Unlock instant, AI-driven research and patent intelligence for your innovation.

Porous rhenium catalyst and application method thereof

A technology of catalysts and additives, applied in the field of porous rhenium catalysts, which can solve the problems of low catalytic yield and achieve the effects of good catalytic activity, stable performance and controllable pore size

Pending Publication Date: 2022-02-11
洛阳双罗铼材料科技有限公司
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional rhenium catalysts are mostly non-porous solids or rhenium-containing liquids. Non-porous solids have a small contact area during the catalysis process, and the catalytic yield will be very low, while liquid rhenium-containing catalysts belong to homogeneous catalysis. There are certain drawbacks in the separation of the product of the product, so it is particularly important to develop a porous rhenium-containing solid catalyst

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Synthesis of Porous Rhenium Catalysts:

[0016] Add 8 parts of ionic liquid 1-octyl-3-methylimidazolium chloride salt, 2 parts of water, 0.5 parts of TEOS, and 4% magnesium chloride into the reaction kettle, stir and mix evenly at 25°C under normal pressure, and then add 0.3 parts of ammonium rhenate was added to the mixture, and the mixture was stirred at 70°C for 30 minutes, and then cooled to room temperature to form a porous gel, which was stable for 48 hours until TEOS was completely hydrolyzed; water and ethanol were added to wash repeatedly 3 times to obtain a porous rhenium catalyst.

[0017] Application in the deoxygenation and dehydration reaction of alcohols:

[0018] Mix 1 part of the above-mentioned porous rhenium catalyst, 30 parts of toluene and 3 parts of 1,2-octanediol in the reactor, connect the condensing reflux device, react in ultrasonic, heat up to 40 ° C, react for 6 hours, stop the reaction, the system After cooling down to room temperature, sol...

Embodiment 2

[0020] Synthesis of Porous Rhenium Catalysts:

[0021] Add 7 parts of ionic liquid 1-octyl-3-methylimidazolium chloride salt, 3 parts of water, 0.5 part of TEOS, and 4% calcium chloride into the reaction kettle, stir and mix evenly at 25°C under normal pressure, and then Add 0.5 parts of ammonium rhenate to the system, stir the mixture at 80°C for 40 minutes, then cool down to room temperature to form a porous gel and stabilize it for 36 hours until TEOS is completely hydrolyzed, add water and ethanol to wash repeatedly 3 times, and obtain a porous rhenium catalyst.

[0022] Application in the deoxygenation and dehydration reaction of alcohols:

[0023] Mix 1 part of the above-mentioned porous rhenium catalyst, 30 parts of toluene and 4 parts of 1,2-octanediol into the reactor, connect the condensing reflux device, react in ultrasonic, heat up to 50°C, react for 5 hours, and stop the reaction. The temperature of the system was lowered to room temperature, solid-liquid separat...

Embodiment 3

[0025] Synthesis of porous rhenium materials:

[0026] Add 6 parts of ionic liquid 1-octyl-3-methylimidazolium chloride salt, 4 parts of water, 0.5 part of TEOS, 2% of magnesium chloride and 2% of calcium chloride into the reactor, at 25°C under normal pressure, Stir and mix evenly, then add 0.4 parts of ammonium rhenate to the system, stir the mixture at 60°C for 30 minutes, then cool down to room temperature to form a porous gel and stabilize it for 24 hours until TEOS is completely hydrolyzed. Water and ethanol were added to wash repeatedly 4 times to obtain a porous rhenium catalyst.

[0027] Application in the deoxygenation and dehydration reaction of alcohols:

[0028] Mix 1 part of the above-mentioned porous rhenium catalyst, 30 parts of toluene and 4 parts of 1,2-octanediol into the reactor, connect the condensing reflux device, react in ultrasonic, heat up to 45°C, react for 4 hours, and stop the reaction. The temperature was lowered to room temperature, solid-liqui...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of organic synthesis, and particularly relates to a porous rhenium catalyst, which is prepared by the following steps: adding a proper amount of ionic liquid, water, TEOS and an auxiliary agent into a reaction kettle, uniformly stirring and mixing under the normal pressure condition of 20-30 DEG C, then adding ammonium rhenate into the system, stirring the mixture for 30-60 minutes at 50-80 DEG C, and then cooling to room temperature to form porous gel, and stabilizing for 24-48 hours until TEOS is completely hydrolyzed; and adding water and ethanol to repeatedly wash for multiple times to obtainthe porous rhenium catalyst. The porous rhenium catalyst shows good catalytic activity when being applied to alcohol deoxidation and dehydration reaction. The porous rhenium catalyst is used as the catalyst, the synthesis method is simple, the reaction is green and pollution-free, the catalyst can be recycled, the environment is protected, and the catalysis cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of organic synthesis, and in particular relates to a porous rhenium catalyst and an application method thereof. Background technique [0002] Ionic liquids are room temperature molten salts composed of anions and cations with a melting point lower than 100°C, and have been one of the research hotspots in the past ten years. Studies have shown that ionic liquids have many unique physical and chemical properties, such as low vapor pressure (almost zero), non-flammability, good thermal stability, high electrical conductivity, wide electrochemical window, large heat capacity, wide liquid range, strong solubility, etc. . In addition, ionic liquids have the advantages of ordered local structure, adjustable properties from hydrophilic to hydrophobic, and can be recycled repeatedly. More importantly, ionic liquids are designable. According to experimental needs, ionic liquids with special functions can be prepared by changi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/36B01J35/10C07C1/24C07C11/02
CPCB01J23/36C07C1/24B01J35/60C07C11/02Y02P20/584
Inventor 房大维宋宗仁杨淑敏张渝阳齐笑晨曾中方
Owner 洛阳双罗铼材料科技有限公司