Propane oxidative dehydrogenation catalyst and its application

A technology for oxidative dehydrogenation and catalysts, applied in physical/chemical process catalysts, molecular sieve catalysts, organic chemistry, etc., can solve the problem of low activity of propane oxidative dehydrogenation catalysts

Active Publication Date: 2021-08-03
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 activity 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 oxidative dehydrogenation catalyst and its application
  • Propane oxidative dehydrogenation catalyst and its application
  • Propane oxidative dehydrogenation catalyst and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Weigh 3 gram of Si / Al=20 MFI molecular sieves, 0.47 gram of chromium nitrate nonahydrate, 0.053 gram of boric acid, 0.03 gram of potassium nitrate, join in 10 ml of deionized water, adjust the pH value of the solution to 3.5 with 2.5% ammonia water, After soaking in a water bath at 80°C for 1 hour, the sample was taken out and filtered, dried in an oven at 100°C for 8 hours, and then put into a muffle furnace and calcined at 550°C for 4 hours to obtain the desired catalyst. The mixed gas of propane, carbon dioxide and nitrogen is adjusted by the mass flow meter, enters the preheating zone for mixing, and then enters 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. A quartz tube with an inner diameter of Ф10mm-Ф7mm and a length of about 450mm. After the reaction gas passes through the condensation tank, it enters the gas chromatography to analyze its comp...

Embodiment 2

[0034] Weigh 3 grams of MFI molecular sieve with Si / Al=1000, 0.47 grams of chromium nitrate nonahydrate, 0.053 grams of boric acid, and 0.03 grams of potassium nitrate, and add them to 10 ml of deionized water, and adjust the pH value of the solution to 3.5 with 2.5% ammonia water , and then immersed in a water bath at 80°C for 1 hour, the sample was taken out and filtered, dried in an oven at 100°C for 8 hours, and then put into a muffle furnace and calcined at 550°C for 4 hours to obtain the desired catalyst. Evaluation conditions are the same as in Example 1, and the results are shown in Table 1.

Embodiment 3

[0036] Weigh 3 gram of Si / Al=60 MFI molecular sieves, 0.47 gram of chromium nitrate nonahydrate, 0.053 gram of boric acid, 0.03 gram of potassium nitrate, join in 10 milliliters of deionized water, adjust the pH value of the solution to 3.5 with 2.5% ammonia water, After soaking in a water bath at 80°C for 1 hour, the sample was taken out and filtered, dried in an oven at 100°C for 8 hours, and then put into a muffle furnace and calcined at 550°C for 4 hours to obtain the desired catalyst. Evaluation conditions are the same as in Example 1, and the results are shown in Table 1.

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Abstract

The invention relates to a propane oxidative dehydrogenation catalyst and its application, which mainly solves the problem of low conversion rate of the dehydrogenation catalyst prepared in the prior art. The present invention comprises the following components in parts by weight: a) 1 to 20 parts of Cr element or its oxide; b) 0.1 to 5 parts of B element and its oxide; c) 0 to 5 parts of alkali metal or Its oxide; d) The technical solution of 70-99 parts of MFI molecular sieve solves this problem well, has the advantages of simple process, high activity, good stability, etc., and can be used in the industrial production of propane carbon dioxide oxidative dehydrogenation to propylene.

Description

technical field [0001] The invention relates to a propane oxidation dehydrogenation catalyst and its application. Background technique [0002] Propylene is an organic raw material second only to ethylene in the petrochemical field. It is mainly used for the production of polypropylene. In order of consumption, propylene is also used for the production of important chemical products such as acrylonitrile, phenol, butanol, propylene oxide, and acrylic acid. At present, propylene is still mainly derived from ethylene co-production and refinery by-products. my country's propylene production increase technology is in line with the international level, especially the FCC propylene production increase technology, which is already in a leading position in the world. In addition, with the development of coal chemical technology, especially the industrialization of MTO technology, the output of propylene has increased rapidly. However, in recent years, the demand for propylene downs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/076C07C5/48C07C11/06
CPCB01J29/076B01J2229/18B01J2229/40C07C5/48C07C11/06Y02P20/52
Inventor 吴省缪长喜刘瑞丹
Owner CHINA PETROLEUM & CHEM CORP
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