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Catalyst and method for catalyzing and synthetizing carbon dioxide and epoxy compounds into cyclic carbonate

A technology of epoxy compounds and cyclic carbonates, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. Toxic, harsh reaction conditions and other problems, to achieve the effect of low cost, easy separation, high reactivity

Inactive Publication Date: 2009-11-25
任旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently reported catalysts for the synthesis of cyclic carbonates mainly include quaternary ammonium salts, imidazolium salts, organic bases, tetradentate Schiff base complexes, metal oxides, transition metal complexes, metal halides, crown ethers, molecular sieves, etc. However, in these catalyst systems and the reaction of using these catalysts to synthesize cyclic carbonates with carbon dioxide and epoxy compounds, there are more or less low catalytic activity, low stability, harsh reaction conditions, and strong toxicity of organic solvents used. , high catalyst cost or difficult separation of product and catalyst

Method used

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  • Catalyst and method for catalyzing and synthetizing carbon dioxide and epoxy compounds into cyclic carbonate
  • Catalyst and method for catalyzing and synthetizing carbon dioxide and epoxy compounds into cyclic carbonate
  • Catalyst and method for catalyzing and synthetizing carbon dioxide and epoxy compounds into cyclic carbonate

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Experimental program
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Effect test

Embodiment 1

[0033] In the stainless steel autoclave that effective volume is 1000 milliliters, add 1.25mmol zirconium carbonate successively, 1-methyl-3-butylimidazolium bromide 25mmol, finally add 500ml propylene oxide, charge into carbon dioxide, under magnetic stirring, by control The temperature instrument controls the reaction temperature to 200°C, then boosts the pressure to 2MPa with carbon dioxide, reacts for 5 hours, cools to room temperature, unloads the kettle, and distills the liquid obtained from the reaction to remove unreacted propylene oxide, and then distills it under reduced pressure to obtain The corresponding cyclic carbonate has a product purity greater than 99.5%, and the best isolated yield is 98.1%.

Embodiment 2

[0035] The catalyst system is 1.25 mmol of zirconium orthosulfate and 1.25 mmol of 1-methyl-3-butyl imidazolium bromide to obtain propylene carbonate. The reaction pressure is 0.2 MPa, the reaction temperature is 100° C., and the reaction time is 6 hours. All the other conditions, process are with embodiment 1.

[0036] The yield was 97.7%.

Embodiment 3

[0038] The catalyst system used is 1.25 mmol of zirconium acetate and 12.5 mmol of 1-methyl-3-butyl imidazolium bromide to obtain propylene carbonate. The reaction pressure is 4 MPa, the reaction temperature is 150° C., and the reaction time is 4 hours. All the other conditions, process are with embodiment 1.

[0039] The yield was 94.8%.

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Abstract

The invention provides a catalyst for synthetizing carbon dioxide and epoxy compounds into cyclic carbonate. Zircon salt is selected as a first active component of the catalyst, and one of imidazolium ionic liquid, pyridine ionic liquid and quaternary ammonium salt is used as a second active component of the catalyst. The invention also provides a method for synthetizing carbon dioxide and epoxy compounds into cyclic carbonate by using the catalyst. The catalyst has the advantages of simple system, low cost, high reaction activity and favorable selectivity. The method for synthetizing carbon dioxide and epoxy compounds into cyclic carbonate has the advantages of moderate reaction conditon, simple process, convenient operation, no need of any organic solvent in reaction and easy separation of products and the catalyst.

Description

【Technical field】 [0001] The invention relates to a cyclic carbonate synthesis technology, in particular to a method for synthesizing a cyclic carbonate by using carbon dioxide and an epoxy compound and a catalyst used in the method. 【Background technique】 [0002] Carbon dioxide gas is one of the most important greenhouse gases in the atmosphere. In recent years, the emission of carbon dioxide has been increasing, which has caused enormous pressure on the environment. However, from the perspective of resources, carbon dioxide is a safe, non-toxic, and abundant carbon resource. The most typical catalytic process in the conversion reaction of carbon dioxide is the use of CO 2 Synthesize carbonyl-containing cyclic carbonates by cycloaddition reaction with epoxy compounds. If no organic solvent is used in the reaction and post-treatment process, the reaction will be a standard "atom economy" and "green chemistry" reaction, all the atoms in the reactant are 100% utilized withou...

Claims

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Application Information

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IPC IPC(8): B01J31/38C07D317/40
Inventor 任旭
Owner 任旭