Low carbon alkane dehydrogenation catalyst and preparation method thereof

A low-carbon alkane and catalyst technology, which is applied to the catalyst and preparation field of a low-carbon alkane dehydrogenation catalyst, can solve the problems of poor catalyst stability, easy coke deactivation of the catalyst, slow deactivation rate of the catalyst coke, and the like. Stable performance

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • 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 that in the prior art, there are problems in the prior art that the catalyst is easy to be deactivated by carbon deposition during high temperature use, and the stability of the catalyst is poor. Catalyst, the catalyst is used in the process of dehydrogenating low-carbon alkanes to produce low-carbon olefins, and has the advantages of slow catalyst deactivation rate and high catalyst stability when used under high temperature conditions

Method used

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  • Low carbon alkane dehydrogenation catalyst and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0026] In 430.7g of pseudo-boehmite raw powder main material, add 12.9g of turnip powder and mix evenly, then add 150 ml of mixed solution containing catalyst active components, including 2.9g of sodium nitrate; 2.3g of zinc nitrate, knead fully and squeeze The strips were placed at room temperature for 12 hours, then kept at 90°C for 3 hours, and then dried at 120°C for 10 hours, pelletized and treated at 750°C to obtain a composite carrier containing catalytic promoters.

[0027] The composite alumina carrier obtained adopts impregnation technology to load the platinum-tin component, namely at room temperature with the alumina carrier impregnated with the required amount of chloroplatinic acid-tin tetrachloride (3.15g chloroplatinic acid; 6.4g crystallization tin tetrachloride) mixed aqueous solution for 24 hours, then 60 oC drying, in air stream 530 oC Roast for 3 hours, then steam at 530 oC Under treatment for 4 hours, ultimatum dry air 530 oC Treat for 1 hour to ob...

Embodiment 2

[0030] In 430.1g of pseudo-boehmite raw powder main material, add 12.3g of turnip powder and mix evenly, then add 150 ml of mixed solution containing catalyst active components, including 2.9g of sodium nitrate; 3.7g of zinc nitrate, knead fully and squeeze The strips were placed at room temperature for 12 hours, then kept at 90°C for 3 hours, and then dried at 120°C for 10 hours, pelletized and treated at 750°C to obtain a composite carrier containing catalytic promoters.

[0031] The composite alumina carrier obtained adopts impregnation technology to load the platinum-tin component, namely at room temperature with the alumina carrier impregnated with the required amount of chloroplatinic acid-tin tetrachloride (3.15g chloroplatinic acid; 6.4g crystallization tin tetrachloride) mixed aqueous solution for 24 hours, then 60 oC drying, in air stream 530 oC Roast for 3 hours, then steam at 530 oC Under treatment for 4 hours, ultimatum dry air 530 oC Treat for 1 hour to ob...

Embodiment 3

[0034] In 429.8g of pseudo-boehmite raw powder main material, add 12.8g of scallop powder and mix evenly, then add 150 ml of mixed solution containing catalyst active components, including 1.6g of sodium nitrate; 2.1g of zinc nitrate, knead fully and squeeze The strips were placed at room temperature for 12 hours, then kept at 90°C for 3 hours, and then dried at 120°C for 10 hours, pelletized and treated at 750°C to obtain a composite carrier containing catalytic promoters.

[0035] The composite alumina carrier obtained adopts impregnation technology to load the platinum-tin component, that is, at room temperature, impregnates the required amount of chloroplatinic acid-tin tetrachloride (3.42g chloroplatinic acid; 5.4g crystallization tin tetrachloride) mixed aqueous solution for 24 hours, then 60 oC drying, in air stream 530 oC Roast for 3 hours, then steam at 530 oC Under treatment for 4 hours, ultimatum dry air 530 oC Treat for 1 hour to obtain a catalyst sample, de...

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Abstract

The invention relates to a noble metal catalyst used for preparing low carbon olefin by dehydrogenating low carbon alkane, and a preparation method thereof. A problem of the influence of likely carbon deposit inactivation of present catalysts under high temperature conditions on the one way stability of the catalysts is mainly solved. The catalyst comprises a certain amount of a noble metal component distributed on a porous alumina carrier, a composite assistant composed of IIA group element components, IIB group element components and rare earth elements, and a certain amount of an alkali metal / alkali earth metal component. A technical scheme adopted in the invention is characterized in that a dipping process is adopted to load noble metals, that is, an aqueous solution of a soluble salt is adopted to dip platinum and other components, and the platinum-tin catalyst is obtained after drying, roasting and water vapor treatment .The preparation method well solves the problem, and can be used in the industrial production of the catalyst for preparing low carbon olefin by using low carbon alkane.

Description

technical field [0001] The invention relates to a low-carbon alkane dehydrogenation catalyst and a preparation method thereof. Background technique [0002] The dehydrogenation of light alkanes to olefins is an important chemical process. With the development of the chemical industry, low-carbon olefins have a wide range of uses and values ​​as important raw materials for the production of plastics, synthetic rubber, drugs, gasoline additives, ion exchange resins, detergents, fragrances and various chemical intermediates. Propylene / isobutene mainly comes from the co-production or by-product of steam cracking and fluid catalytic cracking process in refineries. With the increasing demand for low-carbon olefins, the traditional production process is difficult to meet the rapid growth of market demand. At present, a large amount of low-carbon alkanes obtained from refineries are the main components of liquefied petroleum gas, which are mainly used as civil fuels, have not been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J23/63B01J23/89C07C11/09C07C5/333
Inventor 樊志贵缪长喜吴文海曾铁强吴省姜冬宇
Owner CHINA PETROLEUM & CHEM CORP
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