (silica containing 25%), then add 0.665 g of ruthenium trichloride, stir the resulting mixed solution at room temperature for 4 hours, then transfer it to a stainless steel reaction kettle, and place it in a 100 °C oven Medium crystallization for 12 h. After the reaction was completed, the reactor was cooled to room temperature, the suspension was poured into a centrifuge tube, centrifuged, washed with deionized water until the pH was equal to 7, and dried in an oven at 80°C overnight to prepare ...

Embodiment 2

[0029] The preparation method of the molecular sieve confined metal oxide catalyst in this embodiment is as follows:

[0030] The 5% Ru@FAU-2 catalyst was prepared by combining in-situ synthesis and static synthesis. The specific preparation steps were as follows: dissolve 5.6 g of sodium hydroxide in 50 ml of deionized water, stir vigorously until completely dissolved, and then add 0.675 g Sodium metaaluminate, after the mixed solution is stirred evenly, add 4.23 g of silica sol (silicon dioxide contains 25%), then add 0.342 g of ruthenium trichloride, and the resulting mixed solution is stirred at room temperature for 4 hours and then transferred to a stainless steel reactor. Crystallized in an oven at 100 °C for 12 h. After the reaction was completed, the reactor was cooled to room temperature, the suspension was poured into a centrifuge tube, centrifuged, washed with deionized water until the pH was equal to 7, and then dried in an oven at 80°C overnight to obtain 5% Ru@FA...

Embodiment 3

[0035] The preparation method of the molecular sieve confined metal oxide catalyst in this embodiment is as follows:

[0036] The method of combining in-situ synthesis and static synthesis was adopted, and Ru@FAU-3 catalyst was prepared by dealumination with citric acid. The specific preparation steps were as follows: 5.6 g of sodium hydroxide was dissolved in 50 ml of deionized water, stirred vigorously until completely dissolved, Then add 0.675g sodium metaaluminate to it, add 25.38g silica sol (silicon dioxide contains 25%) after the mixed solution is stirred evenly, then add 0.665g ruthenium trichloride, stir the gained mixed solution at room temperature for 4 hours, then transfer to In a stainless steel reactor, crystallize in an oven at 100 °C for 12 h. After the reaction was completed, the reactor was cooled to room temperature, the suspension was poured into a centrifuge tube, centrifuged, washed with deionized water until the pH was equal to 7, dried in an oven at 80°...

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Abstract

The invention provides a molecular sieve confinement metal oxide catalyst, and a preparation method and application of the molecular sieve confinement metal oxide catalyst in catalytic synthesis of pentamethylene diamine. The molecular sieve confinement metal oxide catalyst with good lysine decarboxylation catalysis performance is prepared by adopting an in-situ synthesis and dynamic synthesis combined method. The method comprises the steps: putting lysine or lysine salt, water and a molecular sieve confinement metal oxide catalyst into a high-pressure reaction kettle, and reacting to obtain an aqueous solution containing pentamethylene diamine; the molecular sieve confinement metal catalyst is prepared by adopting the in-situ synthesis method, metal active components of the catalyst are effectively immobilized, agglomeration of the active components is avoided, and the structure of the catalyst is well kept; and when the catalyst is used for lysine decarboxylation reaction, the production rate of pentamethylene diamine is effectively improved, the selectivity of pentamethylene diamine reaches 49% after 15 minutes of reaction, the reaction time is greatly shortened, the reaction cost is remarkably reduced, and the industrial application prospect is quite wide.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a molecular sieve-confined metal oxide catalyst, a preparation method and an application. Background technique [0002] 1,5-pentanediamine, also known as cadaverine, can be polymerized with adipic acid to produce nylon 56 material. Nylon 56 material has good comprehensive properties, such as high moisture absorption and perspiration rate, good air permeability, softness and dyeing performance, etc., and it is wear-resistant, chemical-resistant, flame-retardant and easy to process. Among the nylon material series Have a strong competitive advantage. The most reported production method of 1,5-pentanediamine is biological fermentation. Nanjing University of Technology uses soybean dregs hydrolyzate to ferment and produce pentamethylenediamine (CN201810954086.X). However, pentamethylenediamine is toxic to microorganisms and affects production efficiency. Shanghai Kaisai Biotechno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/12B01J29/85B01J35/10C07C209/68C07C211/09
CPCB01J29/126B01J29/85C07C209/68B01J2229/186B01J35/633B01J35/615C07C211/09Y02P20/584
Inventor 黄玉红马占玲辛宗武秦绍杰张延强
Owner 郑州中科新兴产业技术研究院
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