Method for preparing propylene catalyst by propane dehydrogenation process

A technology for propane dehydrogenation and catalysts, which is applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. To achieve the effect of enhancing the anti-coking ability, enhancing the effect and improving the stability

Active Publication Date: 2010-11-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the catalyst prepared by the prior art is easy to be reduced and precipitated in the process of high

Method used

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  • Method for preparing propylene catalyst by propane dehydrogenation process
  • Method for preparing propylene catalyst by propane dehydrogenation process
  • Method for preparing propylene catalyst by propane dehydrogenation process

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Dissolve 12.4 g of Dispal 11N7-80 (Boehmite) from Sol Company in 100 ml of deionized water, and stir at room temperature for 30 minutes to form an aluminum sol. Adding different amounts of SnCl 4 5H 2 O modified aluminum sol, continued to stir at room temperature for 30 minutes, placed the obtained sol in an oven at 70°C to dry overnight, then pulverized the obtained sample, sieved, and calcined at 700°C for 3 hours to obtain a modified alumina carrier.

[0018] The obtained tin-containing alumina carrier is loaded with a platinum component by impregnation technology, that is, the alumina carrier modified with different tin components is impregnated with an aqueous solution of a required amount of chloroplatinic acid for 24 hours at room temperature, and then 60 ℃ drying, calcination at 530 ℃ for 3 hours in air flow, followed by water vapor treatment at 530 ℃ for 4 hours, and finally drying air at 530 ℃ for 1 hour.

[0019] The sample was reductively activated with hy...

Embodiment 2

[0025] Dissolve 12.4 g of Dispal 11N7-80 (Boehmite) from Sol Company in 100 ml of deionized water, and stir at room temperature for 30 minutes to form an aluminum sol. Adding different amounts of SnCl 4 5H 2 O modified aluminum sol, continued to stir at room temperature for 30 minutes, placed the obtained sol in an oven at 70°C to dry overnight, then pulverized the obtained sample, sieved, and calcined at 650°C for 3 hours to obtain a modified alumina carrier.

[0026] The obtained tin-containing alumina carrier is first loaded with tin components by impregnation method, that is, the alumina carrier modified by different amounts of tin components is impregnated with SnCl 4 The aqueous solution was dried for 24 hours, then dried at 60°C, calcined at 530°C in air for 3 hours, then treated with water vapor at 530°C for 4 hours, and finally treated with dry air at 530°C for 1 hour. Then, the impregnation method was used to load the platinum component, that is, the sample loaded ...

Embodiment 3

[0032] Mix 30% sodium silicate aqueous solution with 27% sulfuric acid solution to prepare silica sol. Add the required amount of SnCl with stirring 4 5H 2 O modified aluminum sol, continued to stir at room temperature for 30 minutes, placed the obtained sol in an oven at 70°C to dry overnight, then pulverized the obtained sample, sieved, and calcined at 750°C for 3 hours to obtain a modified silica carrier.

[0033] The obtained tin-containing silicon oxide carrier is loaded with platinum and other metal components by the co-impregnation method, that is, the required amount of H for impregnating the above carrier 2 PtCl 6 Aqueous solution of soluble salts of other metal additives for 24 hours, then dried at 60°C, calcined at 530°C in air flow for 3 hours, then treated with water vapor at 530°C for 4 hours, and finally treated with dry air at 530°C for 1 hour , to obtain the catalyst precursor.

[0034]The sample was reductively activated with hydrogen at 550°C for 60 minu...

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Abstract

The invention relates to a method for preparing a propylene catalyst by a propane dehydrogenation process and mainly solves the problem in the high-temperature and charcoal-burning process of the catalyst in the conventional preparation technology that a tin component is easy to reduce and separate out so as to influence the performance of the catalyst. The invention better solves the problem through the technical scheme comprising the following steps of: firstly, introducing the tin component into an aluminum sol by a sol-gel method, and drying and forming the mixture to obtain a tin-containing alumina supporter; secondly, loading a platinum component and other metallic aids by an impregnation method, namely impregnating the tin-containing alumina supporter into aqueous solution of soluble salt of platinum and other metals; and finally, drying, roasting and dechlorinating the product to obtain the platinum-tin catalyst. The method of the invention can be used for industrial preparation of the propylene catalyst by the propane dehydrogenation process.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for propane dehydrogenation to propylene. Background technique [0002] Propylene mainly comes from co-production or by-product of steam cracking and fluid catalytic cracking process in refineries, and can be widely used in the synthesis of polypropylene, polyacrylonitrile, acrolein, acrylic acid, propylene oxide, cumene and other materials. With the increasing demand for propylene, the traditional production process is difficult to meet the rapid growth of market demand. Propane is the main component of liquefied petroleum gas and is mainly used as a domestic fuel. The development of the process of producing low-carbon alkenes from low-carbon alkanes is of great significance for making full use of low-carbon alkanes to open up new sources of alkenes. At present, propane catalytic dehydrogenation technology is represented by Oleflex process of UOP Company and Catofin process of Lummus Compan...

Claims

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Application Information

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IPC IPC(8): B01J23/62B01J23/66B01J23/63B01J23/89B01J37/18B01J37/02C07C5/333C07C11/06
CPCY02P20/52
Inventor 吴文海李应成缪长喜吴省陈庆龄
Owner CHINA PETROLEUM & CHEM CORP
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