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Method for catalytically oxidizing cycloalkane through three-metal-center (CoCuZn) 2D MOFs/ultraviolet light

A catalytic oxidation and trimetallic technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc. Use, reduce the selectivity of cycloalkyl alcohols and cycloalkyl ketones, and increase the uncontrollability of the reaction system to achieve the effects of inhibiting disordered diffusion, high selectivity, and small environmental impact

Active Publication Date: 2021-11-05
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the industrial catalytic oxidation of naphthenes is mainly based on homogeneous Co 2+ or Mn 2+ As a catalyst, oxygen (O 2 ) is an oxidizing agent, in The main problem is that the reaction temperature is high, the reaction conditions are harsh, the selectivity of the target product is poor, and the increase of the reaction conversion will consume the selectivity of the partial oxidation product (Applied Catalysis A, General 2019, 575:120-131; Catalysis Communications 2019, 132:105809; Applied Catalysis A, General 2021, 609:117904;)
The main causes of the above problems are: (1) O2 oxidation of cycloalkane in the industry mainly undergoes disordered free radical diffusion process; (2) oxidation intermediate products, cycloalkyl hydroperoxide and The free radical thermal decomposition path is converted to the target oxidation products cycloalkanol and cycloalkanone, which increases the uncontrollability of the reaction system and reduces the selectivity of cycloalkyl alcohol and cycloalkyl ketone; (3) the oxidation intermediate product, cycloalkyl The oxidation of hydrogen peroxide is not fully utilized; (4) the activity of cycloalkanol and cycloalkanone is higher than that of substrate cycloalkane

Method used

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  • Method for catalytically oxidizing cycloalkane through three-metal-center (CoCuZn) 2D MOFs/ultraviolet light
  • Method for catalytically oxidizing cycloalkane through three-metal-center (CoCuZn) 2D MOFs/ultraviolet light
  • Method for catalytically oxidizing cycloalkane through three-metal-center (CoCuZn) 2D MOFs/ultraviolet light

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Experimental program
Comparison scheme
Effect test

Embodiment 36

[0026] Embodiment 36 is an enlarged experimental case.

Embodiment 1

[0028]Synthesis of metalloporphyrin trimetallic center (Co&Cu&Zn) 2D MOFs-1: 0.2910 g (1.00 mmol) of cobalt nitrate hexahydrate, 5,10,15,20-tetrakis(4-carboxyphenyl)copper porphyrin (CuTCPP) 0.0426g (0.050mmol), 5,10,15,20-tetrakis (4-carboxyphenyl) porphyrin zinc (ZnTCPP) 0.0427g (0.050mmol) was placed in a 50mL agate ball mill jar, room temperature, 600rpm, ball milling reaction 8.0 h. Stop ball milling once every 1.0h, release the gas in the ball mill tank. After the reaction is complete, transfer the obtained powder to a 10mL centrifuge tube, soak and wash with anhydrous DMF (6×5mL) until the supernatant is clear, soak and wash with acetone (6×5mL) until the supernatant is clear, dry at 40°C for 5.0h, and vacuum at 70°C After drying for 12.0 hours, 0.0662 g of the target product (Co&Cu&Zn)2DMOFs-1 was obtained.

Embodiment 2

[0030] Synthesis of metalloporphyrin trimetallic center (Zn&Cu&Co) 2D MOFs-2: 0.2911 g (1.00 mmol) of zinc nitrate hexahydrate; 5,10,15,20-tetrakis(4-carboxyphenyl)copper porphyrin (CuTCPP) 0.0426g (0.050mmol); 5,10,15,20-tetrakis(4-carboxyphenyl) cobalt porphyrin (CoTCPP) 0.0427g (0.050mmol) was placed in a 50ml agate ball mill jar, room temperature, 600rpm, ball milling reaction 8.0 h. Stop ball milling once every 1.0h, release the gas in the ball mill tank; after the reaction is completed, transfer the powder to a 10mL centrifuge tube, soak and wash in anhydrous DMF (6×5mL) until the supernatant is clear, then soak and wash in anhydrous acetone (6×5mL) 5 mL) until the upper layer was clear, dried at 40°C for 5.0h, and then vacuum-dried at 70°C for 12.0h to obtain 0.0584g of the target product (Zn&Cu&Co)2DMOFs-2.

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Abstract

The invention relates to a method for synthesizing naphthenic alcohol and naphthenic ketone through three-metal-center (CoCuZn) 2D MOFs / ultraviolet light catalytic oxidation of cycloalkane, and belongs to the field of industrial catalysis and fine organic synthesis. According to the application method, the metalloporphyrin three-metal-center (CoCuZn) 2D MOFs are dispersed in cycloalkane, the mass of the metalloporphyrin three-metal-center (CoCuZn) 2D MOFs accounts for 0.01%-20% of the amount of substance of the cycloalkane, g / mol, and the reaction system is sealed. An oxidizing agent is introduced, an ultraviolet lamp is used as a light source, and het stirring reaction is performed for 2.0-24.0 h; and post-treatment is performed on the reaction liquid to obtain the products naphthenic alcohol and naphthenic ketone. The method has the advantages of low reaction temperature, mild reaction conditions, high reaction efficiency, high selectivity of naphthenic alcohol and naphthenic ketone, few byproducts and small environmental influence. The invention provides an efficient, feasible and safe method for synthesizing naphthenic alcohol and naphthenic ketone through selective catalytic oxidation of naphthenic hydrocarbon.

Description

technical field [0001] The invention relates to a method for synthesizing cycloalkanol and cycloalkanone by trimetallic center (Co&Cu&Zn) 2D MOFs / ultraviolet photocatalytic oxidation of cycloalkane, which belongs to the field of industrial catalysis and fine organic synthesis. Background technique [0002] Catalytic oxidation of naphthenes is a very important conversion process in the chemical industry. The oxidation products cycloalkanol and cycloalkanone are not only important organic solvents, but also important fine chemical intermediates, widely used in pesticides, medicines, dyes, surface Synthesis of fine chemical products such as active agents and resins, especially the production of polyamide fibers nylon-6 and nylon-66. At present, the industrial catalytic oxidation of naphthenes is mainly based on homogeneous Co 2+ or Mn 2+ As a catalyst, oxygen (O 2 ) is an oxidizing agent, in The main problem is that the reaction temperature is high, the reaction conditions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/50C07C35/08C07C45/33C07C49/403C07C407/00C07C409/14C07C27/12B01J31/22
CPCB01J31/1691B01J31/183B01J31/2239C07C407/00C07C29/50C07C45/33B01J2531/16B01J2531/26B01J2531/845B01J2231/70B01J2531/025C07C2601/14B01J35/39C07C409/14C07C35/08C07C49/403
Inventor 沈海民黄浩
Owner ZHEJIANG UNIV OF TECH
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