Chitosan porous microballoon loaded copper iodide catalyst as well as preparation method and application thereof

A porous microsphere, cuprous iodide technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc. The production cost and environmental pollution are reduced, the equipment requirements are low, and the preparation process is simple.

Inactive Publication Date: 2013-07-31
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since most copper reaction systems are homogeneous, catalysts are difficult to recycle and often require the addition of stable ligands

Method used

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  • Chitosan porous microballoon loaded copper iodide catalyst as well as preparation method and application thereof
  • Chitosan porous microballoon loaded copper iodide catalyst as well as preparation method and application thereof
  • Chitosan porous microballoon loaded copper iodide catalyst as well as preparation method and application thereof

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preparation example Construction

[0029] 1. Preparation of mixed solution: Take 5g of pharmaceutical grade chitosan powder (molecular weight: 100,000, degree of deacetylation: 95%) and polyethylene glycol (molecular weight: 20,000), dissolve in 2% 100ml acetic acid solution to prepare Mix the solution; add an appropriate amount of glutaraldehyde aqueous solution dropwise to the solution under high-speed stirring, with a cross-linking degree of 0.3%, continue stirring for 2 hours to form a homogeneous solution, and let it stand for 12 hours to defoam.

[0030] 2. Preparation of chitosan porous microspheres: drop the above mixed solution into a NaOH coagulation bath (concentration is 5%), and the droplets gradually precipitate in the coagulation bath to form white Semi-IPN microspheres; After the microspheres are washed with water until they are neutral, they are placed in a 90 oC water bath for continuous extraction for 6-8 hours to selectively dissolve the polymer porogen components to achieve pore formation; f...

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PUM

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Abstract

The invention discloses a chitosan porous microballoon loaded copper iodide catalyst as well as a preparation method and an application thereof, belonging to the technical filed of preparation process of chemical catalysts. The catalyst is characterized in that the carrier of the catalyst is chitosan porous microballoon, the diameter of microballoon is 0.5-3mm, the surface aperture is 5-30mm and the inner aperture is 1-10 mu m; and the active component is copper iodide and the mass percent of the active component is 10-30% of the carrier. When the chitosan porous microballoon loaded copper iodide catalyst provided by the invention is used in a coupling reaction for catalyzing Heck, the catalyst has excellent and stable property, and is beneficial to reducing the cost and environment pollution.

Description

Technical field: [0001] The invention relates to a chitosan porous microsphere-loaded cuprous iodide catalyst, a preparation method and an application thereof, and belongs to the technical field of chemical catalyst preparation technology. Background technique: [0002] At present, transition metal-catalyzed organic coupling reactions have been widely used in industrial production and academic research. Among these transition metal catalysts, the palladium catalytic system has been widely studied and applied due to its high catalytic activity and substrate applicability, and many new homogeneous or heterogeneous palladium catalysts have been continuously synthesized and reported. Compared with the relatively mature palladium catalyst, the main advantages of the cuprous catalyst are the low price of copper, low environmental pollution and toxicity. However, since most copper reaction systems are homogeneous, the catalysts are difficult to recycle and often require the additi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/30C07C69/618C07C67/343
Inventor 齐陈泽曾敏峰
Owner SHAOXING UNIVERSITY
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