Active carbon immobilized imidazole ionic liquid, preparation method thereof and application thereof

A technology for immobilizing imidazoles and ionic liquids, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of easy loss of ionic liquids, and achieve easy loss, adjustable adsorption performance and catalytic performance, The effect of easy recycling

Inactive Publication Date: 2012-06-27
FUJIAN AGRI & FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The object of the present invention is to provide a kind of activated carbon immobilized imidazole ionic liquid and its preparation method and application, the present invention firmly chemically bonds the imidazole ionic liquid on the activated carbon, strengthens the binding force between the ionic liquid and the activated carbon, and solves the problem of Solved the problem of easy loss of ionic liquid in the traditional physical impregnation loading method

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  • Active carbon immobilized imidazole ionic liquid, preparation method thereof and application thereof
  • Active carbon immobilized imidazole ionic liquid, preparation method thereof and application thereof

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preparation example Construction

[0014] The preparation method of activated carbon immobilized imidazole ionic liquid of the present invention comprises the preparation of activated carbon, the modification of activated carbon, the silylation of modified activated carbon, the immobilization of imidazole ionic liquid; specifically comprises the steps:

[0015] 1) Preparation of activated carbon: take plant carbon source materials (such as fruit shells, sawdust, etc.) ;

[0016] 2) Modification of activated carbon: mix the carbon powder with 2 mol / L nitric acid solution at a mass (g) to volume (ml) ratio of 1:10, and carry out the process in a constant temperature water bath shaker at 50°C for 2 to 5 hours modified with nitric acid, the sample was repeatedly washed with deionized water until neutral, and dried at 105°C for 24 hours before use.

[0017] 3) Silylation of modified activated carbon: Mix modified activated carbon with 0.1mol / L silane coupling agent (for example: chloropropyltriethoxysilane, chlorop...

Embodiment 1

[0020] A kind of preparation method of gac-immobilized imidazolium ionic liquid, comprises the following steps:

[0021] 1) Put the sawdust in a temperature-programmed furnace at 400°C for 3 hours, and crush it to 0.105㎜~0.074㎜ to get carbon powder for later use;

[0022] 2) Mix the carbon powder with 2 mol / L nitric acid solution at a mass (g) to volume (ml) ratio of 1:10, carry out nitric acid modification at 50°C for 4 hours in a constant temperature water bath shaker, and use Repeatedly wash the sample with ion water to neutrality, dry it at 105°C for 24 hours before use;

[0023] 3) Mix the modified activated carbon with the cyclohexane solution of 0.1mol / L chloropropyltriethoxysilane at a mass (g) to volume (ml) ratio of 1:12, under nitrogen protection, sealing, ultrasonic power 50W , Ultrasonic oscillation at 60°C for 2h, cyclohexane Soxhlet extraction of the sample for 8h, vacuum drying at 105°C for 24h to obtain silylated activated carbon;

[0024] 4) Mix silylated m...

Embodiment 2

[0026] A kind of preparation method of gac-immobilized imidazolium ionic liquid, comprises the following steps:

[0027] 1) Put the sawdust in a temperature-programmed furnace for carbonization at 300°C for 4 hours, and crush it to 0.105㎜~0.074㎜ to obtain carbon powder for later use;

[0028] 2) Mix the carbon powder with 2 mol / L nitric acid solution at a mass (g) to volume (ml) ratio of 1:10, carry out nitric acid modification at 50°C for 5 hours in a constant temperature water bath shaker, and use Repeatedly wash the sample with ion water to neutrality, dry it at 105°C for 24 hours before use;

[0029] 3) Mix the modified activated carbon with the cyclohexane solution of 0.1mol / L chloropropyltrimethoxysilane at a mass (g) to volume (ml) ratio of 1:12, under nitrogen protection, sealing, ultrasonic power 150W, Ultrasonic oscillation at 60°C for 1h, cyclohexane Soxhlet extraction of the sample for 8h, vacuum drying at 105°C for 24h to obtain silylated activated carbon;

[00...

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Abstract

The invention discloses an active carbon immobilized imidazole ionic liquid, a preparation method thereof and an application thereof. The active carbon immobilized imidazole ionic liquid is obtained through immobilizing an imidazole ionic liquid on the surface of active carbon by a silane coupling agent. The preparation method comprises the following steps: preparing the active carbon, modifying the active carbon, silanizing the modified active carbon, and immobilizing the imidazole ionic liquid. According to the invention, the imidazole ionic liquid is firmly and chemically bonded on the active carbon, so the binding force between the ionic liquid and the active carbon is enhanced, thereby a problem of easy loss of the ionic liquid of traditional physical dipping load methods is solved. The prepared active carbon immobilized imidazole ionic liquid which can be applied to the adsorbing separation of a carbon dioxide, hydrogen sulfide, benzene and formaldehyde gas can also be used as acatalyst for a liquid phase chemical reaction, and has the advantages of adjustable adsorption performance and catalytic performance, easy recycle, environmental protection and the like.

Description

technical field [0001] The invention relates to an activated carbon-immobilized imidazole ionic liquid and a preparation method and application thereof, belonging to the field of preparation of catalytic materials. Background technique [0002] Imidazole-based ionic liquid is a new type of green solvent or catalyst, which is expected to be widely used in gas separation, industrial catalysis, analytical chemistry and other fields. However, the high synthesis cost and high viscosity of imidazole ionic liquids severely limit its wide application in industrial fields. Therefore, researchers envisage immobilizing imidazole-based ionic liquids on some traditional porous carriers to prepare immobilized imidazole-based ionic liquids, which can improve the utilization rate and recovery performance of ionic liquids, thereby breaking through the above-mentioned application limitations. At present, silica or silica gel immobilized imidazole ionic liquids have been developed and the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J31/02C02F1/28B01D53/02A61L9/16
CPCY02W10/37
Inventor 卢泽湘范立维黄彪
Owner FUJIAN AGRI & FORESTRY UNIV
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