Polymer supported catalyst and application thereof in aromatic selective chlorination reaction

A technology of polymer loading and polymer carrier, which is applied in the direction of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, chemical industry, etc. Regioselectivity, increased contact frequency, and large molecular weight effects

Active Publication Date: 2015-05-06
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] There are many applications of supported β-diketone metal complexes in the field of catalysts, but it is still rare to use them as catalysts for the selective chlorination of aromatic hydrocarbons

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 100g of toluene to the reaction flask, start stirring, heat to a constant temperature of 25°C, add 0.5g of polymer-loaded iron catalyst, and feed chlorine gas into the reaction system at a constant flow rate of 50mL / min, react under normal pressure, and detect the reaction by gas chromatography Process until the appearance of dichlorotoluene terminates the reaction.

Embodiment 2

[0046] Add 100g of toluene into the reaction flask, start stirring, heat to a constant temperature of 25°C, add 2.5g of polymer-loaded iron acetylacetonate catalyst, and feed chlorine gas into the reaction system at a constant flow rate of 50mL / min. The progress of the reaction was monitored until the appearance of dichlorotoluene ended the reaction.

Embodiment 3

[0048] Add 100g of toluene into the reaction flask, start stirring, heat to a constant temperature of 25°C, add 0.5g of polymer-supported iron catalyst and 0.005g of sulfur, and feed chlorine gas into the reaction system at a constant flow rate of 50mL / min, react under normal pressure, pass The progress of the reaction was detected by gas chromatography until the occurrence of dichlorotoluene to complete the reaction.

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PUM

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Abstract

The invention provides a polymer supported catalyst which comprises a polymer carrier and an inorganic metal salt / organic metal complex loaded to the polymer carrier. The invention also provides an application of the catalyst in an aromatic selective chlorination reaction. The polymer supported catalyst has large specific surface area, and the contact frequency is increased; the steric-hindrance effect is obvious, and the para-selectivity can be effectively improved; and moreover, when the catalyst is combined with sulfides, the para-selectivity of aromatic chlorination can be effectively improved, and the catalyst is stable in activity, mild in reaction conditions, simple in process and suitable for application and can be used for chlorination of all aromatic hydrocarbons and derivatives thereof.

Description

technical field [0001] The invention belongs to the field of organic synthesis, in particular to a combined catalyst for the selective chlorination of aromatic hydrocarbons, and also relates to the application of the combined catalyst. Background technique [0002] Polymer-supported catalysts are catalysts that use physical or chemical methods to load active substances on polymer carriers; they not only show the advantages of high reactivity and selectivity of homogeneous catalysts, but also take advantage of the advantages of heterogeneous catalysts, which are easy to separate and can be separated. The characteristics of recycling are therefore rapidly developed and applied to actual production. [0003] Linden GL and Farona M F disclosed in Journal of Catalysis, 1977, 48(1): 284-291 that a polymer catalyst loaded with vanadyl acetylacetonate was used for the epoxidation of olefins, and the selectivity reached 100%. [0004] C.P.Fei reported the application of polymer-load...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/30B01J31/22B01J31/26B01J31/36B01J31/34B01J31/28B01J31/32C07C25/02C07C17/12
CPCY02P20/50
Inventor 葛裕华任开路李婷婷
Owner SOUTHEAST UNIV
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