Catalyst for propane dehydrogenation to propylene, preparation method and application thereof

A propane dehydrogenation and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of low conversion rate of propylene selectivity

Active Publication Date: 2019-09-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a catalyst for producing propylene from propane dehydrogenation and a preparation method thereof and a method for producing propylene from propane dehydrogenation in order to overcome the technical problems of low conversion rate and propylene selectivity of propane dehydrogenation reaction in the prior art

Method used

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  • Catalyst for propane dehydrogenation to propylene, preparation method and application thereof
  • Catalyst for propane dehydrogenation to propylene, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This example is used to illustrate the preparation of the catalyst for propane dehydrogenation to propylene provided by the present invention.

[0038] Preparation: impregnate 60g of γ-alumina (Shandong Aluminum) at 75°C in 0.03mol / L chloroplatinic acid (Sinopharm Chemical Reagent Co., Ltd.), 0.2mol / L stannous chloride (Tianjin Guangfu Fine Chemical Research ) and 2mol / L boric acid (Sinopharm Group Chemical Reagent Co., Ltd.) aqueous solution for 0.5h, wherein the volume of the solution was measured according to the mass content of the catalyst component, and dried by rotary evaporation at 75°C for 0.5h, then the The material was placed in a muffle furnace and calcined in an air atmosphere at 450° C. for 3 hours to obtain catalyst precursor I. Take out catalyst precursor I, place it in tube furnace, under H 2 and C 2 h 4 The catalyst precursor II was obtained by calcining in a mixed atmosphere with a volume ratio of 1:1 for 15 min at a calcining temperature of 500°C....

Embodiment 2

[0042] Preparation: The preparation method is the same as in Example 1, but the active components of the catalyst and the mass content of the auxiliary agent are different, and the catalyst 2 is prepared, and its composition is Al 2 o 3 / Pt / Sn-C-B.

[0043] Based on the total mass of catalyst 2, the mass content of each component in catalyst 2 is shown in Table 1.

[0044] Detection: Fill the catalyst 2 in the fixed bed reactor, the filling volume is 30mL, and the volume space velocity of the propane feed is controlled to be 500h -1 , the reaction pressure is normal pressure, the temperature at the inlet of the reactor is 565° C., and the reaction is carried out for 3 hours. The propane dehydrogenation products are analyzed by HP7890 gas chromatography. The test results are shown in Table 2.

Embodiment 3

[0046] Preparation: The preparation method is the same as in Example 1, but the active components of the catalyst and the mass content of the auxiliary agent are different, and the catalyst 3 is prepared, and its composition is Al 2 o 3 / Pt / Sn-C-B.

[0047] Based on the total mass of catalyst 3, the mass content of each component in catalyst 3 is shown in Table 1.

[0048] Detection: Fill the catalyst 3 in the fixed bed reactor, the filling volume is 30mL, and the volume space velocity of the propane feed is controlled to be 1600h -1 , the reaction pressure is normal pressure, the inlet temperature of the reactor is 600° C., and the reaction is carried out for 3 hours. The propane dehydrogenation products are analyzed by HP7890 gas chromatography. The test results are shown in Table 2.

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Abstract

The invention relates to a catalyst for preparing propene through dehydrogenating propane, a preparation method for the catalyst and an application of the catalyst. The catalyst contains a carrier, an active ingredient and auxiliaries, wherein the active ingredient and the auxiliaries are loaded to the carrier, the carrier is aluminum oxide, the active ingredient is platinum metal, and the auxiliaries comprise IIIA-family elements, tin and carbon. When a reaction for preparing the propene through dehydrogenating the propane is carried out by using the catalyst, relatively high propane conversion ratio and propene selectivity can be obtained.

Description

technical field [0001] The invention relates to a catalyst for producing propylene from propane dehydrogenation, a preparation method thereof, and an application of the catalyst in propane dehydrogenation. Background technique [0002] Propylene is an important organic chemical raw material, widely used in chemical products such as polypropylene, polyacrylonitrile, propylene oxide, and acrylic acid. Propylene is mainly derived from the catalytic cracking process of naphtha steam cracking to ethylene and petroleum refining. However, in recent years, with the large-scale application of shale gas in the United States, the raw material of ethylene cracking plants has shifted from high-priced naphtha to cheap ethane, resulting in a significant reduction in the amount of by-product propylene. A large amount of propane is produced, so it is of great research significance to obtain propylene with high added value through the method of catalytic dehydrogenation of propane with high ...

Claims

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Application Information

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IPC IPC(8): B01J23/62C07C11/06C07C5/333
Inventor 王国清金立杜志国张永刚
Owner CHINA PETROLEUM & CHEM CORP
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