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Ionic microporous polymer catalyst as well as preparation method and application thereof
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A technology of microporous polymers and catalysts, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, separation methods, etc., can solve the problem of many catalyst preparation steps and catalytic aids that cannot be recycled and reused and other problems, to achieve the effect of high dispersion density
Active Publication Date: 2019-02-15
SUZHOU UNIV
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Problems solved by technology
The existing catalysts that can catalyze the reaction under milder conditions have many preparation steps, the monomer needs to be synthesized, and there is a problem that the catalytic promoter cannot be recycled and reused.
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Embodiment 1
[0045] Embodiment 1: the preparation of catalyst cat-Al-Zn
[0046] Preparation of tetraimidazole-based aluminum monomer: imidazole (4.2mmol, 0.29g), aluminum trichloride (1mmol, 133.4mg) were dissolved in 30ml of methanol, stirred at 30°C for 12 hours, methanol was removed, suction filtered, rinsed with THF, and dried , to obtain the monomer 1-Al.
[0047] Preparation of tetraimidazole-based zinc monomer: imidazole (4.2mmol, 0.29g), zincchloride (1mmol, 136.3mg) were dissolved in methanol, stirred at 30°C for 12 hours, methanol was removed, suction filtered, rinsed with THF, dried to obtain Monomer 1-Zn.
[0048] 1-Al (1mmol, 0.41g), 1-Zn (1mmol, 0.41g) was dissolved in 25ml of NMP, and 1,4-p-dichlorobenzyl (5mmol, 0.9g) or 1,4-p-dibromobenzyl was added, Stir at 80°C for 30h, stop the reaction, cool to room temperature, filter with suction, and wash with CH 2 Cl 2 and CH 3 OH washing solid, Soxhlet extraction for 30h (extraction solution is CH 2 Cl 2 with CH 3 OH vol...
Embodiment 2
[0051] Preparation of tetraimidazole-based cobalt monomer: imidazole (4.2mmol, 0.29g), cobalt acetate (1mmol, 177.0mg) were dissolved in methanol 30ml, stirred at 30°C for 12 hours, methanol was removed, suction filtered, rinsed with THF, dried to obtain Monomer 1-Co.
[0052] Preparation of tetraimidazole-based zinc monomer: imidazole (4.2mmol, 0.29g), zinc chloride (1mmol, 136.3mg) were dissolved in methanol, stirred at 30°C for 12 hours, methanol was removed, suction filtered, rinsed with THF, dried to obtain Monomer 1-Zn.
[0053]1-Co (1mmol, 0.45g), 1-Zn (1mmol, 0.41g) were dissolved in 25ml of NMP, and 1,4-p-dichlorobenzyl (5mmol, 0.9g) or 1,4-p-dibromobenzyl was added, Stir at 80°C for 30h, stop the reaction, cool to room temperature, filter with suction, and wash with CH 2 Cl 2 and CH 3 OH washing solid, Soxhlet extraction for 30h (extraction solution is CH 2 Cl 2 with CH 3 OH volume ratio of 1.5:1 mixture), and finally vacuum-dried at 70°C for 12 hours to obtai...
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Abstract
The invention discloses an ionic microporous polymer catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. According to the preparation method, inexpensive and easily obtained monomers are used for preparing a bifunctional catalyst through a simple organic synthesis reaction, a bimetallic catalytic center and a nucleophilic reagent are simultaneously introduced into a porous polymer, and the nucleophilic reagent has high dispersion density, and the low-cost catalyst catalyzes conversion of carbon dioxide into cyclocarbonate under the conditions of 0.1-0.7 MPa and 25-90 DEG C. According to a simple synthesis method and through low-cost raw materials, a catalytic effect similar to that of a high-cost catalyst is achieved, and the catalyst can be reused.
Description
technical field [0001] The invention relates to an ionic microporous polymer catalyst and its preparation method and application, belonging to the technical field of catalyst preparation. Background technique [0002] The emission of carbon dioxide is increasing year by year. Designing and preparing materials with the characteristics of capturing and storing carbon dioxide and paying attention to CO 2 The chemical utilization of is imminent. As a cheap and easy-to-obtain carbon-1 building block, carbon dioxide has attracted much attention as a raw material for the preparation of high value-added chemical products. Catalysts play an important role in the carbon dioxide conversion process. The catalytic center and catalytic promoter are introduced into the porous polymer at the same time, and the bifunctional polymer is used as a heterogeneous catalyst to catalyze the reaction of carbon dioxide and alkylene oxide to convert it into cyclocarbonate. For the preparation of this...
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