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A preparation method of porous carbon-nitrogen material-supported nano-bimetallic catalyst and its application method in benzoic acid hydrogenation reaction

A bimetallic catalyst and porous carbon technology, applied in the direction of catalyst activation/preparation, ozone oxidation to prepare carboxylic acid, nanotechnology for materials and surface science, etc., can solve the problem of noble metal catalyst deactivation, inconvenience, and difficult separation of catalyst and product And other issues

Active Publication Date: 2021-06-29
WEIFANG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These catalysts play a key role in various hydrogenation synthesis processes, but there are also some problems: the catalyst is difficult to separate from the product, and it is not easy to recycle; the noble metal catalyst is easily deactivated by organic sulfur and organic nitrogen poisoning; the catalytic activity of metal sulfide inferior
[0005] In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve

Method used

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  • A preparation method of porous carbon-nitrogen material-supported nano-bimetallic catalyst and its application method in benzoic acid hydrogenation reaction
  • A preparation method of porous carbon-nitrogen material-supported nano-bimetallic catalyst and its application method in benzoic acid hydrogenation reaction
  • A preparation method of porous carbon-nitrogen material-supported nano-bimetallic catalyst and its application method in benzoic acid hydrogenation reaction

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preparation example Construction

[0033] A kind of porous carbon-nitrogen material supported nano bimetallic catalyst, its preparation method comprises the steps:

[0034] Step 1, preparation of biomass-based porous carbon-nitrogen carrier material;

[0035] (1) Pretreatment: Take loofah vines, air dry them naturally, remove leaves and leave stems, first rinse with tap water 2 to 3 times to remove contaminated dust, soil and other large particles visible to the naked eye; then soak in 2% detergent for 10 ~ After soaking for 20 minutes, rinse with tap water 3 times, 12-18 minutes each time; then blanched with boiling water at 100°C for 1-2 minutes; finally rinsed with deionized water 3 times, 1-2 minutes each time; Cut into sections, bake in a constant temperature drying oven at 90°C for 30 hours to remove free water in the material; after drying, crush, pass through a 17-19 mesh standard sieve, and pack into bags for later use.

[0036] (2) High-temperature pyrolysis: Weigh 3 g of pretreated raw materials, pl...

Embodiment 1

[0045] (1) Pretreatment: take loofah vines, air dry them naturally, remove leaves and keep stems, first rinse twice with tap water to remove contaminated dust, soil and other large particles visible to the naked eye; then soak in 2% detergent for 15 minutes, soak Then rinse with tap water for 3 times, each time for 15 minutes; then blanched with 100°C boiling water for 1 minute; finally, rinse with deionized water for 3 times, each time for 1 minute; cut the above-mentioned rinsed materials into sections, and place them at 90°C In a constant temperature drying oven, bake for 30 hours to remove free water in the material; after drying, crush, pass through a 18-mesh standard sieve, and bag for later use.

[0046] (2) High-temperature pyrolysis: Weigh 3 g of pretreated raw materials, place them in a tube furnace, and blow nitrogen (N 2 The flow rate was 100 sccm), and the temperature was programmed to 800 °C; after 800 °C constant temperature carbonization for 2 h, the temperatur...

Embodiment 2

[0050] (1) Pretreatment: take loofah vines, air dry them naturally, remove leaves and keep stems, first rinse twice with tap water to remove contaminated dust, soil and other large particles visible to the naked eye; then soak in 2% detergent for 15 minutes, soak Then rinse with tap water for 3 times, each time for 15 minutes; then blanched with 100°C boiling water for 1 minute; finally, rinse with deionized water for 3 times, each time for 1 minute; cut the above-mentioned rinsed materials into sections, and place them at 90°C In a constant temperature drying oven, bake for 30 hours to remove free water in the material; after drying, crush, pass through a 18-mesh standard sieve, and bag for later use.

[0051] (2) High-temperature pyrolysis: Weigh 3 g of pretreated raw materials, place them in a tube furnace, and blow nitrogen (N 2 The flow rate was 100 sccm), and the temperature was programmed to 900 °C; after carbonization at a constant temperature of 900 °C for 2 h, the te...

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Abstract

The present invention is applicable to the technical field of catalysts, and provides a method for preparing a porous carbon-nitrogen material-supported nano-bimetallic catalyst, including step 1, preparation of a biomass-based porous carbon-nitrogen carrier material; pretreatment, high-temperature pyrolysis, cleaning and drying, Grinding; Step 2, preparation of porous carbon-nitrogen loaded Fe / CoS2 / HCCS nano-bimetallic catalyst; a method for using porous carbon-nitrogen material-loaded nano-bimetallic catalyst in benzoic acid hydrogenation reaction, benzoic acid, solvent and porous The mixture of carbon-nitrogen material-loaded nanometer bimetallic catalysts is sealed in a reaction kettle for reaction. Thereby, the invention can enhance the dispersibility of the catalyst in the reaction solvent, increase the active sites of the carbon material, enhance the activity of the catalyst synergistically with the double metal, and increase the product yield.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a preparation method of a porous carbon-nitrogen material-loaded nanometer bimetallic catalyst and a method for using it in the hydrogenation reaction of benzoic acid. Background technique [0002] Cyclohexanecarboxylic acid and its derivatives are widely used in all walks of life, especially nowadays, pharmaceutical and chemical products are becoming more and more important to people's lives. The economical and efficient synthesis of cyclohexanecarboxylic acid and its derivatives has high significance and value . [0003] It is well known that the selective benzene ring hydrogenation of benzoic acid is the most direct and effective method for the synthesis of cyclohexanecarboxylic acid. However, because the hydrogenation of benzoic acid needs to overcome the high resonance energy of the benzene ring, the hydrogenation of benzoic acid is much more difficult than the reduction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J27/043B01J37/08B01J37/16B01J35/10B82Y30/00B82Y40/00C07C51/36C07C61/08
CPCB01J27/043B01J27/24B01J35/0013B01J35/1014B01J35/1038B01J35/1061B01J35/1066B01J37/082B01J37/16B82Y30/00B82Y40/00C07C51/36C07C2601/14C07C61/08
Inventor 张姗姗李成杰张英超冯丽娟刘燕峰于磊
Owner WEIFANG UNIV OF SCI & TECH
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