Platinoid bi-component catalyst as well as preparation method and application thereof

A catalyst, two-component technology, used in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Reduce the propylene yield and other problems, and achieve the effects of uniform distribution, high propane conversion, and good propylene selectivity

Inactive Publication Date: 2013-10-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Pt / Al2O3 catalyst also has disadvantages: it is easy to deactivate due to carbon deposition in the reaction, thereby reducing the yield of propylene
However, the propane conversion rate of the catalyst is low and needs to be further improved

Method used

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  • Platinoid bi-component catalyst as well as preparation method and application thereof
  • Platinoid bi-component catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) The carrier γ-Al 2 o 3 The powder is placed at 2.62*10 at 60°C -3 Cu(NO 3 ) 2 Immerse in the aqueous solution for 6h, the ratio of carrier mass to solution volume is 1g:30ml;

[0028] (2) The eggplant-shaped bottle is connected to a rotary evaporator, and the rotary evaporator is connected to a vacuum pump. The solvent water is removed by a rotary evaporator under reduced pressure, dried at 120°C for 12 hours, and roasted at 550°C for 4 hours to obtain a copper-supported catalyst powder;

[0029] (3) At 60°C, place the prepared copper-supported catalyst powder at 8.54*10 -4 M of H 2 PtCl 6 Immerse in the aqueous solution for 6 hours, the ratio of the mass of the carrier to the volume of the solution is 1g:30ml;

[0030] (4) The eggplant-shaped bottle is connected to a rotary evaporator, and the rotary evaporator is connected to a vacuum pump. The solvent water is removed by a rotary evaporator under reduced pressure, dried at 120°C for 12 hours, and roasted at ...

Embodiment 2

[0040] The method in Example 1 was used for the reaction, the only difference being that the immersion temperatures of step (1) and step (3) were both 40°C.

Embodiment 3

[0042] The method of Example 1 was used for the reaction, the only difference being that the immersion temperatures of step (1) and step (3) were both 80°C.

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Abstract

The invention discloses a platinoid bi-component catalyst as well as a preparation method and application thereof. In the catalyst, gamma-Al203 is taken as a carrier, platinum is taken as an active component, and copper is taken as auxiliary agent. The preparation method includes the following steps: dipping the carrier gamma-Al203 powder in Cu(NO3)2 water solution, removing solvent, drying and roasting, placing the obtained copper-loaded catalyst in H2PtCl6 water solution for dipping, removing solvent, drying and roasting, wherein the platinoid bi-component catalyst can be used in propylene preparation through propane dehydrogenation. According to the invention, copper and platinum in the catalyst interact to change the interaction force between the reactant and the metal surface and between the product and the metal surface, so that better reaction stability at a high temperature in propylene preparation through propane dehydrogenation is guaranteed, the dimethylmethane conversion ratio is higher, the propylene selectivity is excellent; different components of the catalyst can be dipped through the step-by-step dipping method, contents of the components can be controlled easily, and the repeatability is excellent.

Description

technical field [0001] The invention relates to a catalyst and its preparation method and application, in particular to a catalyst for propane dehydrogenation to propylene, its preparation method and application. Background technique [0002] Propylene is one of the most important petrochemical products and is widely used as the main raw material for the production of chemicals such as acrylonitrile, propylene oxide and acrylic acid. In recent years, driven by the rapid development of industries such as real estate, automobiles, packaging, and textiles and clothing, there has been a huge volume and gap in the propylene market, which makes propylene the most promising large petrochemical product at present. The existing propylene mainly comes from by-products or co-productions such as traditional processes such as petroleum catalytic cracking and naphtha reforming. The traditional process is affected by factors such as oil supply and product distribution, and the supply of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07C11/06C07C5/333
CPCY02P20/52
Inventor 巩金龙韩志萍李水荣张成喜赵玉军马新宾
Owner TIANJIN UNIV
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