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Olefin disproportionation catalyst and preparation method thereof

A technology of olefin disproportionation and catalyst, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of fast deactivation and low catalyst activity, and achieve carbon The effect of reducing accumulation, solving low catalyst activity, and good macropore penetration

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

[0008] The purpose of the present invention is to provide a novel catalyst for disproportionation of olefins, which uses alumina as a carrier with a composite pore structure of mesopores and macropores and whose apertures can be independently adjusted to solve the problem of low-carbon olefins in the prior art. There are problems of low catalyst activity and rapid deactivation in disproportionation

Method used

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  • Olefin disproportionation catalyst and preparation method thereof
  • Olefin disproportionation catalyst and preparation method thereof
  • Olefin disproportionation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Synthesis of Polystyrene (PS) Microsphere Particle Templates

[0048] 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%.

Embodiment 2

[0050] One of preparation of mesoporous / macroporous alumina support

[0051] 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 degelation, 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 pore volume measured by water titration is 1.22cm 3 / g, the spheric...

Embodiment 3

[0053] Preparation of Mesoporous / Macroporous Alumina Support Part 2

[0054] 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 degelation, 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 , 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 structure alumina carrier LMA-2. The BET specific surface area measured by nitrogen adsorption method is 259m 2 / g, the mesopore diameter is 11.7nm, and the pore volume measured by water titration is 1.61cm 3 / g, i...

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Abstract

The invention discloses an olefin disproportionation catalyst having a mesoporous and macroporous composite pore structure. The catalyst comprises at least one catalytic activity metal from oxides of rhenium, molybdenum and tungsten, and a catalyst carrier, wherein the catalyst carrier is alumina having the mesoporous / macroporous composite pore structure, pore diameters of mesopores are 2-25nm, pore diameters of macropores are 50-5000nm, the specific surface area is greater than 200m<2> / g, the pore volume is 0.6-1.8cm<3> / g, mesopores account for 40-90% of the total pore volume, macropores account for 10-60% of the total pore volume, and the macropores are communicated through pores or the mesopores. The catalyst carrier is prepared by mixing and roasting an aluminum-containing compound, a mesoporous template and a macroporous particle template. The catalyst solves problems of low activity and fast inactivation of low carbon olefin disproportionation catalysts prepared through previous technologies. A preparation method of the olefin disproportionation catalyst is also disclosed.

Description

technical field [0001] The invention belongs to the field of catalyst synthesis, and relates to a catalyst for disproportionation of olefins and a preparation method thereof, in particular to a catalyst for disproportionation of olefins with alumina as a carrier and a preparation method thereof. Background technique [0002] The disproportionation reaction of olefins is a catalytic reaction in which one or two olefins are converted into new olefin products through the cleavage and regeneration of olefin carbon-carbon double bonds. The disproportionation reaction from an olefin is called olefin self-disproportionation, and it can produce a higher molecular weight olefin and a lower molecular weight olefin. For example, propylene can disproportionate itself to ethylene and 2-butene. Another disproportionation reaction is the cross-disproportionation of two different olefins to generate other new olefins. For example, the disproportionation of 1-butene and 2-butene to propyl...

Claims

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Application Information

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IPC IPC(8): B01J23/36B01J23/28B01J23/30B01J35/10
Inventor 王治卿蔡智陈胜利袁桂梅桑磊马瑞英徐盛虎徐燕平郑京禾余伟胜
Owner CHINA PETROLEUM & CHEM CORP
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