Method for preparing alkylation gasoline by polyether type acid ionic liquid coupling trifluoromethanesulfonic acid catalysis
A technology of acidic ionic liquid and trifluoromethanesulfonic acid, which is applied in the field of catalytic preparation of alkylated gasoline, can solve the problems of unsatisfactory catalytic alkylation reaction effect, irreversible loss of catalyst, weak acidity, etc., and achieve high TMP selectivity, The effect of short reaction time and fast reaction rate
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Embodiment 1
[0021] Example 1: 0.01 mol of di-n-hexylamine and 10 mL of absolute ethanol were added into an autoclave, and placed in a refrigerator for 2 hours. Weigh a certain volume of ethylene oxide and add it to the autoclave, seal the autoclave, and use 5MPa of N 2 Replace the air in the kettle 3 to 5 times. Stir the reaction at room temperature for 2 hours, then heat the reaction at 60°C for 4 hours, lower the temperature, release the pressure, and open the kettle. The reaction mixture was moved into a three-necked flask, and the absolute ethanol was removed by distillation under reduced pressure to a constant weight to obtain intermediate I. The average degree of polymerization (n) of intermediate I could be calculated according to the product weight gain method. Add 0.01 mol of 1,3-propane sultone into the three-necked flask, add 10 mL of ethyl acetate to dissolve it, and then add the same amount of intermediate I dropwise. After the dropwise addition was completed, the reaction ...
Embodiment 2
[0024]Embodiment 2: In the autoclave that is equipped with mechanical stirrer, add 2mL CF 3 SO 3 H and 10 mL of ionic liquid (n=50), seal the kettle, and replace the air in the kettle with 5 MPa high-purity nitrogen for 4 times. Then pump 30mL of a mixed liquid of isobutane and isobutene with a molar ratio of 10:1, heat in a water bath and turn on mechanical stirring, and react for 30min at a stirring rate of 1000r / min and 60°C. Cool the autoclave with an ice-water bath, open the autoclave, and collect the upper alkylated oil phase. Quantitative analysis was performed by gas chromatography. Alkylate C8 product selectivity was 65%, of which trimethylpentane (TMP) accounted for 99.1%.
Embodiment 3
[0025] Embodiment 3: In the autoclave that is equipped with mechanical stirrer, add 1.8mL CF 3 SO 3 H and 10 mL of ionic liquid (n=75), seal the kettle, and replace the air in the kettle with 5 MPa high-purity nitrogen for 4 times. Then pump 30mL of a mixed liquid of isobutane and isobutene with a molar ratio of 10:1, heat in a water bath and turn on mechanical stirring, and react for 30min at a stirring rate of 1000r / min and 60°C. Cool the autoclave with an ice-water bath, open the autoclave, and collect the upper alkylated oil phase. Quantitative analysis was performed by gas chromatography. Alkylate C8 product selectivity was 68%, of which trimethylpentane (TMP) accounted for 99.0%.
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