a kind of sio 2 -c modified al 2 o 3 Carrier and preparation method and application

A carrier and modification technology, which is applied in the direction of hydrogenation preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems of difficult control of conditions and complicated preparation process, and achieve the effects of improving anti-hydration performance, promoting hydrolysis and improving quality

Active Publication Date: 2019-09-10
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process is relatively complicated, and many conditions are difficult to control during the catalyst scale-up process.

Method used

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  • a kind of sio <sub>2</sub> -c modified al <sub>2</sub> o <sub>3</sub> Carrier and preparation method and application
  • a kind of sio <sub>2</sub> -c modified al <sub>2</sub> o <sub>3</sub> Carrier and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 100g of alumina carrier, steam treatment at 120°C for 0.5h, then vacuum-dry at 30°C for 1h; weigh 1.79g of methyl orthosilicate (containing SiO2 Weight 0.7g), and the sucrose of 0.1g, be dissolved in the methanol-water system of water volume fraction 1%, be mixed with the mixed solution of 50mL, and add formic acid wherein to adjust the pH value of solution at 3; Add the mixed solution prepared Put it into 100g of alumina carrier treated with water vapor, keep it airtight for 1h, and dry at 70°C for 2h; at 450°C, H 2 5% H by volume 2 / N 2 Calcined in mixed atmosphere for 1h to get SiO 2 -C modified Al 2 o 3 Carrier, containing aluminum oxide weight 100g in this carrier, SiO 2 Mass 0.7g, C mass 0.05g, pore volume 1.1mL / g, specific surface area 270m 2 / g, the average pore diameter is 13nm.

[0026] Weigh the above SiO 2 -C / Al 2 o 3 Carrier 100g, weighing 43.08g nickel nitrate hexahydrate, prepared into 80mL impregnating solution, added to the carrier, dried ...

Embodiment 2

[0028] Take 100g of alumina carrier, steam treatment at 200°C for 2h, then vacuum-dry at 50°C for 5h; weigh 53.57g of ethyl orthosilicate (containing SiO 2 Weight 15g), and the glucose of 12g, be dissolved in the ethanol-water system of water volume fraction 10%, be mixed with the mixed solution of 120mL, and add glacial acetic acid wherein to regulate solution pH value at 5; The mixed solution of preparation is added to In the 100g alumina carrier treated with water vapor, keep it airtight for 5 hours, and dry it at a temperature of 200°C for 15 hours; at a temperature of 750°C, H 2 55% H by volume 2 / N 2 Calcined in a mixed atmosphere for 8 hours to obtain SiO 2 -C modified Al 2 o 3 Carrier, containing aluminum oxide weight 100g in this carrier, SiO 2 Mass 15g, C mass 7g, pore volume 0.5mL / g, specific surface area 180m 2 / g, average pore diameter 5nm.

[0029] Weigh the above SiO 2 -C / Al 2 o 3 Carrier 100g, weighing 67.55g nickel nitrate hexahydrate, prepared into ...

Embodiment 3

[0031] Take 100g of alumina carrier, steam treatment at 160°C for 1h, then vacuum-dry at 40°C for 3h; weigh 17.86g of ethyl orthosilicate (containing SiO 2 Weight 5g), and the polyethylene glycol of 3g, be dissolved in the propanol-water system of water volume fraction 5%, be mixed with the mixed solution of 80mL, and wherein add citric acid adjustment solution pH value at 4; The mixed solution was added to 100 g of alumina carriers treated with water vapor, sealed and left for 3 hours, and dried at a temperature of 140°C for 10 hours; at a temperature of 600°C, H 2 40% volume fraction of H 2 / N 2 Calcined in a mixed atmosphere for 5 hours to obtain SiO 2 -C modified Al 2 o 3 Carrier, containing aluminum oxide weight 100g in this carrier, SiO 2 Mass 5g, C mass 1.5g, pore volume 0.8mL / g, specific surface area 220m 2 / g, average pore diameter 9nm.

[0032] Weigh the above SiO 2 -C / Al 2 o 3 100g of the carrier, weighing 108.75g of nickel nitrate hexahydrate, was prepare...

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Abstract

ASiO2-C modified Al2O3 carrier is prepared from SiO2, C and Al2O3, and has the pore volume of 0.5 mL / g-1.1 mL / g, the specific surface area of 180 m<2> / g-270 m<2> / g and the average pore size of 5 nm-13 nm, wherein the weight of SiO2 and the weight of C are 0.7wt%-15wt% and 0.05wt%-7wt% of that of Al2O3 respectively. The SiO2-C modified Al2O3 carrier has the advantages of being good in heat stability, high in mechanical strength, proper in surface acid-base property and simple to prepare.

Description

technical field [0001] The invention belongs to a carrier and a preparation method, in particular to a SiO 2 -C modified Al 2 o 3 Carrier and preparation method and application. Background technique [0002] Alkyne aldehyde synthesis of 1,4-butanediol hydrogenation catalyst generally chooses supported nickel catalyst with alumina as the carrier. Research in recent years has found that since the raw material of 1,4-butynediol used in the synthesis of 1,4-butanediol by the alkyne aldehyde method uses water as a solvent, the hydrogenation reaction process is a reaction under hydrothermal conditions, and the long-term During the reaction process, the alumina carrier is prone to hydration and destructure problems, which eventually leads to irreversible deactivation of the catalyst. CN101322949 has reported by Al 2 o 3 Surface impregnation method introduces soluble precursor of silicon, and prepares SiO after drying and calcination 2 Modified Al 2 o 3 The method of carrie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/18B01J23/755B01J35/10C07C29/17C07C31/20C07C29/141
CPCC07C29/141C07C29/172C07C45/59B01J21/18B01J23/002B01J23/755B01J2523/00B01J35/615B01J35/638B01J35/635B01J35/647B01J2523/847B01J2523/41B01J2523/31C07C31/207C07C47/19
Inventor 李海涛赵永祥秦晓琴高春光
Owner SHANXI UNIV
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