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Preparation of a highly active ruthenium catalyst and its application in catalytic hydrogenation at room temperature

A ruthenium catalyst, a technology for catalytic hydrogenation, applied in the preparation of organic compounds, hydrogenation preparation, preparation of carboxylic acid by ozone oxidation, etc., can solve the problems of complex preparation methods, harsh reaction conditions, low selectivity, etc., and achieve simple preparation and selectivity. High sexual and active effect

Active Publication Date: 2020-08-18
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite all these efforts, the reported catalysts exhibit low selectivities for the hydrogenation of highly reactive benzyl ethers and related derivatives
The traditional nickel and cobalt catalysts have low activity, while the reported ruthenium and palladium catalysts have high activity, but the preparation method is complicated and the operation is very difficult. The catalyst needs to be stored under specific conditions to play a role, and the reaction conditions are very harsh. Basically difficult to apply in industry

Method used

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  • Preparation of a highly active ruthenium catalyst and its application in catalytic hydrogenation at room temperature
  • Preparation of a highly active ruthenium catalyst and its application in catalytic hydrogenation at room temperature
  • Preparation of a highly active ruthenium catalyst and its application in catalytic hydrogenation at room temperature

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: Preparation of 10% Ru / α-Al 2 o 3

[0030] (1) According to the mass percentage, weigh 0.228g ruthenium precursor ruthenium trichloride hydrate (RuCl 3 ·xH 2 O) in a beaker, add an appropriate amount of deionized water to dissolve, ultrasonic 5-15min until completely dissolved and evenly dispersed;

[0031] (2) Weigh 1g of α-Al 2 o 3 , added to a beaker filled with ruthenium trichloride aqueous solution, stirred with a glass rod until toothpaste or paste, and then ultrasonicated for 15-30min;

[0032] (3) After the ultrasonication is completed, cover the mouth of the beaker with tinfoil, put it in a vacuum drying oven, and immerse at room temperature for 24 hours;

[0033] (4) After the impregnation is completed, place it in an oven and dry it at 105°C for 12 hours;

[0034] (5) After drying to remove moisture, grind the obtained solid into powder, and then calcinate at 300°C for 3 hours in an argon atmosphere of 60mL / min. After the calcination is compl...

Embodiment 2

[0035] Example 2: Preparation of 7% Ru / α-Al 2 o 3

[0036] The difference from Example 1 is that the amount of ruthenium trichloride hydrate used is 0.155 g.

Embodiment 3

[0037] Example 3: Preparation of 13% Ru / α-Al 2 o 3

[0038] Different from Example 1, the usage amount of ruthenium trichloride hydrate is 0.307g.

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Abstract

The invention discloses preparation of a high-activity ruthenium catalyst and application of the high-activity ruthenium catalyst in room-temperature catalytic hydrogenation. According to the preparation, ruthenium trichloride hydrate is used as a precursor, alpha-Al2O3 is used as a carrier, and an immersion method is adopted to synthesize the high-activity ruthenium catalyst Ru / alpha-Al2O3; the catalyst can efficiently catalyze hydrogenation of various reactants at room temperature when isopropanol is used as a solvent, the selectivity on the product is 100%, and the yield is high. The catalyst disclosed by the invention is simple to prepare and low in cost and has a relatively good application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and relates to the preparation and application of a ruthenium catalyst, in particular to the preparation of a highly active ruthenium catalyst and its application in catalytic hydrogenation at room temperature. Background technique [0002] Selective hydrogenation of (hetero)aromatics represents an essential process in the chemical industry, especially for the production of polymer intermediates and a variety of fine chemicals. Selective hydrogenation of biomass-derived aromatics such as lignin plays a pivotal role in the development of new sustainable feedstocks for chemical production and remains a notorious difficulty to date. Although the hydrogenation of arene rings of lignin building blocks is well known, there are few reports on the development of catalysts for the selective formation of cycloaliphatic ethers from such compounds. [0003] Ruthenium nanoparticles represent a s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46C07C41/20C07C43/184C07C43/115C07C5/10C07C13/18C07C13/50C07C29/19C07C35/08C07C67/303C07C69/75C07C51/36C07C61/08
CPCB01J23/462C07C5/10C07C29/19C07C41/20C07C51/36C07C67/303C07C2601/14C07C2602/28C07C43/184C07C43/115C07C13/18C07C13/50C07C35/08C07C69/75C07C61/08
Inventor 曹景沛江玮赵小燕冯惠谢涛朱陈冯晓博
Owner CHINA UNIV OF MINING & TECH