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Preparation method of highly dispersed Pd-IL/Al2O3 catalyst and application of same in selective hydrogenation reaction of acetylene

A catalyst, acetylene technology, used in physical/chemical process catalysts, catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of low ethylene selectivity, improve conversion rate, prevent excessive hydrogenation , the effect of superior catalytic performance

Active Publication Date: 2018-12-25
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional catalysts used in industry have very low selectivity to ethylene when the conversion of acetylene is high.

Method used

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  • Preparation method of highly dispersed Pd-IL/Al2O3 catalyst and application of same in selective hydrogenation reaction of acetylene
  • Preparation method of highly dispersed Pd-IL/Al2O3 catalyst and application of same in selective hydrogenation reaction of acetylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0024] Using the impregnation method, according to the load listed in Table 1, the metered palladium dichloride is mixed with DMF, after stirring evenly, the alumina carrier (specific surface area is 384m 2 / g) Evenly pour into the impregnating liquid, and use ultrasonic to make it disperse evenly. Immerse at room temperature for 12 hours and dry at 110°C for 12 hours to obtain a certain load of Pd / Al 2 o 3 catalyst. The dried Pd / Al 2 o 3 Put the catalyst into a tube furnace and bake it in the air, and bake it at 300°C for 2 hours to get highly dispersed Pd / Al 2 o 3 catalyst.

[0025] Using the impregnation method, weigh the ionic liquid (IL) according to the load listed in Table 1, and dissolve it in deionized water; after stirring evenly, weigh a certain amount of highly dispersed Pd / Al obtained by roasting 2 o 3 Catalyst, evenly poured into the well-mixed solution, and ultrasonically dispersed evenly, the wet carrier was impregnated at room temperature for 12h, and ...

Embodiment 5-7

[0027] Using the impregnation method, according to the load listed in Table 1, the metered palladium dichloride is mixed with DMF, after stirring evenly, the alumina carrier (specific surface area is 384m 2 / g) Evenly pour into the impregnating liquid, and use ultrasonic to make it disperse evenly. Immerse at room temperature for 12 hours and dry at 110°C for 12 hours to obtain a certain load of Pd / Al 2 o 3 catalyst. The dried Pd / Al 2 o 3 The catalyst is put into a tube furnace and calcined in the air, and calcined at 500°C for 2 hours to obtain highly dispersed Pd / Al 2 o 3 catalyst.

[0028] Using the impregnation method, weigh the ionic liquid (IL) according to the load listed in Table 1, and dissolve it in deionized water; after stirring evenly, weigh a certain amount of highly dispersed Pd / Al obtained by roasting 2 o 3 Catalyst, evenly poured into the well-mixed solution, and ultrasonically dispersed evenly, the wet carrier was impregnated at room temperature for 1...

Embodiment 8-10

[0030] Using the impregnation method, according to the load listed in Table 1, the metered palladium dichloride is mixed with DMF, after stirring evenly, the alumina carrier (specific surface area is 384m 2 / g) Evenly pour into the impregnating liquid, and use ultrasonic to make it disperse evenly. Immerse at room temperature for 12 hours and dry at 110°C for 12 hours to obtain a certain load of Pd / Al 2 o 3 catalyst. The dried Pd / Al 2 o 3 Put the catalyst into a tube furnace and bake it in the air, and bake it at 700°C for 2 hours to get highly dispersed Pd / Al 2 o 3 catalyst.

[0031] Using the impregnation method, weigh the ionic liquid (IL) according to the load listed in Table 1, and dissolve it in deionized water; after stirring evenly, weigh a certain amount of highly dispersed Pd / Al obtained by roasting 2 o 3 Catalyst, evenly poured into the well-mixed solution, and ultrasonically dispersed evenly, the wet carrier was impregnated at room temperature for 12h, and ...

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Abstract

The invention discloses a preparation method of a highly dispersed Pd-IL / Al2O3 catalyst and an application of the same in selective hydrogenation reaction of acetylene. The preparation method includesthe steps of 1), solving a precursor with a solvent to prepare a corresponding palladium compound impregnation solution; 2), evenly pouring an alumina carrier to the impregnation solution according to the requirement that the load of palladium, impregnating the alumina carrier in the impregnation solution, performing uniform dispersion by ultrasound, impregnating the impregnated carried at the room temperature and then drying an obtained product; 3), placing the dried product A in a tube furnace at the temperature of 200-800DEG C for 1-3 hours to obtain a Pd / Al2O3 catalyst; 4), weighing ionicliquid according to the requirement that the load of the ionic liquid is 10%-40%, dissolving the ionic liquid in deionized water, weighing the Pd / Al2O3 catalyst after even stirring, pouring the Pd / Al2O3 catalyst in a evenly stirred solution, performing uniform dispersion by ultrasonic, impregnating the impregnated carrier in the room temperature, and then performing drying to obtain the Pd-IL / Al2O3 catalyst. The Pd-IL / Al2O3 catalyst obtained is applied to the selective hydrogenation reaction of the acetylene, and excellent catalytic performance is achieved.

Description

(1) Technical field [0001] The invention relates to a highly dispersed Pd-IL / Al 2 o 3 Catalyst preparation and its application in the selective hydrogenation of acetylene. (2) Technical background [0002] As an important organic chemical raw material, ethylene is widely used in various fields. The ethylene raw material gas obtained from industrial production often contains 1% acetylene. The trace amount of acetylene mixed in the ethylene feed gas will poison the catalyst of the subsequent ethylene polymerization reaction and reduce the quality of polyethylene products. Therefore, it is of great significance to improve the quality of downstream products to remove acetylene in raw gas to less than 5ppm. [0003] In ethylene units, solvent absorption and selective hydrogenation are often used to remove acetylene from ethylene raw materials. Compared with the solvent absorption method, catalytic selective hydrogenation has less pollution than the absorption method, and can...

Claims

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Application Information

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IPC IPC(8): B01J31/26C07C5/05C07C11/04
CPCB01J31/26C07C5/05C07C2531/26C07C11/04Y02P20/52
Inventor 李小年徐逸琦张群峰徐浩丰枫赵佳
Owner ZHEJIANG UNIV OF TECH
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