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Propane oxidation dehydrogenation catalyst and preparation method and application thereof

A technology for oxidative dehydrogenation and catalysts, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve the problem of low selectivity and the conversion of propane oxidative dehydrogenation catalysts Low rate and other issues

Active Publication Date: 2014-09-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the low conversion rate and low selectivity of propane oxidative dehydrogenation catalysts in the prior art, and a new propane oxidative dehydrogenation catalyst is provided

Method used

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  • Propane oxidation dehydrogenation catalyst and preparation method and application thereof
  • Propane oxidation dehydrogenation catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 2 grams of SiO with a silicon-to-aluminum ratio of 20 2 Carrier, add 10 milliliters of deionized water, respectively pipette 8.8 milliliters of Cr(NO 3 ) 3 solution, 2.8 ml of KNO with a mass concentration of 0.0153 g / ml 3 solution and 3 ml of Cu(NO 3 ) 2 , adjust the pH value of the solution to 3.5 with 2.5% ammonia water, and then soak it in a water bath at 80°C for 1 hour, take out the sample for filtration, dry it in an oven at 120°C for 8 hours, and then put the sample in a muffle furnace at 550°C Calcined under the same conditions for 4 hours to obtain the desired catalyst. Adjust the flow rate of propane gas through the mass flow meter, enter the preheating zone for mixing, and then enter the reaction zone. Both the preheating zone and the reaction zone of the reactor are heated by electric heating wires to make them reach the predetermined temperature. The inner diameter of the reactor is Ф9mm— Ф6mm stainless steel casing, about 400mm long. After the...

Embodiment 2

[0039] Weigh 2 grams of SiO with a silicon-aluminum ratio of 1002 Carrier, add 10 milliliters of deionized water, respectively pipette 8.8 milliliters of Cr(NO 3 ) 3 solution, 2.8 ml of KNO with a mass concentration of 0.0153 g / ml 3 solution and 3 ml of Cu(NO 3 ) 2 , use 2.5% ammonia water to adjust the pH value of the solution to 1, then soak in a water bath at 80°C for 1 hour, take out the sample for filtration, dry it in an oven at 120°C for 8 hours, and then put the sample in a muffle furnace at 550°C Calcined under the same conditions for 4 hours to obtain the desired catalyst. The evaluation conditions are the same as in [Example 1], and the results are as follows: the conversion rate of propane in this process is 25.5%, and the selectivity of propylene is 76.3%.

[0040]

Embodiment 3

[0042] Weigh 2 grams of SiO with a silicon-aluminum ratio of 300 2 Carrier, add 10 milliliters of deionized water, respectively pipette 8.8 milliliters of Cr(NO 3 ) 3 solution, 2.8 ml of KNO with a mass concentration of 0.0153 g / ml 3 solution and 2 ml of Fe(NO with a mass concentration of 0.018 g / ml 3 ) 2 , adjust the pH value of the solution to 3.5 with 2.5% ammonia water, and then soak it in a water bath at 80°C for 1 hour, take out the sample for filtration, dry it in an oven at 120°C for 8 hours, and then put the sample in a muffle furnace at 550°C Calcined under the same conditions for 4 hours to obtain the desired catalyst. The evaluation conditions are the same as in [Example 1], and the results are as follows: the conversion rate of propane in this process is 29.8%, and the selectivity of propylene is 75.3%.

[0043]

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Abstract

The invention relates to a propane oxidation dehydrogenation catalyst and preparation method and application thereof, and mainly solves the problems of low conversion rate and poor stability of dehydrogenation catalysts in the prior art. The propane oxidation dehydrogenation catalyst comprises the following components: a) 1-30% of Cr element or its oxide; b) 0.2-10% of K, Na, Ca element or its oxide; c) 0.2-10% of Cu, Fe element or its oxide; and d) 40-98.5% of SiO2 with the silicon aluminum ratio of 20-300, and by use of the technical scheme of the propane oxidation dehydrogenation catalyst, the problems of low conversion rate and poor stability of the dehydrogenation catalysts in the prior art can be well solved, and the a propane oxidation dehydrogenation catalyst can be used for industrial production of propane oxidation dehydrogenation.

Description

technical field [0001] The invention relates to a propane oxidative dehydrogenation catalyst, a preparation method and an application thereof. Background technique [0002] Propylene is an important organic chemical raw material. With the rapid development of downstream products in recent years, the demand for propylene has increased rapidly. In 2010, my country's propylene production capacity was about 10.8 million tons per year, but at the same time the demand reached 19.05 million tons per year, and the gap between supply and demand was about More than 8 million tons. Of the propylene production, 59% comes from the by-products of ethylene produced by steam cracking units, 33% comes from the by-products of gasoline and diesel produced by catalytic cracking units of refineries, 3% comes from the propane dehydrogenation process, and 5% is obtained by other methods. Due to the shortage of petroleum resources, the current oil steam cracking and catalytic cracking technology ca...

Claims

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Application Information

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IPC IPC(8): B01J23/86C07C11/06C07C5/48
CPCY02P20/52
Inventor 吴省缪长喜吴文海樊志贵
Owner CHINA PETROLEUM & CHEM CORP
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