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Carrier of catalyst for light alkane dehydrogenation preparation of light olefin and use thereof

A technology of catalyst carrier and low-carbon olefins, applied in the direction of catalyst carrier, hydrocarbons, hydrocarbons, etc., can solve the problems of low loss of precious metals, loss of precious metals, poor wear resistance of dehydrogenation catalysts, etc., to reduce the loss of precious metals , enhance the effect of wear resistance

Active Publication Date: 2017-05-03
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 the wear resistance of the dehydrogenation catalyst is poor, and the precious metals distributed on the outer surface are easily lost with the wear of the carrier during use; a new low-carbon alkane dehydrogenation catalyst carrier is provided , the catalyst using this carrier is used in the process of dehydrogenating light alkanes to light olefins, especially for moving bed reactors, which has the advantages of good wear resistance and low loss of precious metals

Method used

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  • Carrier of catalyst for light alkane dehydrogenation preparation of light olefin and use thereof
  • Carrier of catalyst for light alkane dehydrogenation preparation of light olefin and use thereof
  • Carrier of catalyst for light alkane dehydrogenation preparation of light olefin and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Get 751.56g aluminum nitrate (Al(NO 3 ) 3 9H 2 O), 205.12g magnesium nitrate (Mg(NO 3 ) 2 6H 2 O), 58.16g nickel nitrate (Ni(NO 3 ) 2 6H 2O) be dissolved in 2000ml deionized water; at 25 DEG C, under vigorous stirring, 6% by weight of ammonia water is slowly added dropwise to the mixed aqueous solution to form a precipitate, control the pH value to 6.7, and filter the precipitate at room temperature overnight , washed, extruded, dried at 80°C until the water content is about 10-30%, pelletized into cylindrical particles of Ф5×5mm, shaped into a spherical shape (diameter ~ 4mm) in a spherical granulator, and roasted at 720°C for 10 hours, a spherical carrier core was obtained. Roll the carrier evenly in a rolling ball equipment while spraying with 15% aluminum sol at room temperature. After 30 minutes, a composite carrier with a shell with a certain thickness is obtained. After drying at 120°C, bake at 1200°C for 8 hours to obtain a catalyst carrier. XRD charact...

Embodiment 2

[0029] Get 752.12g aluminum nitrate (Al(NO 3 ) 3 9H 2 O), 148.71g magnesium nitrate (Mg(NO 3 ) 2 6H 2 O), 101.47g copper nitrate (Cu(NO 3 ) 2 6H 2 O) be dissolved in 2000ml deionized water; at 20 DEG C, under vigorous stirring, 15% by weight of ammonia water is slowly added dropwise to the mixed aqueous solution to form a precipitate, control the pH value to 7.8, and filter the precipitate at room temperature overnight , washed, extruded, baked at 100°C until the water content is about 10-30%, pelletized into cylindrical particles of Ф5×5mm, shaped into a spherical shape (diameter ~ 4mm) in a spherical granulator, and roasted at 750°C for 8 Hours, the inner core of the composite magnesium aluminate carrier was obtained. The carrier is evenly rolled in the rolling ball equipment and sprayed with 20% aluminum sol at 40°C. After 30 minutes, a composite carrier with a shell with a certain thickness is obtained. After drying at 120°C, it is baked at 1100°C for 12 hours to o...

Embodiment 3

[0033] Get 751.36g aluminum nitrate (Al(NO 3 ) 3 9H 2 O), 133.33g magnesium nitrate (Mg(NO 3 ) 2 6H 2 O), 139.26g cobalt nitrate (Co(NO 3 ) 2 6H 2 O) be dissolved in 2000ml deionized water; at 26°C, under vigorous stirring, 20% by weight of ammonia water is slowly added dropwise to the mixed aqueous solution to form a precipitate, control the pH value to 7.2, and filter the precipitate after overnight at room temperature , washed, extruded, baked at 120°C until the water content is about 10-30%, pelletized into cylindrical particles of Ф5×5mm, shaped into a spherical shape (diameter ~ 4mm) in a spherical granulator, and roasted at 800°C for 5 Hours, the inner core of the composite magnesium aluminate carrier was obtained. The carrier is evenly rolled in the rolling ball equipment and sprayed with 25% aluminum sol at 40°C. After 30 minutes, a composite carrier with a shell with a certain thickness is obtained. After drying at 120°C, it is roasted at 1200°C for 8 hours t...

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Abstract

The invention relates to a carrier of a platinum catalyst for light alkane dehydrogenation and a use thereof. The carrier mainly solves the problem that the existing catalyst has poor wear resistance and the precious metal is easy to lose along with the carrier wear during the use. A preparation method of the platinum catalyst comprises coating the surface of a magnesium aluminate carrier with alumina or pseudo-boehmite sol through a spraying or rolling method to obtain an alumina housing, carrying out drying and high temperature calcination to obtain a compound metal oxide carrier having the inert housing, loading platinum and tin components through an impregnation method through impregnation of a soluble salt aqueous solution of platinum, and carrying out drying, roasting and vapor treatment to obtain the platinum catalyst. Propane / isobutane as a raw material contacts with the catalyst and undergoes a reaction under conditions of a reaction temperature of 520 to 620 DEG C, reaction pressure of 0 to 0.4MPa, an alkane mass space velocity of 0.1 to 8.0h<-1> and a H2O / CnH2n+2 volume ratio of 1 to 18 to produce propylene / isobutene so that the problem is solved. The platinum catalyst carrier can be used in industrial preparation of a catalyst for light alkane dehydrogenation preparation of a light olefin.

Description

technical field [0001] The invention relates to a catalyst carrier used for dehydrogenating low-carbon alkanes to produce low-carbon olefins and its application. 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, the alkane catalytic dehydrogenation technology is...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J23/755B01J23/72B01J23/75B01J23/34B01J23/26B01J23/14B01J23/889B01J23/06B01J23/89B01J23/656B01J23/652B01J23/62B01J23/60B01J35/10C07C5/333C07C11/09C07C11/06
CPCY02P20/52
Inventor 吴文海刘剑锋缪长喜姜冬宇樊志贵
Owner CHINA PETROLEUM & CHEM CORP
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