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Method for preparing supported selective hydrogenation catalyst by using microemulsion technology

A technology for selective hydrogenation and catalysts, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of unsuitable for practical application and less metal loading of catalyst particles , to achieve the effects of easy operation, improved low-temperature hydrogenation activity of nickel, and simple preparation method

Inactive Publication Date: 2010-06-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention adopts the W / O type microemulsion system to prepare a nano-hydrogenation catalyst, and the metal loading can reach more than 20%, which solves the disadvantage that the catalyst particles have less metal loading and are not suitable for practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add 50ml of TritonX-100, 50ml of n-hexanol, and 50ml of n-octane into a 500ml three-necked flask at a constant temperature of 25°C, and stir for 1 hour. Then slowly drop 30ml of metal salt solution (dissolved with 1.3 grams of nickel nitrate hexahydrate and 0.7 grams of copper nitrate trihydrate), stir for 1 hour and add 3 grams of α-Al 2 o 3 (specific surface area 34.22m 2 g -1 ) carrier, and stirred for another 2 hours. Slowly add a precipitating agent (1.410 mol / L NaOH solution) until the pH value is 10, and stir for 2 hours.

[0040] (2) Add 80ml of acetone to break the emulsion, stir for one hour and then suction filter. Wash the filtered product with ethanol, then dry it in a drying oven at 100°C for 1 hour, cool it to room temperature, and put it into a muffle furnace for roasting. Heat to 120°C to remove most of the water and volatile organic matter, then continue heating to 200°C for 1 hour to further remove residual organic matter; finally bake to 450...

Embodiment 2

[0043] (1) Add 60ml of TritonX-100, 26ml of n-hexanol and 60ml of n-octane into a 500ml three-necked flask at a constant temperature of 20°C in a water bath, and stir for 1 hour. Then slowly drop 30ml of metal salt solution (dissolved with 1.7 grams of nickel nitrate hexahydrate and 0.36 grams of copper nitrate trihydrate), stir for 1 hour and add 3 grams of α-Al 2 o 3 (specific surface area 34.22m 2 g -1 ) carrier, and stirred for another 2 hours. A precipitant (1.4 mol / L NaOH solution) was slowly added until the pH of the mixture was 10, and stirred for 3 hours.

[0044] (2) Add 100ml of acetone to break the emulsion, stir for one hour, and then suction filter. The filtered product was washed with ethanol, then dried in a drying oven at 100°C for 1 hour, cooled to room temperature and then roasted in a muffle furnace at a temperature of 500°C, kept for 4 hours and then cooled naturally. The calcined solid is pressed into tablets, and then placed in a reactor for reducti...

Embodiment 3

[0047] (1) Add 40ml of TritonX-100, 40ml of n-hexanol and 30ml of n-octane into a 500ml three-necked flask at a constant temperature of 25°C in a water bath, and stir for 1 hour. Then slowly drop 20ml of metal salt solution (dissolved with 1.3 grams of nickel nitrate hexahydrate), stir for 1 hour and add 3 grams of α-Al 2 o 3 (specific surface area 34.22m 2 g -1 ) carrier, and stirred for another 2 hours. Slowly add a precipitating agent (1.410 mol / L NaOH solution) until the pH of the mixture is 10, and stir for 2 hours. Add 50ml of acetone to break the emulsion, stir for one hour, and filter with suction. The filtered product was washed with ethanol, then dried in a drying oven at 100°C for 1 hour, cooled to room temperature and then roasted in a muffle furnace at a temperature of 450°C for 4 hours and then cooled naturally.

[0048] (2) Add 30ml of TritonX-100, 30ml of n-hexanol and 30ml of n-octane into a 500ml three-neck flask at a constant temperature of 25°C in a wa...

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Abstract

The invention relates to a preparation method for preparing a supported selective hydrogenation catalyst by using microemulsion technology. A microemulsion system containing a surfactant, a cosurfactant, oil phase and a soluble metal salt solution is prepared in constant-temperature water bath to solve problems how to enhance hydrogenation activity and selectivity of the catalyst. Each component of the microemulsion system is prepared at a certain ratio and the system is a microemulsion system with high stable interfacial film strength, without obvious osmosis phenomenon. A nickel nano-catalyst prepared by the microemulsification technology is mainly used for selective catalytic hydrogenation reactions. The invention has the advantages that the prepared catalyst has an active component particle of which the diameter is less than 10nm; the catalyst has good dispersibility and high hydrogenation activity; the reaction temperature is low; and the preparation method is simple and easy to operate.

Description

technical field [0001] The invention belongs to a preparation method of a loaded selective hydrogenation catalyst, in particular to a method for preparing a loaded selective hydrogenation nano catalyst with nickel as the main active component by using microemulsion technology. Background technique [0002] In recent years, due to the unique volume effect, surface effect, quantum size effect and macroscopic quantum tunneling effect of nanoparticles, they have shown excellent performance in many chemical reactions, making them play an increasingly important role in the preparation of catalysts. role. A variety of nanocatalyst preparation methods have been invented, such as uniform precipitation method, sol-gel method, micro-arc oxidation method, low-temperature wet chemical method, microemulsion method and so on. Among them, the microemulsion technology has the advantages of being able to prepare metal particles with or without support, adjusting the particle size of active c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J37/18B01J23/70
Inventor 戴伟李朝晖彭晖傅吉全徐立英刘海江王育卫国宾
Owner CHINA PETROLEUM & CHEM CORP
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