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Alumina carrier with composite pore structure and preparation method thereof

An alumina carrier and composite pore technology, applied in the field of materials, can solve the problems of uneven particle size of carbon black powder, difficult to control pore diameter, difficult to control the diameter of alumina carrier pores, etc. The effect of good penetration of large holes

Active Publication Date: 2012-08-01
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that the particle size of the carbon black powder is not uniform, and the diameter of the prepared alumina support pores is difficult to control
But the pore size is not easy to control

Method used

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  • Alumina carrier with composite pore structure and preparation method thereof
  • Alumina carrier with composite pore structure and preparation method thereof
  • Alumina carrier with composite pore structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Synthesis of Polystyrene Microsphere Particle Template

[0037] Take 875ml of water, 0.884g of emulsifier sodium styrene sulfonate and 0.567g of stabilizer sodium bicarbonate into the reactor, stir and raise the temperature to 75°C, then add 125ml of styrene, continue stirring for 1h, add 0.567g of initiator over two Potassium sulfate, stirring at 75°C for 18 hours to obtain a monodisperse polystyrene emulsion. The particle size of the polystyrene microspheres measured by a Zetasizer Nano-ZS dynamic light scattering particle size analyzer of Malvern Instrument Co., Ltd. is 139 nm, and the relative standard deviation of the particle size is 3.2%. PS microspheres with other particle sizes can be obtained by adjusting the material ratio or reaction conditions.

Embodiment 2

[0039] One of preparation of mesoporous / macroporous alumina support

[0040] Disperse 40.8 g of SB powder in 1L of deionized water, stir and drop 1 mol / L nitric acid solution (until the pH of the suspension = 3.0-4.0) at 80°C for degumming, and obtain about 1 mol / L alumina Sol. Dissolve 34.8g of P123 in alumina sol, continue stirring for 1 hour, add PS microsphere suspension (the mass ratio of PS microspheres to alumina is 10%), mix well, and age the obtained material solution at room temperature , washed, filtered, dried, and then raised to 300°C at a rate of 1°C / min in a muffle furnace, then roasted at a constant temperature for 3 h, and then raised to 550°C at a rate of 1°C / min, and roasted at a constant temperature for 5 h , to obtain mesoporous / macroporous alumina support LMA-1. The BET specific surface area measured by nitrogen adsorption method is 230m 2 / g, the mesopore diameter is 13.4nm, and the mesopore volume is 0.89 cm 3 / g, the total pore volume measured by...

Embodiment 3

[0042] Preparation of Mesoporous / Macroporous Alumina Support Part 2

[0043] Disperse 40.8 g of SB powder in 1L of deionized water, stir and drop 1 mol / L nitric acid solution (until the pH of the suspension = 3.0-4.0) at 80°C for degumming, and obtain about 1 mol / L alumina Sol. Dissolve 34.8g of P123 in alumina sol, continue stirring for 1 hour, add PS microsphere suspension (the mass ratio of PS microspheres to alumina is 20%), mix well, and age the obtained material solution at room temperature , dried, and then raised to 300°C at a rate of 1°C / min in a muffle furnace, then calcined at a constant temperature for 3 h, and then raised to 550°C at a rate of 1°C / min, and calcined at a constant temperature for 5 h to obtain mesoporous / Macroporous alumina support LMA-2. The BET specific surface area measured by nitrogen adsorption method is 259m 2 / g, the mesopore diameter is 11.7nm, and the mesopore volume is 0.90 cm 3 / g, the pore volume measured by water titration is 1.6...

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Abstract

The invention discloses a preparation method of an alumina carrier with a composite pore structure, which comprises the steps of mixing and roasting an aluminum-contained compound and a composite template, wherein the composite template comprises a mesoporous template selected from at least one of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock polymer, polyethylene glycol, dodecylamine, hexadecyl trimethyl ammonium bromide, lauric acid, stearic acid and fatty alcohol polyoxyethylene ether and a macroporous particulate template selected from polystyrene microspheres with the particle size of greater than 50nm, polymethyl methacrylate microspheres, biomaterial particles, asphalt particles or heavy oil residues; and the weight ratio of the mesoporous template to the macroporous particulate template to the aluminum-contained compound (by alumina) is 0.1-2:0.1-0.7:1. The invention also discloses the alumina carrier simultaneously having mesoporous tunnels and macroporous tunnels prepared through the method, wherein mesopores account for 40-90% of the total pore volume, and macropores account for 10-60% of the total pore volume.

Description

technical field [0001] The invention belongs to the field of materials, and relates to an alumina carrier and a preparation method thereof, in particular to an alumina carrier with a composite pore structure and a preparation method thereof. Background technique [0002] As a cheap catalyst or catalyst carrier, alumina is widely used in petrochemical, organic synthesis, fine chemical and other fields. [0003] According to the definition of the International Union of Pure and Applied Chemistry (IUPAC), according to the pore size, porous materials can be divided into the following three types: Microporous, Mesoporous and Macroporous materials; the pore size is less than 2 nanometers Those with a diameter larger than 50 nanometers are called macropores; those with a diameter between 2 and 50 nanometers are called mesopores. [0004] The synthesis of mesoporous or macroporous alumina molecular sieves with larger specific surface area and narrower pore size distribution has aro...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J35/04B01J23/36B01J23/30C07C11/06C07C4/06
CPCY02P20/52
Inventor 王治卿蔡智陈胜利袁桂梅桑磊马瑞英徐盛虎徐燕平余伟胜郑京禾
Owner CHINA PETROLEUM & CHEM CORP
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