Extraction of S- and N-Compounds from the Mixture of Hydrocarbons by Ionic Liquids as Selective Solvents

Table 4

Extraction efficiency for multistage extraction of S- and N-compounds from the model solutions.

Ionic liquid	Component	Extraction efficiency%
		FCC model solution				Diesel model solution
		stage				stage
		1	2	3	4	1	2	3	4
[C2mim][EtSO4]	Tiophene	12.01	24.11	32.98	39.85	16.60	25.66	39.94	49.36
	Pyridine	27.52	49.13	70.58	70.58	30.22	45.42	66.16	86.22
	DBT	—	—	—	—	14.70	25.14	33.32	42.40
[C5mim][Tf2N]	Tiophene	15.37	26.36	35.93	45.92	16.41	32.44	45.82	53.58
	Pyridine	45.62	58.63	70.18	78.59	35.12	49.58	76.93	87.80
	DBT	—	—	—	—	22.78	41.98	54.42	66.29
[C6mmPy][Tf2N]	Tiophene	12.05	24.71	40.06	50.53	24.21	29.53	43.08	65.59
	Pyridine	39.21	45.82	65.76	75.69	47.43	58.74	71.59	98.87
	DBT	—	—	—	—	35.67	59.10	71.38	92.61
[bzmim][Tf2N]	Tiophene	12.44	25.06	34.34	39.45	17.28	30.98	39.89	51.05
	Pyridine	36.19	54.72	68.37	70.17	42.82	62.59	72.59	80.57
	DBT	—	—	—	—	17.71	36.44	45.83	54.31
[C7mmim][Tf2N]	Tiophene	12.73	26.15	35.29	40.45	19.27	32.19	37.06	45.87
	Pyridine	32.16	53.27	67.60	70.64	41.08	65.57	78.67	81.04
	DBT	—	—	—	—	31.89	53.74	59.08	70.37
[C10mmim][Tf2N]	Tiophene	17.16	29.67	40.95	50.49	17.16	31.82	45.93	57.48
	Pyridine	32.48	54.36	66.98	77.11	38.85	60.43	74.08	81.51
	DBT	—	—	—	—	36.27	56.36	69.72	77.19