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Catalyst for low-carbon alkane dehydrogenation 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 deactivation of catalyst coke deposition, slow deactivation rate of catalyst coke deposition, and the like, and achieves high performance. stable effect

Active Publication Date: 2013-04-24
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 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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  • Catalyst for low-carbon alkane dehydrogenation and preparation method thereof
  • Catalyst for low-carbon alkane dehydrogenation and preparation method thereof
  • Catalyst for low-carbon alkane dehydrogenation and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] In 300.2g of pseudo-boehmite raw powder main material, add 9.0g of turnip powder and mix evenly, then add 130ml of mixed solution containing catalyst active components, including SnCl 4 ·5H 2 O, 7.4g; NaNO 3 , 2.2g; La(NO 3 ) 3 ·6H 2 O, 2.5g; Zn(NO 3 ) 2 ·6H 2 O, 0.91g, extruded after kneading fully, placed at room temperature for 12 hours, then kept at 90°C for 3 hours, then dried at 120°C for 10 hours, pelletized and treated at 750°C to obtain a tin-containing composite carrier.

[0026] The composite alumina support obtained adopts the impregnation technique to support the platinum component, that is, the chloroplatinic acid (H 2 PtCl 6 6H 2 O, 2.23g) in aqueous solution for 24 hours (metal platinum loading 0.4%, Pt:Sn=1:2), then dried at 60°C, calcined at 530°C for 3 hours in air flow, and then treated with water vapor at 530°C After 4 hours, dry air was finally passed through at 530°C for 1 hour to obtain a catalyst sample, which was denoted as A. The co...

Embodiment 2

[0029] Catalyst is prepared by the method of embodiment 1, and difference is with pseudo-boehmite former powder 285.7g; SnCl 4 ·5H 2 O, 2.4g; NaNO 3 , 1.8g; Ce(NO 3 ) 3 ·6H 2 O, 3.0g; H 2 PtCl 6 6H 2 O, 1.6g; without Zn (NO 3 ) 2 ·6H 2 O. Gained catalyst composition is shown in Table 1, is recorded as B, and reaction result is shown in Table 2, and reaction condition is the same as embodiment 1.

Embodiment 3

[0031] Catalyst is prepared by the method of embodiment 1, and difference is to use pseudo-boehmite former powder 345.7g; SnCl 4 ·5H 2 O, 0.7g; NaNO 3 , 0.3g; La(NO 3 ) 3 ·6H 2 O, 0.4g; H 2 PtCl 6 6H 2 O, 1.3g; Eu 2 o 3 , 15.28g; without Zn (NO 3 ) 2 ·6H 2 O. The obtained catalyst composition is shown in Table 1, and is recorded as C, and the reaction results are shown in Table 2, and the reaction conditions are the same as in Example 1.

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Abstract

The invention relates to a catalyst for preparing low-carbon alkenes by low-carbon alkane dehydrogenation and a preparation method thereof. The invention mainly solves the problems of high inactivation tendency of carbon deposit and poor stability of the catalyst in the high-temperature service process in the prior art. The technical scheme is as follows: metal tin and other transition metal assistants are introduced into the supporter in the alumina supporter precursor kneading process, and extruded to form the composite metal oxide supporter; and an impregnation method is utilized to support the platinum compound, i.e. a platinum-impregnated soluble salt water solution is roasted by drying and treated with steam to obtain the platinum-tin catalyst. The technical scheme well solves the problems, and can be used in industrial production of the catalyst for preparing low-carbon alkenes by low-carbon alkane dehydrogenation.

Description

technical field [0001] The invention relates to a low-carbon alkane dehydrogenation catalyst and a preparation method thereof. Background technique [0002] Propylene / isobutylene mainly comes from the co-production or by-product of steam cracking and fluid catalytic cracking in refineries, and can be widely used in the synthesis of polymers, gasoline additives, rubber and various chemical intermediates. With the increasing demand for low-carbon olefins, the traditional production process is difficult to meet the rapid growth of market demand. 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. 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...

Claims

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Application Information

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IPC IPC(8): B01J23/63C07C5/333C07C11/06C07C11/09
CPCY02P20/52
Inventor 吴文海吴省樊志贵马春景张磊缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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