Preparation method and application of bimetallic catalyst for preparing alanine through lactic acid amination

A bimetallic catalyst, alanine technology, applied in catalyst activation/preparation, preparation of organic compounds, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of single reaction catalytic system, difficult catalyst separation, recycling Using problems such as poor utilization to achieve the effects of simple reaction operation, strong applicability and less by-products

Active Publication Date: 2020-05-08
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method and application of a magnetic bimetallic catalyst for the amination of lactic acid to prepare alanine. It is used in industrial production and solves the problems of single reaction catalytic system, difficult catalyst separation and poor recycling in the prior art

Method used

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  • Preparation method and application of bimetallic catalyst for preparing alanine through lactic acid amination
  • Preparation method and application of bimetallic catalyst for preparing alanine through lactic acid amination
  • Preparation method and application of bimetallic catalyst for preparing alanine through lactic acid amination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation of magnetic bimetallic catalyst Ru-Ni@C

[0026] Include the following steps:

[0027] Preparation of catalyst precursor CA-Ni: 17.8gNi(NO 3 ) 2 ·6H 2 O, 11.72g of citric acid was dissolved in 5mL of water, stirred at 60°C for 6h to gel, and then placed in a vacuum oven at 60°C for 8h to obtain catalyst precursor powder CA-Ni;

[0028] Preparation of single metal catalyst Ni@C: put catalyst precursor powder CA-Ni in 30mL / min N 2 Calcined at 600°C for 4 hours in the air flow, reduction carbonization reaction occurs, and the heating rate is 2°C / min. The calcined catalyst was taken out and poured into 1mol / L sulfuric acid solution, and stirred at 70°C for 12 hours to wash away insufficiently encapsulated nickel particles. The acid-washed catalyst was fully washed several times in distilled water to achieve neutrality, and then dried in a vacuum freeze dryer to obtain a single metal catalyst Ni@C;

[0029] Preparation of bimetallic catalyst Ru-N...

Embodiment 2

[0030] Example 2: Preparation of magnetic bimetallic catalyst Pt-Ni@C

[0031] Include the following steps:

[0032] Preparation of catalyst precursor CA-Ni: 17.8g Ni(NO 3 ) 2 ·6H 2 O, 11.72g of citric acid was dissolved in 5mL of water, stirred at 60°C for 6h to gel, and then dried in a vacuum oven at 60°C for 8h to obtain the precursor powder CA-Ni;

[0033] Preparation of single metal catalyst Ni@C: put catalyst precursor powder CA-Ni in 30mL / min N 2 Roast at 600°C for 4 hours in airflow, with a heating rate of 2°C / min. The calcined catalyst was taken out and poured into 1mol / L sulfuric acid solution, and stirred at 70°C for 12 hours to wash away insufficiently encapsulated nickel particles. The acid-washed catalyst was fully washed several times in distilled water to achieve neutrality, and then dried in a vacuum freeze dryer to obtain a single metal catalyst Ni@C;

[0034] Preparation of bimetallic catalyst Pt-Ni@C: add H in a three-necked flask 2 PtCl 6 ·6H 2 O ...

Embodiment 3

[0035] Example 3: Preparation of magnetic bimetallic catalyst Pd-Ni@C

[0036]Include the following steps:

[0037] Preparation of catalyst precursor CA-Ni: 17.8g Ni(NO 3 ) 2 ·6H 2 O, 11.72g of citric acid was dissolved in 5mL of water, stirred at 60°C for 6h to gel, and then dried in a vacuum oven at 60°C for 8h to obtain the precursor powder CA-Ni;

[0038] Preparation of single metal catalyst Ni@C: put catalyst precursor powder CA-Ni in 30mL / min N 2 Roast at 600°C for 4 hours in airflow, with a heating rate of 2°C / min. The calcined catalyst was taken out and poured into 1mol / L sulfuric acid solution, and stirred at 70°C for 12 hours to wash away insufficiently encapsulated nickel particles. The acid-washed catalyst was fully washed several times in distilled water to achieve neutrality, and then dried in a vacuum freeze dryer to obtain a single metal catalyst Ni@C;

[0039] Preparation of bimetallic catalyst Pd-Ni@C: adding PdCl to a three-necked flask 2 0.025g (the...

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Abstract

The invention discloses a preparation method and an application of a magnetic bimetallic catalyst for preparing alanine through lactic acid amination. The obtained magnetic bimetal M-Ni@C is used as acatalyst, ammonia water is used as a solvent, efficient conversion of alanine can be realized by carrying out reductive amination reaction under the action of H2, byproducts are few, the catalyst iseasy to separate and recover and is suitable for industrial production, and the problems of single reaction catalytic system, difficulty in catalyst separation and poor cyclic utilization in the priorart are solved.

Description

Technical field: [0001] The invention relates to the synthesis of alanine, in particular to a preparation method and application of a bimetallic catalyst used for amination of lactic acid to prepare alanine. Background technique: [0002] Amino acids are the basic units of proteins and are widely used in food, medicine, industrial applications and other fields. Alanine is one of the 20 amino acids that make up human protein, and its molecular formula is C 3 h 7 NO 2 . [0003] The commonly used methods for the synthesis of amino acids are divided into biological fermentation and chemical synthesis. The biological fermentation method has strict operating conditions, takes a long time, and is not suitable for large-scale production. Therefore, it is very necessary to develop a chemical synthesis method with strong operability. The early method of synthesizing amino acids was the Strecker synthesis method, but toxic HCN was used as a raw material, which caused great harm t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07C227/08C07C229/08B01J37/08B01J37/16
CPCC07C227/08B01J23/892B01J37/08B01J37/16B01J35/0033C07C229/08Y02P20/584
Inventor 刘琪英修忠勋马隆龙王晨光张琦王海永辛浩升
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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