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Preparation method of propane dehydrogenation catalyst

A propane dehydrogenation and catalyst technology, which is applied in the direction of catalyst activation/preparation, catalyst, molecular sieve catalyst, etc., can solve the problems of complicated oxidation reaction process and difficult preparation of catalyst, so as to improve the yield of propylene, reduce the occurrence of cracking reaction, acid The effect of alkalinity reduction

Inactive Publication Date: 2018-03-20
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with anaerobic dehydrogenation, oxidative dehydrogenation can be carried out at a lower temperature, but there are problems such as complex oxidation reaction process and difficulty in preparing catalysts with better performance, so it is still in the stage of exploration and development

Method used

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  • Preparation method of propane dehydrogenation catalyst

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Experimental program
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Effect test

Embodiment 1

[0018] A preparation method of propane dehydrogenation catalyst, the method comprises the following steps:

[0019] Step 1. Combine the loaded TaON catalyst with the cocatalyst MoS 2 Mix, the mass ratio is 1:3, then add 30 parts of glycerol fusion agent and stir evenly, place in an oil bath at 300°C for 2 hours, let stand at room temperature for more than 1 hour, discard the supernatant, and wash the lower layer with ultrapure water Material, obtain composite TaON catalyst;

[0020] Step 2. Then slowly add 9 parts of potassium permanganate to 35 parts of the above-mentioned composite TaON catalyst, and the adding speed is strictly controlled to ensure that the temperature is lower than 20°C, then remove the ice bath, use a water bath and keep the temperature at about 35°C, Keep warm for 2 hours, slowly start to add 120 parts of deionized water under stirring, the system is violently heated to 98°C, and then kept in a 98°C water bath for 15 minutes;

[0021] Step 3, then furt...

Embodiment 2

[0031] Step 1. Combine the loaded TaON catalyst with the cocatalyst MoS 2 Mix, the mass ratio is 1:3, then add 30 parts of glycerol fusion agent and stir evenly, place in an oil bath at 300°C for 2 hours, let stand at room temperature for more than 1 hour, discard the supernatant, and wash the lower layer with ultrapure water Material, obtain composite TaON catalyst; All the other steps are with embodiment 1.

Embodiment 3

[0033] Step 1. Combine the loaded TaON catalyst with the cocatalyst MoS 2 Mix, the mass ratio is 1:3, then add 30 parts of glycerol fusion agent and stir evenly, place in an oil bath at 300°C for 2 hours, let stand at room temperature for more than 1 hour, discard the supernatant, and wash the lower layer with ultrapure water Material, obtain composite TaON catalyst; All the other steps are with embodiment 1.

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Abstract

The invention discloses a preparation method of a propane dehydrogenation catalyst. The method comprises the following steps: by using Ta2O5, nano silicon oxide, molybdenum sulfide, glycerol, potassium permanganate and a hydrogen peroxide solution as raw materials , performing grinding and calcination on Ta2O5 and the nano silicon oxide, then performing oxidation modification by using the potassium permanganate and the hydrogen peroxide solution, and performing high-temperature expansion treatment in a tubular furnace. According to the preparation method disclosed by the invention, dehydrogenation reaction on propanol is carried out so as to obtain propylene, and therefore, the steps such as isomerization and the like in a conventional process are eliminated, the technology processes are shortened, and the single-pass yield of the propylene is greatly improved.

Description

technical field [0001] The invention relates to a propane dehydrogenation catalyst and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] At present, 59.1% of the world's propylene production comes from steam cracking ethylene co-production, 35.1% comes from refinery refining by-products, and 2.9% comes from propane dehydrogenation. There are two methods of propane dehydrogenation: anaerobic dehydrogenation and oxidative dehydrogenation. Among them, the technology of anaerobic dehydrogenation to propylene has been industrialized, and the Oleflex process of UOP Company and the Catofin process of Lummus Company are the most widely used. Compared with anaerobic dehydrogenation, oxidative dehydrogenation can be carried out at a lower temperature, but there are problems such as complex oxidation reaction process and difficulty in preparing catalysts with better performance, so it is still in the stage of exploration and de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/12B01J29/85C07C5/333C07C11/06
CPCB01J27/24B01J29/85B01J37/08B01J37/12C07C5/3332C07C2527/24C07C2529/85C07C11/06Y02P20/52
Inventor 高光珍
Owner XUZHOU NORMAL UNIVERSITY
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