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Preparation method of precious metal-containing low-carbon alkane dehydrogenation catalyst carrier

A technology for dehydrogenation catalysts and low-carbon alkanes, which can be used in catalyst carriers, metal/metal oxide/metal hydroxide catalysts, hydrocarbons, etc., and can solve the problems of affecting catalyst performance and easy aggregation and growth of metal particles. Achieve the effect of enhancing the anti-coking ability, uniform distribution and high dispersion.

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

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Problems solved by technology

[0005] The technical problem 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. A method for preparing a carbon olefin catalyst carrier. The catalyst prepared by the catalyst carrier obtained by the preparation method is used in the process of dehydrogenating low-carbon alkanes to produce low-carbon olefins. Under the conditions of high temperature and charcoal regeneration, metal particles are not easy to aggregate and grow. The advantage of high stability

Method used

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Examples

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Embodiment 1

[0021] 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.

[0022] The composite alumina support that obtains adopts impregnation technology to load platinum and tin components, that is, the aqueous solution of required amount of chloroplatinic acid and tin chloride is impregnated with the obtained alumina support at room temperature for 24 hours (metal platinum loading 0.4%, Pt:Sn=1:2), then 60 o C drying, 530 in air flow o C roasting for 3 hours,...

Embodiment 2

[0026] The carrier and catalyst were prepared according to the method of Example 1, except that the ratio of Al:Mg was 2:1 according to the amount of substance, and the obtained catalyst was marked as B.

[0027]

Embodiment 3

[0029] The carrier and catalyst were prepared according to the method of Example 1, except that the ratio of Al:Mg was 4:1 according to the amount of substance, and the obtained catalyst was marked as C.

[0030]

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Abstract

The invention relates to a preparation method of a precious metal-containing low-carbon alkane dehydrogenation platinum-tin catalyst carrier, 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 preparation method, first a technical scheme is adopted to well solve the problem, the technical scheme is shown as follows: alkalinous metal assistants of calcium, magnesium and the like are introduced into an alumina carrier by a coprecipitation method to get a compound metal oxide carrier, and the preparation method can be used in industrial preparation of the catalyst for preparation of low carbon olefins by low-carbon alkane dehydrogenation.

Description

technical field [0001] The invention relates to a method for preparing a catalyst carrier used for dehydrogenating low-carbon alkanes to produce low-carbon olefins. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J23/62C07C11/06C07C5/333
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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