Aluminum oxide-loaded ionic liquid-palladium catalyst, preparation thereof and application thereof in hydrogenation reaction of acetylene

An alumina-supported, alumina-supported technology, applied in catalytic reactions, carbon compound catalysts, physical/chemical process catalysts, etc., can solve the problems of low ethylene selectivity, achieve high ethylene selectivity, improve ethylene selectivity, and process simple effect

Active Publication Date: 2019-01-11
ZHEJIANG UNIV OF TECH
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional catalysts used in industry have very ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Aluminum oxide-loaded ionic liquid-palladium catalyst, preparation thereof and application thereof in hydrogenation reaction of acetylene
  • Aluminum oxide-loaded ionic liquid-palladium catalyst, preparation thereof and application thereof in hydrogenation reaction of acetylene
  • Aluminum oxide-loaded ionic liquid-palladium catalyst, preparation thereof and application thereof in hydrogenation reaction of acetylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0038] Weigh a certain amount of PdCl 2 Dissolve in concentrated hydrochloric acid, transfer to a volumetric flask, add a certain amount of deionized water to the corresponding scale, and prepare a chloropalladium acid solution with a mass concentration of palladium of 0.001g / mL. According to the loading capacity and the proportioning ratio listed in Table 1, the metered chloropalladium acid solution and ionic liquid are mixed, and a certain amount of deionized water is added, after stirring evenly, the alumina carrier (specific surface area is 384m 2 / g) Pour into the impregnating solution, and ultrasonically disperse it evenly. Wet alumina was impregnated at room temperature for 12 hours and dried at 110° C. for 12 hours to obtain an alumina-supported ionic liquid-palladium catalyst capable of forming a special carbene-palladium structure.

Embodiment 7

[0040] In Example 7, the comparison of the texture properties of the alumina carrier before and after loading ionic liquid and Pd is shown in Table 1:

[0041] Table 1 Comparison of carrier texture properties before and after loading ionic liquid

[0042]

[0043] The data in Table 1 show that the supported ionic liquids in Al 2 o 3 A liquid film is formed on the surface of the carrier.

Embodiment 10

[0045] With reference to the operation of Example 9, the only difference is that the carrier is replaced with a specific surface area of ​​58m 2 / g of alumina to prepare an alumina-supported ionic liquid-palladium catalyst capable of forming a special carbene-palladium structure.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an aluminum oxide-loaded ionic liquid-palladium catalyst, preparation thereof and application thereof in the hydrogenation reaction of acetylene. The catalyst contains an aluminum oxide carrier, ionic liquid and a palladium compound, wherein the surface of the aluminum oxide carrier is loaded with the ionic liquid and the palladium compound; the palladium compound is selected from one of chloropalladic acid, palladium nitrate, palladium acetate, palladium acetylacetonate, palladium dichloride, ammonium tetrachloropalladate, sodium chloropalladate, tetraammine palladiumnitrate; cations of the ionic liquid are imidazole cations with different carbon chain lengths, and anions are chloride ions, bromide ions, hexafluorophosphate, tetrafluorophosphate or tetrafluoroborate; a layer of liquid film is formed on the surface of the carrier by the ionic liquid, and a carbene structure is further formed by the ionic liquid and the palladium compound; and the loading capacity of palladium in the catalyst is 0.03wt%-1wt%, and the loading capacity of the ionic liquid is 8wt%-40wt%. The catalyst is applied to the selective hydrogenation of acetylene so as to desorb acetylene, so that the selectivity of acetylene in the reaction is greatly improved.

Description

(1) Technical field [0001] The invention relates to an alumina-loaded ionic liquid-palladium catalyst, a preparation method thereof, and an application in the reaction of acetylene selective hydrogenation to ethylene. (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 remove the acetylene in the feed gas to below 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 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J31/02C07C11/04C07C5/09
CPCB01J31/0284B01J2231/645C07C5/09C07C2531/02C07C11/04Y02P20/52
Inventor 李小年张群峰徐逸琦蒋亦舒赵佳丰枫
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap