Anti-sintering catalyst for preparing low-carbon olefin by low-carbon alkane dehydrogenation and preparation method thereof

A dehydrogenation catalyst, a technology for low-carbon alkanes, applied in the directions of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve the problems that affect the performance of catalysts, metal particles are not easy to aggregate and grow, and they are easy to aggregate and grow. Enhance anti-coking ability, inhibit cracking hydrogenolysis, high dispersion effect

Active Publication Date: 2013-12-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that in the existing preparation technology, the metal particles of the catalyst are easy to aggregate and grow up in the process of high temperature and charcoal burning, which affects the performance of the catalyst. It provides a new anti-sintering low-carbon alkane d

Method used

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  • Anti-sintering catalyst for preparing low-carbon olefin by low-carbon alkane dehydrogenation and preparation method thereof
  • Anti-sintering catalyst for preparing low-carbon olefin by low-carbon alkane dehydrogenation and preparation method thereof

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Embodiment 1

[0026] Get 60g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) be dissolved in 200ml deionized water, then by the amount of substance Al:Mg is the mixed aqueous solution of 1:1 preparation aluminum nitrate solution and magnesium nitrate; o C, under vigorous stirring, slowly drop the mixed aqueous solution into 5% ammonia water to form a precipitate, control the pH value to be about 10, filter the precipitate at room temperature overnight, wash, and wash at 120 o C drying, crushing, sieving, at 700 o C was calcined for 3 hours to obtain composite alumina supports with different proportions.

[0027] The obtained composite alumina support is loaded with platinum and tin components by impregnation technology, that is, the obtained support is impregnated with chloroplatinic acid (H 2 PtCl 6 6H 2 O, 0.16g) and tin chloride (SnCl 4 5H 2 O, 0.18g) in aqueous solution (10ml) for 24 hours (metal platinum loading 0.4%, Pt:Sn=1:2), then 60 o C drying, 530 in air flow o C roasting f...

Embodiment 2

[0031] The carrier and catalyst were prepared according to the method of Example 1, except that the ratio of Al:Mg was 2:1, the loading of metal platinum was 0.5%, and the pH value of the precipitation was controlled to be about 9. The obtained catalyst was marked as B.

[0032]

Embodiment 3

[0034] Carrier and catalyzer are prepared by the method of embodiment 1, and difference is that precipitation pH value control is about 8, and chloroplatinic acid (H 2 PtCl 6 6H 2 O, 0.04g), the resulting catalyst is denoted as C.

[0035]

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Abstract

The invention relates to a platinum-tin catalyst of low-carbon alkane dehydrogenation and a preparation method thereof, and mainly solves the problem that in the prior art, in high temperature and carbon burning processes of a catalyst, metal platinum particles are easy to coalesce to grow up to affect the stability of the catalyst. According to the platinum-tin catalyst of low-carbon alkane dehydrogenation and the preparation method thereof, a technical scheme is adopted to well solve the problem, the technical scheme is shown as follows: first introducing assistants of alkalinous metals such as calcium, magnesium and the like into an alumina carrier by a coprecipitation method to get a compound metal oxide carrier, then using a dipping method to load tin and platinum components, namely dipping an aqueous solution of soluble salts of the platinum and tin components, and thus obtaining the platinum-tin catalyst by drying, roasting and water vapor treatment. The platinum-tin catalyst of low-carbon alkane dehydrogenation and the preparation method thereof can be used in industrial preparation of the catalyst for preparing low-carbon olefin by low-carbon alkane dehydrogenation.

Description

technical field [0001] The invention relates to a catalyst for producing low-carbon olefins by dehydrogenating sintering-resistant low-carbon alkanes 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 dehydrogen...

Claims

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Application Information

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IPC IPC(8): B01J23/62C07C5/333C07C11/06C07C11/09
CPCY02P20/52
Inventor 吴文海吴省樊志贵马春景曾铁强缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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