Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Palladium-copper supported sub-nanometer catalyst and preparation method thereof

A supported catalyst and catalyst technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, hydrogenation hydrocarbon production, etc., can solve the problems of multiple and complex molecules and reactions, and achieve low catalytic cost, high selectivity, and control Effect of Reactor Temperature

Inactive Publication Date: 2019-05-03
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF9 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the Pd-Cu catalysts disclosed in the above patents are mainly used in the selective hydrogenation reaction of C2-C3 fractions. The selective hydrogenation reaction of C4 involves more and more complex molecules and reactions, and C2-C3 cannot be selectively hydrogenated. The hydrogenation catalyst is directly applied to the C4 system

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
  • Palladium-copper supported sub-nanometer catalyst and preparation method thereof
  • Palladium-copper supported sub-nanometer catalyst and preparation method thereof
  • Palladium-copper supported sub-nanometer catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of PdCu / Al by Co-impregnation 2 o 3 Catalyst, wherein the Pd content is 0.025%, the Cu content is 0.26%, and the alumina support is γ-Al 2 o 3 , the specific surface area is 160m 2 / g, the specific steps are as follows:

[0053] (a) Calculate the consumption of corresponding precursor copper nitrate and palladium nitrate, and configure solution according to the volume of corresponding solution impregnated with aluminum oxide equivolume;

[0054] (b) Add the solution dropwise evenly on the alumina carrier, so that the carrier is just saturated and absorb the prepared solution; (c) Aging the impregnated carrier at room temperature for 1 hour, and drying at 80° C. overnight;

[0055] (d) Calcining the catalyst obtained in (c) at 450° C. for 3 h.

[0056] Perform TPR characterization of the obtained catalyst to obtain its surface oxide state, such as figure 1 As shown, among them, Pd, Cu monometallic catalysts were also characterized by TPR as reference ma...

Embodiment 2

[0060] Preparation of PdCu / SiO by Step-wise Impregnation Method 2 Catalyst, the specific surface area of ​​silica is 230m 2 / g, Pd content 0.06%, Cu content 0.5%, concrete steps are as follows:

[0061] (a) Calculate the amount of precursor cupric chloride and palladium chloride according to the load data, and prepare the solution according to the volume corresponding to the equal volume impregnation of silicon oxide;

[0062] (b) the cupric chloride solution is evenly added dropwise on the catalyst carrier, so that the carrier is just saturated and adsorbed with the prepared solution;

[0063] (c) Aging for 1 hour and drying at 100°C for 5 hours;

[0064] (d) calcining at 500°C for 3h;

[0065] (e) palladium chloride solution is evenly added dropwise on the catalyst carrier, so that the carrier is just saturated and adsorbed with the prepared solution;

[0066] (f) Aging for 3h, drying at 80°C for 8h;

[0067] (g) Calcination at 400°C for 3h.

[0068] After reducing the...

Embodiment 3

[0071] Preparation of PdCu / SiO by Galvanic displacement method 2 Catalyst, wherein Pd content 0.12%, Cu content 0.8%, concrete steps are as follows:

[0072] (a) calculate the consumption of precursor copper nitrate and palladium nitrate according to load data;

[0073] (b) impregnating copper nitrate equal volumes on the silicon oxide carrier, the specific steps are the same as (b)-(d) in Example 2;

[0074] (c) reducing the catalyst obtained in (b) at 250° C. for 1 h;

[0075] (d) carrying out the metal replacement reaction of the catalyst obtained in (c) in an ultrasonic reactor, and the replacement metal solution is a palladium nitrate solution;

[0076] (e) Vacuum drying at room temperature for 24 h.

[0077] The catalyst was characterized by CO-infrared adsorption, and similar figure 2 In the spectra, the bulk phase adsorption peak of Pd disappears, which proves the existence of subnanometer Pd. The catalyst was characterized by EXAFS, and data fitting was carried ...

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

PropertyMeasurementUnit
Specific surface areaaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to an unsaturated C4 selective hydrogenation catalyst, and a preparation method and an application thereof, and concretely relates to a palladium-copper supported sub-nanometer catalyst and a preparation method thereof. The catalyst comprises Pd, Cu and a carrier. The catalyst of the invention is used in selective hydrogenation to remove C4 alkyne and diolefin, and makes unsaturated C4 molecules converted into butene by hydrogenation in order to achieve the purpose of removing unsaturated C4.

Description

technical field [0001] The invention relates to a catalyst used in a C4 selective hydrogenation process and its preparation and application. Specifically, it is a subnanoscale bimetallic catalyst and its application in the selective hydrogenation of unsaturated C4. Background technique [0002] Low-carbon olefins (C 2 -C 4 ) is an important organic raw material, which is widely used in the production of plastics by polymerization, the synthesis of three major organic materials, and the synthesis of fine chemicals. 1-butene, 2-butene and isobutene in C4 are common polymerized monomers, however, the cracked C4 fraction contains a certain amount of diolefins and alkynes, which will seriously affect the subsequent polymerization of monoolefins, such as poisoning the catalyst , affecting the reaction rate, reducing product quality, endangering production safety, etc. Therefore, it is necessary to carry out strict de-alkyne and de-diene treatment on industrial raw material gas....

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): B01J23/89B01J35/02C07C5/05C07C11/08
Inventor 侯瑞君孙克宁杨秋辰简洪超
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com