Check patentability & draft patents in minutes with Patsnap Eureka AI!

Nano copper-based catalyst and preparation method thereof

A catalyst and nano-copper technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as failure to achieve expected development, and achieve good catalytic efficiency and excellent stability.

Active Publication Date: 2018-09-21
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the study of the catalytic system for the hydrogenation of ethylene carbonate to alcohol, the performance of the catalyst for hydrogenation has been greatly improved, but it still has not achieved the expected development.

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
  • Nano copper-based catalyst and preparation method thereof
  • Nano copper-based catalyst and preparation method thereof
  • Nano copper-based catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The invention provides a nano-copper-based catalyst and a preparation method thereof. The preparation method of the nano-copper-based catalyst comprises the following steps: (1) dissolving a copper source, a silicon source, a templating agent and an auxiliary agent in a solvent to obtain a precursor (2) mix the precursor mixed solution obtained in step (1) with a precipitant, and stir to obtain a mixed solution; (3) heat and evaporate the mixed solution obtained in step (2), and obtain a solid after solid-liquid separation Composite; (4) calcining the solid composite obtained in step (3), and then reducing and activating it to obtain a nano-copper-based catalyst. The nano-copper-based catalyst prepared by the invention has good catalytic efficiency in the reaction of catalytic hydrogenation of ethylene carbonate to co-produce methanol and ethylene glycol. At the same time, the catalyst has excellent stability in the cycle test.

[0028] Specifically, as one aspect of t...

Embodiment 1

[0036] Embodiment 1 Precipitation method prepares nanometer Cu / SiO 2 -1 catalyst

[0037] Preparation:

[0038] (1) At room temperature, 8.6g of Cu(NO 3 ) 2 ·3H 2 O. 25g of tetraethyl orthosilicate, 1.5g of cetyltrimethylammonium bromide and 0.5g of β-cyclodextrin were dissolved in a mixture of 150mL of deionized water and 50mL of ethanol, and ultrasonically stirred for 30min until the dissolution was complete. Obtain the precursor mixed solution;

[0039] (2) Add 0.5mol / L ammonium carbonate solution and the precursor mixed solution obtained in step (1) dropwise at the same time, adjust the pH to keep it at about 9.0, and obtain the mixed solution after stirring for 4 hours;

[0040] (3) Heat the mixed solution obtained in step (2) to 85° C. to evaporate and remove part of the liquid, stop heating after the pH drops to 6-7, filter the obtained mixed solution, and wash the obtained precipitate with deionized water and ethanol After washing and filtering, drying at 90°C for ...

Embodiment 2

[0043] Embodiment 2 Precipitation method prepares nanometer Cu / SiO 2 -2 Catalyst

[0044] Preparation:

[0045] (1) At room temperature, 9.6g of Cu(NO 3 ) 2 ·3H 2 O. 25g of tetraethyl orthosilicate, 1.5g of P123 and 1.0g of β-cyclodextrin were dissolved in a mixture of 150mL of deionized water and 50mL of ethanol, and ultrasonically stirred for 30min until the solution was completely dissolved to obtain a precursor mixture;

[0046] (2) drop the 0.25mol / L ammonium carbonate solution and the precursor mixed solution obtained in step (1) simultaneously, adjust the pH to be kept at about 8.5, and obtain the mixed solution after stirring for 4 hours;

[0047] (3) Heat the mixed solution obtained in step (2) to 75° C. to evaporate and remove part of the liquid, stop heating after the pH drops to 6-7, filter the obtained mixed solution, and wash the obtained precipitate with deionized water and ethanol After washing and filtering, drying at 95°C for 14 hours, a solid complex wa...

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

Provided are a nano copper-based catalyst and a preparation method thereof. The preparation method of the nano copper-based catalyst comprises the following steps that (1) a copper source, a silicon source, a template agent and solubilizer are dissolved in a solvent to obtain a precursor mixed liquid; (2) the precursor mixed liquid obtained in step (1) and a precipitating agent are mixed and stirred to obtain a mixed liquid; (3) the mixed liquid obtained in step (2) is heated and evaporated, and then solid-liquid separation is carried out on the mixed liquid to obtain a solid compound; and (4)the solid compound obtained in step (3) is calcined, and then reduction activation is carried out to obtain the nano copper-based catalyst. The nano copper-based catalyst and the preparation method thereof have the advantages that the prepared nano copper-based catalyst has good catalytic efficiency in the reaction of ethylene carbonate catalyzing hydrogenated combined producing methanol and ethanediol, and the catalyst has excellent stability performance in cycling experiments.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a nanometer copper-based catalyst and a preparation method thereof. Background technique [0002] In recent years, the environmental pollution and greenhouse effect caused by carbon dioxide have become increasingly serious, and this problem has attracted the attention of many scientific researchers at home and abroad. CO 2 It is the final product of carbon-containing compounds, the cheapest compound in the carbon family, and the most abundant carbon resource in nature. Therefore, research and development of CO 2 The comprehensive utilization of resources has very important economic value and practical significance. [0003] Methanol and ethylene glycol are two important products in the chemical industry. Methanol is known as "methanol economy" and has a wide range of uses. It is not only an important organic chemical raw material, a high-quality clean...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J37/03C07C29/132C07C31/04C07C31/20
CPCB01J23/72B01J37/0018B01J37/035C07C29/132C07C31/04C07C31/202Y02P20/52
Inventor 王利国刘佳驹李会泉杨延米张婵娟贺鹏曹妍
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com