Process for continuously generating methyl acetate by reactive distillation taking ionic liquid as catalyst
A technology of ionic liquid and methyl acetate, which is applied in the fields of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, chemical industry, etc., can solve the trouble of catalyst recovery and recycling, and the complexity of ionic liquid synthesis method , Difficulty in large-scale production and other issues, to achieve the effect of improving raw material utilization, reducing heat energy consumption, and low cost
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[0031] Example 1: Synthesis of triethyl tertiary amine hydrogen sulfate ionic liquid
[0032] Mix 98g (1mol) of concentrated sulfuric acid into an aqueous solution with a mass fraction of 40% to 50%, and then put 101g (1mol) of triethylamine into a 1L reactor, and slowly add dilute sulfuric acid solution dropwise while stirring. The reaction was refluxed for 12 hours. After the reaction is completed, the water is removed by vacuum drying to obtain triethyl tertiary amine hydrogen sulfate ionic liquid with a yield of 99%.
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[0033] Example 2: Synthesis of N-Methylimidazole Hydrogen Sulfate
[0034]Put 82g (1mol) of N-methylimidazole into a 1L reactor, add 100ml of acetonitrile, add 98g (1mol) of concentrated sulfuric acid while stirring, and reflux for 10 hours at room temperature. After the reaction is completed, the solvent is evaporated, and N-methylimidazole hydrogen sulfate ionic liquid is obtained after vacuum drying, with a yield of about 98.5%.
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[0035] Example 3: Synthesis of pyridine bisulfate
[0036] Load 79g (1mol) of pyridine into a 1L reactor, add 100ml of acetonitrile, add 98g (1mol) of concentrated sulfuric acid under stirring, and reflux for 8 hours at room temperature. After the reaction is completed, the solvent is evaporated, and the pyridine hydrogen sulfate ionic liquid is obtained after vacuum drying, with a yield of about 99%.
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