Immobilized ionic-liquid catalyst and application thereof to synthesizing ester lubricating oil
The technology of ionic liquid and catalyst is applied in the field of immobilized ionic liquid catalyst and in the field of synthetic ester lubricating oil, which can solve the problems of high energy consumption, high cost, large amount of consumption, etc., and achieves high catalyst activity and simple synthesis method. , the effect of speeding up the process of industrial application
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[0025] Example 1
[0026] 1-Butanesulfonic acid-3-methylimidazole hydrogen sulfate ([BHSO 3 MIm]HSO 4 )Synthesis
[0027] Step 1. Mix 1 mol of methylimidazole, equimolar 4-butane sultone and 100 mL of acetone in a three-necked flask, 25 o Stir mechanically for 3 days at C. Increase the reaction temperature to 50 when a white solid precipitates o C. Continue the reaction for 3 days, and a large amount of white solid precipitates out. The white solid obtained by filtration is BMImSO 3 , BMImSO can be crystallized again after distillation 3 , The product was washed and purified with acetone.
[0028] Step 2. Under ice-bath stirring, slowly add 1 mol of the above product dropwise to 1.02 mol of concentrated sulfuric acid (98%) to form a liquid product. The water in the product is evaporated to dryness to obtain a colorless viscous liquid [BHSO 3 MIm] + [HSO 4 ] - .
Example Embodiment
[0029] Example 2
[0030] Synthesis of 1-butanesulfonic acid-3-methylimidazole dihydrogen phosphate
[0031] Under the condition of ice bath stirring, slowly add 1 mol of the product in step 1 of Example 1 dropwise to 1.18 mol of concentrated phosphoric acid (85%) to form a liquid product, and evaporate the water in the product to obtain a colorless viscous liquid [BHSO 3 MIm] + [H 2 PO 4 ] - .
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[0032] Example 3
[0033] Synthesis of 1-Butanesulfonic Acid-3-Methylimidazole Trifluoroacetate
[0034] Under ice-bath stirring conditions, slowly add 1 mol of the product in step 1 of Example 1 to an equimolar amount of trifluoroacetic acid to form a solid product. The water in the product is evaporated to dryness to obtain a white solid [BHSO 3 MIm] + [CF 3 CO 2 ] - .
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