A method for preparing a palladium catalyst supported by chitosan-carboxymethyl cellulose composite nanoparticles

A technology of nano-microspheres and palladium catalysts, which is applied in the field of catalysis, can solve the problems of selectivity decline, etc., and achieve the effects of short reaction time, mild reaction conditions and high catalytic efficiency
CN109529944AActive Publication Date: 2019-03-29KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2019-03-29

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Abstract

A method for preparing a palladium catalyst supported by chitosan-carboxymethyl cellulose composite nanoparticles is disclosed. The method includes mixing chitosan with absolute alcohol to obtain a solution A; mixing carboxymethyl cellulose with an alkaline solution to obtain a solution B; adding the solution A dropwise into the solution B; reacting the mixture at room temperature under stirring;performing filtration and then absolute alcohol washing to obtain chitosan-carboxymethyl cellulose composite nanoparticles; adding the nanoparticles into absolute alcohol, then adding a palladium saltsolution, and reacting the liquid mixture at room temperature under magnetic stirring; performing filtration and washing with absolute alcohol, and vacuum drying to obtain the palladium catalyst supported by chitosan-carboxymethyl cellulose composite nanoparticles. The catalyst has good catalytic effects, a simple preparation process, a high catalytic efficiency, convenient separation and a low cost and has a good application prospect.
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Description

technical field

[0001] The invention belongs to the technical field of catalysis, and in particular relates to a preparation method of palladium catalyst supported by chitosan and carboxymethyl cellulose composite nano microspheres. Background technique

[0002] Ethylene is the most important basic raw material in petrochemical industry, known as "the mother of petrochemical industry". Selective hydrogenation of acetylene is a hot topic at present, and there are many reports at home and abroad, but its research content is mainly used to remove trace amounts of acetylene in the process of producing ethylene from petroleum hydrocarbon cracking. The process and catalysts of hydrogen to ethylene are rarely explored, and the corresponding large-scale industrial application has not been reported. Polymer-supported metal catalysts have become a research hotspot because of their high catalytic activity and stereoselectivity, good stability and reusability.

[0003] In recent years...

Claims

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