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a co 2 Cycloaddition cocatalysts and their applications in cycloaddition reactions

A co-catalyst and cycloaddition technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, 3/13 group organic compounds without C-metal bonds, etc., can solve epoxy The problem of low catalytic activity, poor selectivity, and difficulty in separating the catalyst from the product can be solved, so as to achieve the effect of increasing the yield, good selectivity, and good catalytic activity.

Active Publication Date: 2020-02-21
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homogeneous catalysts mainly include organic bases such as ionic liquids, alkali metals, N-heterocyclic carbene, and DBU, and transition metal complexes. Among them, quaternary ammonium salts are a class of cycloaddition catalysts that were used earlier, and the typical ones are tetrabutyl Butyl ammonium bromide (TBAB), tetrabutyl ammonium iodide (TBAI), etc., but the catalytic activity of this type of catalyst for epoxides is not high, and the selectivity is not good, and the reaction process is sometimes accompanied by the formation of polymerization products
In addition, the use of homogeneous catalysts also has the problem of difficulty in separating the catalyst from the product after the reaction

Method used

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  • a co <sub>2</sub> Cycloaddition cocatalysts and their applications in cycloaddition reactions
  • a co <sub>2</sub> Cycloaddition cocatalysts and their applications in cycloaddition reactions
  • a co <sub>2</sub> Cycloaddition cocatalysts and their applications in cycloaddition reactions

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] The preparation of embodiment 1 sample GdL

[0084] The organic ligand 1-(4-benzoic acid)-1 hydrogen-pyrazole-3,5-dicarboxylic acid and gadolinium nitrate were dissolved in CH at a molar ratio of 1:1 3 Mixed solvent of CN and water (volume ratio CH 3 CN: water=1:1) to obtain a solution; the concentration of gadolinium nitrate in the solution is 0.1mol / L. Put the above solution into a closed hydrothermal kettle, keep it at 130°C for 5 days, centrifuge the obtained solid, and dry it in vacuum to obtain the rare earth organic framework crystal material, which is designated as sample GdL.

Embodiment 2

[0085] Preparation of Example 2 Sample EuL

[0086]The organic ligand 1-(4-benzoic acid)-1 hydrogen-pyrazole-3,5-dicarboxylic acid and europium nitrate were dissolved in CH at a molar ratio of 1:1 3 Mixed solvent of CN and water (volume ratio CH 3 CN: water=1:1) to obtain a solution; the concentration of gadolinium nitrate in the solution is 0.5mol / L. Put the above solution into a closed hydrothermal kettle, keep it at 150°C for 1 day, centrifuge the obtained solid, and dry it in vacuum to obtain the rare earth organic framework crystal material, which is recorded as sample EuL.

Embodiment 3

[0087] The preparation of embodiment 3 sample TbL

[0088] The organic ligand 1-(4-benzoic acid)-1 hydrogen-pyrazole-3,5-dicarboxylic acid and terbium nitrate were dissolved in CH at a molar ratio of 1:1 3 Mixed solvent of CN and water (volume ratio CH 3 CN: water=1:1) to obtain a solution; the concentration of gadolinium nitrate in the solution is 0.3mol / L. Put the above solution into a closed hydrothermal kettle, keep it at 140°C for 3 days, centrifuge the obtained solid, and dry it in vacuum to obtain the rare earth organic framework crystal material, which is designated as sample TbL.

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Abstract

The invention discloses a CO2 cycloaddition co-catalyst. The CO2 cycloaddition co-catalyst is characterized by comprising a rare earth organic framework crystal material and tetra-alkyl ammonium halide. The chemical formula of the rare earth organic framework crystal material is [LnL(H2O)2].H2O, wherein Ln represents a rare earth element, and L represents an organic ligand formed by 1-(4-benzoicacid)-1-hydrogen-parazole-3,5-dicarboxylic acid. The rare earth organic framework crystal material has good heat stability, air stability, acid-base stability and solvent stability, and belongs to a multi-functional crystal material. The co-catalyst has good catalytic activity and good selectivity, is recyclable, and after applying the co-catalyst, the yield of a CO2 cycloaddition reaction can be greatly improved.

Description

technical field [0001] This application relates to a CO 2 The invention relates to a cycloaddition cocatalyst and its application in a cycloaddition reaction, belonging to the fields of crystal material, organic and catalytic synthesis. Background technique [0002] CO 2 It is the main factor that causes the greenhouse effect, but it is also a green and non-toxic C that widely exists in nature. 1 resource. If the CO in the environment can be 2 Recycling and transforming it into useful living and industrial raw materials is a huge contribution to the development of society no matter from the perspective of environmental protection or resource utilization. Today, researchers have developed various processes to convert carbon dioxide into useful products such as carbonates, polycarbonates, urethane derivatives and carboxylic acids. Of all the transformations, the reaction of carbon dioxide with epoxides to form five-membered cyclic carbonates has been extensively studied a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J31/02C07D317/36C07D317/44C07D317/34C09K11/06C07F5/00C07D231/14C07C211/63G01N21/64B01J20/22B01D53/02
CPCB01D53/02B01J20/226B01J31/0239B01J31/2217B01J35/0006B01J35/004C07B2200/13C07D317/34C07D317/36C07D317/44C07F5/003C09K11/06G01N21/643G01N2021/6432Y02P20/151
Inventor 陈莲敬谭江飞龙洪茂椿
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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