Catalyst for preparing propylene by propane dehydrogenation as well as preparation and application thereof

A propane dehydrogenation and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrocarbons, etc., can solve the problems of unestablished propane dehydrogenation and achieve long single-pass life , high conversion rate of propane, good selectivity of propylene

Inactive Publication Date: 2009-04-22
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Propane dehydrogenation to propylene technology mainly includes (1) catalytic dehydrogenation (2) oxidative dehydrogenation (3) membrane reactor dehydrogenation. Although domestic research on the dehydrogenation of low-carbon alkanes such as internal butane has been carried out, there is no Establishment of a production plant for propane dehydrogenation

Method used

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  • Catalyst for preparing propylene by propane dehydrogenation as well as preparation and application thereof
  • Catalyst for preparing propylene by propane dehydrogenation as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 3g 40-80 mesh γ-Al 2 o 3 , baked at 550°C for 4 hours, and prepared with 0.0965M SnCl 2 Immersed in ethanol solution for 12h, removed the solvent with a rotary evaporator at 60°C under reduced pressure, dried at 120°C for 12h, and roasted at 550°C for 4 hours, and then added 0.0945M Zn(NO 3 ) 2 Immerse in the solution for 12 hours, remove the solvent with a rotary evaporator under reduced pressure at 60°C, dry at 120°C for 8-12 hours, and roast at 550°C for 4 hours, then use 0.096M Ce(NO 3 ) 3 Immerse in the solution for 12 hours, remove the solvent with a rotary evaporator at 60°C under reduced pressure, dry at 120°C for 8-12 hours, bake at 550°C for 4 hours, and finally use 0.01913M H 2 PtCl 6 The solution was soaked for 12 hours, the solvent was removed by a rotary evaporator under reduced pressure at 60°C, dried at 120°C for 8-12 hours, and calcined at 550°C for 4 hours. Prepare catalyst (1), catalyst component is: Pt-Sn-Ce-Zn / γ-Al 2 o 3 .The percentag...

Embodiment 2

[0025] Catalyst (1) As a catalyst, the reaction temperature is 550-620°C, the pressure is normal pressure, and the feed gas propane space velocity is 3000-4000h -1 , also have hydrogen and nitrogen in the feed gas, hydrogen: hydrocarbon: nitrogen molar ratio is 1:1:7, and reaction product gas is through gas chromatography on-line analysis, and propane conversion ratio is as follows: figure 1 , propylene selectivity such as figure 2 .

Embodiment 3

[0027] Change the percentage of Zn from 4% to 8% in Example 1, and the others are the same as in Example 1 to prepare the catalyst (2). Propane conversion rate as figure 1 , propylene selectivity such as figure 2 .

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Abstract

The invention relates to the field of organic chemistry, in particular to a catalyst for dehydrogenating propane to prepare propylene. The catalyst for dehydrogenating propane to prepare propylene uses gamma-Al2O3 as a carrier, platinum metal and tin metal as main catalysts and a zinc metal element and a rare earth metal element as additives. The mass percentage of platinum is between 0.01 and 2 percent; the mass percentage of Sn is between 0.1 and 5 percent; the mass percentage of zinc in the catalyst is between 0.1 to 5 percent; and the mass percentage of rare earth metal elements is between 0.1 and 5 percent. The invention discloses a method for preparing the catalyst and an application method. The catalyst has the advantages that the catalyst with four compositions is prepared by adopting a continuous isometric dipping method; and the content of any composition is easy to control. The prepared catalyst has high specific surface area and high catalytic activity; propane has high transformation rate; and propylene has good selectivity. The catalyst has long one-way service life and good industrial application prospect.

Description

technical field [0001] The invention relates to the field of organic chemistry, in particular to a catalyst for producing propylene from propane dehydrogenation and a preparation method thereof. technical background [0002] Propylene is a colorless flammable hydrocarbon obtained from petroleum. It is an important organic chemical raw material and is widely used in the preparation of resins, fibers, elastomers and other chemical products. At present, the supply of propylene mainly comes from the by-products of naphtha cracking to ethylene and petroleum catalytic cracking process. With the rapid growth of the demand for propylene, it is difficult for the traditional propylene production to meet the demand of the petrochemical industry for propylene. my country is rich in oil and natural gas resources, which contain 60% propane and 20% butane. Therefore, the development and expansion of propylene sources in recent years is of great significance for rational use of resources an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63C07C11/06C07C5/333
CPCY02P20/52
Inventor 吴世华王彦美高志刚王要杰王淑荣
Owner NANKAI UNIV
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