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Preparation method and application of load type nano-gold catalyst

A catalyst and nano-gold technology, which is applied in the field of preparation of supported nano-gold catalysts, can solve the problem of no aluminosilicate nano-gold catalyst, etc., and achieve the effects of small catalyst dosage, high loading efficiency and high catalytic activity

Inactive Publication Date: 2010-09-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, there is no report at home and abroad that aluminosilicates can support nano-gold catalysts.

Method used

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  • Preparation method and application of load type nano-gold catalyst

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preparation example Construction

[0016] The preparation method of supported nanometer gold catalyst comprises the steps:

[0017] 1) Add 2.0 g of halloysite nanotube carrier, 2.05 to 6.15 mL of chloroauric acid solution with a concentration of 10 g / L, and 40 to 120 mL of deionized water into a 250 mL three-necked flask;

[0018] 2) Place the flask in an oil bath at 60°C, adjust the pH of the solution to 8-12 with 4.0M ammonia water, then stir and reflux at 95-105°C for 1 hour, filter, rinse with 10-20mL of 4.0M ammonia water for 5 minutes, and rinse for 15-105°C Wash with 20 mL of hot water twice, dry at 100°C for 1 to 2 hours, and finally calcine in air at 300°C for 3 to 4 hours to obtain a supported nano-gold catalyst.

[0019] Supported nano-gold catalyst for selective oxidation of cyclohexene to cyclohexenol and cyclohexenone.

Embodiment 1

[0021] Preparation of Catalyst A. Add 2.0 g of halloysite nanotube carrier, 4.10 mL of chloroauric acid solution with a concentration of 10 g / L, and 80 mL of deionized water into a 250 mL three-neck flask. The flask was placed in an oil bath at 60°C, the pH of the solution was adjusted to 8 with 4.0M ammonia water, and then stirred and refluxed at 100°C for 1 h. Finished, filtered, rinsed with 15mL of 4.0M ammonia water for 5min, pumped twice with 20mL of hot water, dried at 100°C for 1h, and finally calcined in air at 300°C for 3h to obtain catalyst A.

Embodiment 2

[0023] Preparation of Catalyst B. Add 2.0 g of halloysite nanotube carrier, 4.10 mL of chloroauric acid solution with a concentration of 10 g / L, and 80 mL of deionized water into a 250 mL three-neck flask. The flask was placed in an oil bath at 60°C, the pH of the solution was adjusted to 9 with 4.0M ammonia water, and then stirred and refluxed at 100°C for 1 h. Finished, filtered, rinsed with 15mL of 4.0M ammonia water for 5min, pumped twice with 20mL of hot water, dried at 100°C for 2h, and finally calcined in air at 300°C for 3h to obtain catalyst B.

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Abstract

The invention discloses a preparation method and an application of a load type nano-gold catalyst. The preparation method comprises the following steps of: (1) adding 2.0g of halloysite nanotube carrier, 2.05 to 6.15mL of chlorogold acid solution with a concentration of 10g / L and 40 to 120mL of deionized water to a 250mL flask with three necks; (2) putting the flask into an oil bath with the temperature of 60 DEG C; adjusting the pH of the solution to 8 to 12 by using 4.0M ammonia water; then carrying out stirring reflux at 95 DEG C-105 DEG C for 1 hour; filtering; rinsing for 5 minutes by using 10 to 20mL of 4.0M ammonia water; washing twice with 15 to 20mL of hot water; drying for 1 to 2 hours at 100 DEG C; and finally roasting for 3 to 4 hours in air at 300 DEG C to obtain the load type nano-gold catalyst. The invention has the advantages of simple and convenient preparation method, uniformly dispersed gold particles and high loading efficiency. The catalyst provided by the invention can be used for cyclohexene oxidation of cyclonene and cyclohexenol, with the advantages of mild reaction condition, good activity and selectivity and less catalyst utilization quantity.

Description

technical field [0001] The invention relates to a preparation method and application of a loaded nano-gold catalyst. Background technique [0002] In April 2001, the first International Conference on Gold Catalysts was held in South Africa, funded and organized by various business circles. In October of the same year, gold catalysts were listed as one of the central topics for the first time at the Fifth European International Conference on Catalysis held in Ireland. Since then, the research and development of gold catalysts has received great attention from academia and industry. In recent years, gold nanoparticles have been used as catalysts in various selective oxidation processes. Because nano-gold catalysts have excellent low-temperature catalytic oxidation activity, they have broad application prospects in industrial production. Japan has applied nano-gold technology to indoor deodorization and other fields. Oxides such as aluminum oxide and silicon dioxide are good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52C07C49/603C07C35/08C07C29/48C07C45/28
Inventor 朱明乔蔡贞玉沈杨一赵静杨洋洋唐月何潮洪陈新志
Owner ZHEJIANG UNIV
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