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

A template method for preparing a catalyst for hydrogenation of anthraquinone to produce hydrogen peroxide

A catalyst and anthraquinone technology are applied in the field of preparation of catalysts for hydrogenation of anthraquinone to produce H2O2, and achieve the effects of high anthraquinone recycling rate, cheap and readily available raw materials, and high hydrogenation efficiency

Inactive Publication Date: 2019-10-11
WUHAN UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no γ-Al 2 o 3 Made into graded spheres and used as a carrier for palladium catalysts

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A template method for preparing a catalyst for hydrogenation of anthraquinone to produce hydrogen peroxide
  • A template method for preparing a catalyst for hydrogenation of anthraquinone to produce hydrogen peroxide
  • A template method for preparing a catalyst for hydrogenation of anthraquinone to produce hydrogen peroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Preparation of MCH

[0047] Add 50mL of 95% ethanol into the three-necked flask, seal and heat to 60°C, then add 0.024molMgCl 2 ·6H 2 O and 0.048mol NH 4 HCO 3 Dissolve in 60mL pure water, heat to 60°C, and then stir MgCl at 60r / min 2 –NH 4 HCO 3 Quickly add the mixed aqueous solution into the three-necked flask, continue to stir at 60r / min for 10min at 60°C, let it stand for 1h, filter the obtained white solid with pure water for three times, then disperse it in 120mL pure water, keep it warm at 80°C for 2h, and then filter Alternately washed three times with pure water and ethanol, and finally air-dried at 60°C for 4 hours to obtain MCH.

[0048] (2)γ-Al 2 o 3 Preparation of microspheres

[0049] Get 0.3gMCH and disperse in 20mL 95% ethanol, add 10mL of Al(NO 3 ) 3 The ethanol solution (0.5mol / L), continued to stir at 50r / min for 30min, then transferred to a hydrothermal kettle and heated at 120°C for 18h, filtered the obtained precipitate with ethanol ...

Embodiment 2

[0057] (1) Preparation of MCH

[0058] MCH was prepared by the method of step (1) of Example 1.

[0059] (2)γ-Al 2 o 3 Preparation of microspheres

[0060] Get 0.3gMCH and disperse in 20mL 95% ethanol, add 10mL of Al(NO 3 ) 3 The ethanol solution (0.5mol / L), continued to stir at 50r / min for 30min, then transferred to a hydrothermal kettle and heated at 150°C for 12h, filtered the obtained precipitate with ethanol for three times, and dried it at 60°C for 4h to obtain Al 2 o 3 The precursor was ground with a mortar and then calcined at 500°C in a static air atmosphere for 4h with a heating rate of 2°C / min to obtain γ-Al 2 o 3 microsphere powder.

[0061] (3) Preparation of Pd supported catalyst

[0062] The active component Pd- was loaded by equal volume impregnation method. Take γ-Al 2 o 3 Microsphere powder 0.6g is used as a carrier, and 0.003gPdCl is weighed according to the Pd-loading capacity of 0.3wt%. 2 Dissolve 0.002gNaCl in 0.6g carrier corresponding satur...

Embodiment 3

[0066] (1) Preparation of MCH

[0067] MCH was prepared by the method of step (1) of Example 1.

[0068] (2)γ-Al 2 o 3 Preparation of microspheres

[0069] Get 0.3gMCH and disperse in 20mL 95% ethanol, add 10mL of Al(NO 3 ) 3 The ethanol solution (0.5mol / L), continue to stir at 50r / min for 30min, then transfer to a hydrothermal kettle and heat at 180°C for 8h, filter and wash the obtained precipitate with ethanol three times, and dry it by blowing at 60°C for 4h to obtain Al 2 o 3 The precursor was ground with a mortar and then calcined at 500°C in a static air atmosphere for 4h with a heating rate of 2°C / min to obtain γ-Al 2 o 3 microsphere powder.

[0070] (3) Preparation of Pd supported catalyst

[0071] The active component Pd- was loaded by equal volume impregnation method. Take 0.6g γ-Al 2 o 3 Microsphere powder is used as a carrier, and 0.002gPdCl is weighed according to the Pd-loading capacity of 0.2wt%. 2 Dissolve 0.0013gNaCl in 0.6g carrier corresponding...

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
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a template method for preparing a catalyst for hydrogenating anthraquinone to produce hydrogen peroxide. The steps are: (1) Add ethanol to the three-neck flask, and then add MgCl 2 -NH 4 HCO 3 Mix the solution, stir and let it stand, filter and wash the white solid obtained with pure water, disperse it in pure water and keep it warm, filter it, wash it alternately with pure water and ethanol, and dry it to obtain Mg 5 (CO 3 ) 4 (OH) 2 ·4H 2 O, referred to as MCH; (2) Disperse MCH into ethanol, add Al(NO 3 ) 3 The ethanol solution is heated with water, filtered and washed with ethanol, dried and roasted to obtain γ-Al 2 O 3 Microsphere powder; (3) prepared with γ-Al 2 O 3 As a carrier, the active component Pd- is loaded using an equal volume impregnation method, and then the catalyst is obtained by washing, drying and roasting. The catalyst has high hydrogenation efficiency in the anthraquinone hydrogenation reaction, and the highest anthraquinone recycling recovery rate is 96.9%.

Description

technical field [0001] The invention belongs to the hydrogenation of anthraquinone to produce H 2 o 2 In the field of preparation of catalysts, specifically related to graded mesoporous Al 2 o 3 The preparation method of microsphere and its application in the preparation of anthraquinone method to produce H 2 o 2 The application of the palladium catalyst used. Background technique [0002] h 2 o 2 The chemical name is hydrogen peroxide, commonly known as hydrogen peroxide, which is a compound formed by the covalent bonding of hydrogen and oxygen. Its products are widely used in chemical synthesis, printing and dyeing, metallurgy, circuit board etching and food production and processing. h 2 o 2 The synthesis methods of the compound include acid hydrolysis peroxide method, electrolysis method, isopropanol method, anthraquinone method and direct synthesis method of hydrogen and oxygen. 99% of the world's H 2 o 2 Synthesis by anthraquinone method and direct hydroge...

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 Patents(China)
IPC IPC(8): B01J23/44C01B15/023C01F7/30
CPCC01B15/023C01F7/308B01J23/44B01J35/51B01J35/63B01J35/647B01J35/615
Inventor 蔡卫权王昕
Owner WUHAN UNIV OF TECH