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Alkynol selective hydrogenation catalyst as well as preparation method and application thereof

A hydrogenation catalyst and selective technology, which is applied in the direction of hydrogenation preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy phase separation and uneven distribution of composite materials, and achieve high catalytic activity and large-scale industrial Application value, effect of structural stability

Active Publication Date: 2019-02-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite materials obtained by these methods are often unevenly distributed, and the metal oxides and carbon materials are easy to separate phases.

Method used

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  • Alkynol selective hydrogenation catalyst as well as preparation method and application thereof
  • Alkynol selective hydrogenation catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Weigh 1g of carboxymethyl chitin and disperse it in 50ml of water, add 1g of F127 and stir evenly, then add 1g of indium nitrate hydrate and 1ml of nitric acid and mix evenly, stir until dry at 80°C; then, transfer to a 30ml crucible and place in a nitrogen furnace The specific calcination process is as follows: heat up to 1000 ℃ at 5 ℃ / min, and calcine at 1000 ℃ for 1 hour; then, cool down to room temperature naturally, and grind the calcined mixture to obtain highly dispersed indium oxide composite nitrogen-doped Heteroporous carbon materials.

[0054] Weigh 1g of highly dispersed indium oxide composite nitrogen-doped porous carbon material, add it to 60mL of deionized water, slowly add 1mL of 10mg / mL PdCl 2 solution, stirred at 50°C for 12h, dried in an oven at 70°C for 24h, calcined in air at 200°C for 1h, and reduced with hydrogen at 300°C for 1h (hydrogen flow rate: 50mL / min, heating rate: 5°C / min) to obtain acetylenic alcohol selection hydrogenation catalyst.

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Embodiment 2

[0057] Weigh 1g of carboxymethyl chitosan and disperse it in 50ml of water, add 1g of F127 and stir evenly. Then add 1g of indium nitrate hydrate and 1ml of nitric acid, mix well, and stir until dry; then, transfer to a 30ml crucible, and perform calcination in a nitrogen furnace. Calcination at ℃ for 1h; then, cool down to room temperature naturally. The calcined mixture is pulverized to obtain a high-dispersion indium oxide composite nitrogen-doped carbon material.

[0058] Weigh 1g of highly dispersed indium oxide composite nitrogen-doped carbon material, add it to 60mL of deionized water, slowly add 1mL of 10mg / mL PdCl 2 The solution was stirred at 50°C for 12 hours, dried in an oven at 70°C for 24 hours, and reduced with hydrogen at 300°C for 1 hour (heating rate 5°C / min) to obtain the acetylenic alcohol selective hydrogenation catalyst.

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Abstract

The invention discloses a preparation method of an alkynol selective hydrogenation catalyst. The preparation method comprises the following steps: (1), agitating and mixing a nitrogen-containing biomass with a surfactant, next adding an indium-containing metallic salt and acid liquor, mixing uniformly, and then performing drying and high-temperature calcination to obtain an indium oxide compoundednitrogen-doped porous carbon material; and (2), impregnating the indium oxide compounded nitrogen-doped porous carbon material in a Pd precursor solution, and then performing agitation, oven-drying,calcination and hydrogen reduction treatment in sequence to obtain the alkynol selective hydrogenation catalyst. The invention also discloses the alkynol selective hydrogenation catalyst prepared by the preparation method and application of the alkynol selective hydrogenation catalyst to an alkynol selective hydrogenation reaction in a vitamin industrial chain. The preparation method is simple; the prepared alkynol selective hydrogenation catalyst is compact in structure; nano particles of a Pd-In alloy are highly dispersed; and the alkynol selective hydrogenation catalyst has excellent catalytic performance.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a selective hydrogenation catalyst for acetylenic alcohols and a preparation method thereof, and the application of the selective hydrogenation catalyst for acetylenic alcohols in the selective hydrogenation reaction of acetylenic alcohols in the vitamin industry chain. Background technique [0002] Vitamins are a type of trace organic substances that humans and animals must obtain from food in order to maintain normal physiological functions, and play an important role in the growth, metabolism, and development of the human body. The proportion of synthetic vitamins in vitamin production is increasing year by year, and the selective hydrogenation reaction of acetylenic alcohols is one of the most important reactions in vitamin production. Supported Pd catalysts are commonly used in this reaction. At present, the catalyst for the hydrogenation reaction of acetyleni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J35/10C07C33/03C07C29/17C07C33/02C07C33/14
CPCC07C29/17B01J27/24C07C2601/16B01J35/394B01J35/393B01J35/615C07C33/03C07C33/02C07C33/14
Inventor 王勇王哲毛善俊陈益庆赵博文
Owner ZHEJIANG UNIV
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