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Aluminum oxide carrier, and preparation method and application

A technology of alumina support and total pore volume, which is applied in the direction of catalyst support, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problem of unfavorable active component dispersion and hydrogenation product release, active component cannot be fully utilized, heat cannot Timely derivation and other issues to achieve excellent anti-coke performance, accelerated diffusion and heat transfer, and large specific surface area

Active Publication Date: 2017-06-20
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These catalysts usually only contain a single pore structure, and often the pore size is small, which is not conducive to the dispersion of active components and the removal of hydrogenation products
On the one hand, the active components cannot be fully utilized, and the hydrogenation effect is not ideal; on the other hand, the heat generated during the hydrogenation reaction cannot be exported in time, resulting in local overheating of the catalyst, aggravated carbon deposition, and deactivation of the catalyst

Method used

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  • Aluminum oxide carrier, and preparation method and application
  • Aluminum oxide carrier, and preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (a) Take the bagasse, wash it with water to remove the residual sugar, and dry it. Get 4g of sodium hydroxide, add 96g of deionized water, configure a concentration of 4wt% sodium hydroxide solution, 25g of bagasse with 50mL of the above solution, stir and place them together in a stainless steel reaction kettle with a polytetrafluoroethylene lining. Hydrothermally treat at 160°C for 3 hours, take it out after cooling down, wash with water until neutral, and dry for later use. (b) Take 100g of acidic aluminum salt, aluminum chloride, 5g of bagasse and 1g of sodium dihydrogen phosphate, add 500mL of deionized water, stir evenly, ultrasonically treat for 30min, and then mix 50g of sodium metaaluminate with The salt solution made of 500mL deionized water and the above acidic aluminum salt solution were mixed in parallel to form a gel, and the alkaline precipitating agent sodium carbonate was added to adjust the pH value of the system to 6, aged at 50°C for 3 hours, and was...

Embodiment 2

[0031](a) Take the bagasse, wash it with water to remove the residual sugar, and dry it. Get 6g of sodium hydroxide, add 94g of deionized water, configure 6wt% sodium hydroxide solution, 25g bagasse with 75mL of the above solution, stir evenly and place them together in a stainless steel reaction kettle with a polytetrafluoroethylene lining. Hydrothermal treatment at 170°C for 5 hours, take it out after cooling down, wash with water until neutral, and dry for later use. (b) Take 100g of acid aluminum salt aluminum sulfate, 10g of bagasse and 5g of sodium dihydrogen phosphate, add 300mL of deionized water, stir evenly, ultrasonicate for 40min, and then mix 200g of potassium metaaluminate with 400mL of The salt solution made of deionized water and the above-mentioned acidic aluminum salt solution are mixed in parallel to form a gel, and the acidic precipitant hydrochloric acid is added to adjust the pH value of the system to 7, aged at 75°C for 10 hours, washed by filtration, an...

Embodiment 3

[0034] (a) Take the bagasse, wash it with water to remove the residual sugar, and dry it. Take 5g of sodium hydroxide, add 95g of deionized water, configure 5wt% sodium hydroxide solution, and mix 25g of bagasse with 60mL of the above solution. After stirring evenly, they are placed in a stainless steel reaction kettle with a polytetrafluoroethylene lining. Hydrothermal treatment at 180°C for 4 hours, after cooling down, take out, wash with water until neutral, dry for later use. (b) Take 100g of acidic aluminum salt aluminum nitrate, 7g of bagasse and 2g of sodium dihydrogen phosphate, add 400mL of deionized water, stir evenly, ultrasonicate for 50min, and then mix 100g of sodium metaaluminate with 300mL of The salt solution made of deionized water and the above-mentioned acidic aluminum salt solution are mixed together to form a gel, and the alkaline precipitant sodium bicarbonate is added to adjust the pH value of the system to 7.5, aged at 60°C for 8 hours, and washed by c...

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Abstract

An aluminum oxide carrier is characterized by having a pore volume from 0.6mL / g to 1.1mL / g, a specific surface area from 200m<2> / g to 300m<2> / g, 50%-60% of pores with pore diameters more than 60nm, 25%-35% of pores with pore diameters from 30nm to 45nm and 10%-15% of pores with pore diameters from 8nm to 12nm. The aluminum oxide carrier has a multi-level pore channel structure.

Description

technical field [0001] The invention belongs to an alumina carrier and a preparation method, in particular to an alumina carrier with a multi-level pore structure, a preparation method and an application. Background technique [0002] In the hydrogenation process of 1,4-butanediol synthesized by alkyne aldehyde method, 1,4-butynediol synthesized by formaldehyde acetylation usually needs to undergo two stages of hydrogenation to finally obtain 1,4-butanediol product. One-stage hydrogenation is carried out at lower temperature and pressure, using Raney Ni catalyst, its main purpose is to convert most of the 1,4-butynediol hydrogenation into the target product 1,4-butanediol, at the same time, the The heat of reaction was removed in time. The hydrogenated material also contains unsaturated hydrogenated by-products, such as 1,4-butenediol, 4-hydroxybutyraldehyde and other aldehydes. In the hydrogenation process of the second stage, the fixed bed is used as the hydrogenation re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J35/10B01J23/755C07C29/42C07C31/20
CPCC07C29/42B01J21/04B01J23/755B01J35/635B01J35/638B01J35/647B01J35/615C07C31/207
Inventor 赵永祥李海涛张因孙自瑾
Owner SHANXI UNIV
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