Catalyst for synthesizing cyclic carbonate, preparation method of catalyst and preparation method of cyclic carbonate
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A cyclic carbonate and catalyst technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of high cost
Active Publication Date: 2019-05-21
INST OF PROCESS ENG CHINESE ACAD OF SCI
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The catalyst added by this method is a nano-t
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Embodiment 1
[0046] In this embodiment, a catalyst is prepared by the following method, and the structure is as follows:
[0047]
[0048] In a 250mL three-necked flask equipped with a reflux device, dissolve 0.008mol of 1H-imidazole-4-carboxylic acid and 0.5mL of hydrochloric acid (36%-38%) in 100g of water together, and raise the temperature to 70℃ until the reactants are completely dissolved , Then add 0.004mol 1,2-dichloroethane dropwise, continue to stir, keep refluxing for 24h, until there is no more brown-yellow solid. After cooling, it was filtered under reduced pressure, washed with ethyl acetate, filtered and dried in vacuum for 24 hours to obtain a catalyst.
Embodiment 2
[0050] In this embodiment, a catalyst is prepared by the following method, and the structure is as follows:
[0051]
[0052] The preparation method refers to Example 1, only replacing 1,2-dichloroethane with 1,2-dibromoethane.
[0053] Carbon NMR spectrum: 13 C NMR(151MHz, D 2 O) δ136.30–136.16(m), 124.13(s), 121.85(s), 48.51–48.38(m), 35.73(s).
Embodiment 3
[0055] In this embodiment, a catalyst is prepared by the following method, and the structure is as follows:
[0056]
[0057] The preparation method refers to Example 1, only replacing 1,2-dichloroethane with 1,2-diiodoethane.
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Abstract
The invention provides a catalyst for synthesizing cyclic carbonate, a preparation method of the catalyst and a preparation method of the cyclic carbonate. The catalyst is a combination of any one ortwo or more of compounds shown in the formula I or II or III. The catalyst for synthesizing the cyclic carbonate is a multi-active-site catalyst, an active group R group and halogen atoms in the catalyst can generate a cooperative catalysis function, so that under the condition that other additives and catalysts do not need to be added, under the mild condition, a cycloaddition reaction can be efficiently and high-selectively catalyzed for synthesizing the cyclic carbonate, and the catalyst has high industrial potential.
Description
Technical field [0001] The invention belongs to the field of catalysts, and relates to a catalyst for synthesizing cyclic carbonate, a preparation method and a preparation method of cyclic carbonate, in particular to a multi-active site ionic liquid catalyst for synthesizing cyclic carbonate, Preparation method and preparation method of cyclic carbonate. Background technique [0002] In recent years, with the burning of fossil fuels, the impact of carbon dioxide on global warming has become more and more serious. 2 The conversion of C1 resources to high value-added chemicals is an effective means to alleviate energy crisis and environmental problems, and it is also the frontier of international research in recent years. More representative is CO 2 And epoxy compound to synthesize cyclic carbonate carbonylation reaction. Cyclic carbonate is an important chemical product with a wide range of applications. It has the characteristics of low toxicity, biodegradability, and high boili...
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