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Ionic liquid catalyst of selenium anion loaded by silica gel, process for preparing same and use thereof

A technology for ionic liquids and catalysts, which is applied to ionic liquid catalysts containing selenium-containing anions on silica gel and its preparation and application fields. It can solve the problems of restricting widespread reference, large amount of ionic liquids, and high costs, and achieve cost reduction and energy consumption reduction. , not easy to lose the effect

Inactive Publication Date: 2007-07-04
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ruthenium, rhodium, palladium, and gold catalytic systems are relatively expensive due to their noble metals, which limits their wide application; although selenium is cheap, its catalytic performance is also relatively low
[0005] Although the ionic liquid containing specific metal selenium anion has shown higher catalytic activity (Hoon Sik Kim, Yong Jin Kim, et al, Angew.Chem.Int.Ed.2002, 41 (22) 4300- 4303), but there is a problem that the amount of ionic liquid is too large and the cost is high

Method used

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  • Ionic liquid catalyst of selenium anion loaded by silica gel, process for preparing same and use thereof
  • Ionic liquid catalyst of selenium anion loaded by silica gel, process for preparing same and use thereof
  • Ionic liquid catalyst of selenium anion loaded by silica gel, process for preparing same and use thereof

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Experimental program
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Effect test

Embodiment 1

[0028] Get porous silica material (specific surface 538m 2 / g, pore diameter 5.4nm, pore volume 0.834cm 3 / g) 1g, add 10ml hydrochloric acid (12mol / l), stir at room temperature for 12 hours, filter, wash with absolute ethanol and toluene, dry at 80°C, transfer to a 100ml Erlenmeyer flask, add selenium-containing Anionic Ionic Liquid RMImSeO 2 (OCH 3 )(RMIm=1-(CH 2 ) 3 Si(OEt) 3 -3-Methylimidazole) 2g, 20ml toluene, reflux at 90°C for 24 hours, filter, wash, dry, porous material silica bonded loaded RMImSeO 2 (OCH 3 ) ionic liquid catalyst a. The content of selenium analyzed by IRIS was 2.70%.

Embodiment 2

[0030] Step is with implementation example 1, but with ionic liquid [RMIm] [SeO 2 (OC 2 h 5 )] instead of [RMIm][SeO 2 (OCH 3 )] (RMIm=1-(CH 2 ) 3 Si(OEt) 3 -3-methylimidazole), [RMIm][SeO 2 (OC 2 h 5)] ionic liquid catalyst b. The content of selenium analyzed by IRIS is 2.65%

Embodiment 3

[0032] Step is with implementation example 1, but with ionic liquid [RMIm] [SeO 2 (OC 3 h 7 )] instead of [RMIm][SeO 2 (OCH 3 )] (RMIm=1-(CH 2 ) 3 Si(OEt) 3 -3-Methylimidazole) porous material silica bonded loaded [RMIm][SeO 2 (OC 3 h 7 )] ionic liquid catalyst c. The content of selenium analyzed by IRIS is 2.57%

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Abstract

The invention relates to a silicone impregnated Se anion and the ionic liquid catalyst preparation methods and application. Bonding the containing selenium ionic liquid on the porous silica gel prepared with ionic liquid as mold agent to preparing accelerating agent. The catalyst can under the condition of 100-120 degreeC, 3MPa-6MPa pressure catalyze Aromatic amine to make corresponding carbamate. The catalyst was characterized by high activity, supported by the carrier of silica can be adjusted, reducing the amount of ionic liquid, effectively lowering the cost of the catalyst.

Description

technical field [0001] The invention relates to an ionic liquid catalyst carrying selenium-containing anions on silica gel, a preparation method and application thereof. Background technique [0002] Room temperature ionic liquids refer to salts that are liquid at room temperature or near room temperature, mainly composed of organic cations and inorganic or organic anions. Their main features are: non-volatile or zero vapor pressure, low melting point, wide liquid range, strong electrostatic field, wide electrochemical window, good ionic conductivity and thermal conductivity, high heat capacity and thermal energy storage density, high thermal conductivity Stability, good solubility for various organic and inorganic materials, and designability. These unique advantages make ionic liquids as environmentally friendly "clean" solvents and new catalytic systems are being accepted and paid attention to by the catalysis circles and petrochemical enterprises all over the world, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J35/10B01J37/00C07C269/04C07C271/06
Inventor 邓友全马昱博石峰何昱德
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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