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Active carbon loaded ruthenium-platinum bimetallic composite catalyst, and preparation method and applications thereof

A technology of composite catalyst and activated carbon, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, catalyst carrier, etc., which can solve the problems of high reaction pressure and temperature, large catalyst consumption and low selectivity , to achieve the effect of low cost, high yield and high catalytic activity

Active Publication Date: 2017-02-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problems in the prior art that the reaction pressure and temperature are high, the catalyst consumption is large, the selectivity is low, the cost is high and the yield is low when synthesizing L-amino propanol by catalytic hydrogenation, and a kind of use is provided. Activated carbon-supported ruthenium-platinum bimetallic composite catalyst for synthesizing L-aminopropanol and its preparation method and application, the catalyst has a high Activity and high selectivity, which can reduce the cost and increase the yield of L-aminopropanol synthesis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 0.0260g ruthenium chloride trihydrate, 2.6×10 -4 Add 2 g of chloroplatinic acid into a magnetically stirred tank containing 26 ml of propylene carbonate, fill it with hydrogen pressure to 4 MPa, and react for 2 h at 80° C. to obtain a Ru-Pt nanoparticle sol; add 1 g of pretreated activated carbon to the sol , stirred and adsorbed for 2h, filtered, then washed with water (50mL × 3), washed with acetone (20mL × 3), and vacuum-dried at 300°C for 3h to obtain a ruthenium-platinum bimetallic composite catalyst supported by activated carbon. In the obtained catalyst, the ruthenium loading is 1 wt%, and the platinum loading is 0.1 wt%.

Embodiment 2

[0039] 0.0780g ruthenium chloride trihydrate, 7.8×10 -4Add 1 g of chloroplatinic acid into a magnetically stirred kettle containing 78 ml of propylene carbonate, fill it with hydrogen pressure to 4 MPa, and react for 2 h at 80° C. to obtain a Ru-Pt nanoparticle sol; add 1 g of pretreated activated carbon to the sol , stirred and adsorbed for 2h, filtered, then washed with water (50mL × 3), washed with acetone (20mL × 3), and vacuum-dried at 300°C for 3h to obtain a ruthenium-platinum bimetallic composite catalyst supported by activated carbon. In the obtained catalyst, the ruthenium loading is 3 wt%, and the platinum loading is 0.3 wt%.

Embodiment 3

[0041] 0.1300g ruthenium chloride trihydrate, 1.3×10 -3 Add 1 g of chloroplatinic acid into a magnetically stirred kettle containing 130 ml of propylene carbonate, fill it with hydrogen pressure to 4 MPa, and react for 2 h at 80° C. to obtain a Ru-Pt nanoparticle sol; add 1 g of pretreated activated carbon to the sol , stirred and adsorbed for 2h, filtered, then washed with water (50mL × 3), washed with acetone (20mL × 3), and vacuum-dried at 300°C for 3h to obtain a ruthenium-platinum bimetallic composite catalyst supported by activated carbon. In the obtained catalyst, the ruthenium loading is 5 wt%, and the platinum loading is 0.5 wt%.

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Abstract

The invention provides an active carbon loaded ruthenium-platinum bimetallic composite catalyst. A preparation method comprises following steps: active carbon is added into a nitric acid solution for stirring dipping; an obtained solution is filtered; an obtained filter cake is washed with deionized water until pH value is increased to be 7, and is delivered into a tube furnace for calcination under N2 protection for further processing; trihydrate ruthenium chloride, chloroplatinic acid, and propylene carbonate are mixed, a reducing agent is added for reduction so as to obtain ruthenium-platinum nanoparticle sol; the active carbon obtained via pretreatment is added, an obtained mixture is subjected to stirring adsorption, and then is subjected to filtering, water washing, acetone washing, and vacuum drying so as to obtain the active carbon loaded ruthenium-platinum bimetallic composite catalyst. According to the preparation method, active carbon is taken as a carrier, the carrier is cheap and easily available. The preparation method is simple; catalytic activity is high; stability is high; hydrogenation of L-aminopropionic acid is realized at a relatively low temperature at a relatively low pressure in water phase; preparation of L-alaninol is realized; cost is low; yield is high; process is sample; and the preparation method is capable of according with green chemical principles.

Description

[0001] (1) Technical field [0002] The invention belongs to the technical field of catalysts, and in particular relates to a ruthenium-platinum bimetallic composite catalyst supported by activated carbon, a preparation method thereof, and an application in catalyzing the hydrogenation of L-alanine to prepare L-aminopropanol. [0003] (2) Background technology [0004] L-aminopropanol is the key intermediate for the synthesis of levofloxacin, and levofloxacin (levofxcain, DR-3355) is the S-type levorotatory optical isomer of ofloxacin ofloxacin, and its antibacterial activity is the latter. Twice as much as that of quinolones, with less toxic and side effects and high water solubility, it is one of the excellent broad-spectrum antibacterial drugs among quinolones. The antibacterial activity of levofloxacin is 8 to 128 times that of the enantiomer, and the effective rate against intestinal infection and gonococcal infection is 100%. It is one of the bulk drugs currently used cli...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J32/00B01J37/02B01J37/16C07C215/08C07C213/00C01B25/30
CPCB01J23/462B01J32/00B01J37/0207B01J37/16C01B25/30C07C213/00C07C215/08
Inventor 严新焕汤伟伟
Owner ZHEJIANG UNIV OF TECH
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