Mixture of Heptane + Cyclohexane

Datasets

1. Mole fraction (4)
2. P_c - Critical pressure, kPa (2)
3. P_vap - Vapor or sublimation pressure, kPa (4)
4. ρ_l - Mass density, kg/m3 (8)
5. γ - Surface tension liquid-gas, N/m (2)
6. T_boil - Boiling temperature at pressure P, K (4)
7. T_c - Critical temperature, K (2)
8. Vapor or sublimation pressure, kPa (2)

Mole fraction of Cyclohexane (2) [ref]

Operational condition: Pressure, kPa = 101.3 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Mole fraction of Cyclohexane (2) - Gas
0.0000	0.0000
0.0801	0.1237
0.1189	0.2017
0.2483	0.3341
0.3150	0.4418
0.3856	0.4968
0.5133	0.6416
0.6012	0.7221
0.6833	0.7924
0.7535	0.8217
0.8746	0.9321
1.0000	1.0000

Mole fraction of Cyclohexane (2) [ref]

Operational condition: Pressure, kPa = 101.3 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Mole fraction of Cyclohexane (2) - Gas
0.0000	0.0000
0.1192	0.1879
0.2507	0.3711
0.3498	0.4798
0.4180	0.5543
0.5150	0.6340
0.5993	0.7181
0.7535	0.8263
0.8469	0.9009
0.8804	0.9236
1.0000	1.0000

Mole fraction of Cyclohexane (2) [ref]

Operational condition: Pressure, kPa = 101.3 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Mole fraction of Cyclohexane (2) - Gas
0.0000	0.0000
0.0801	0.1237
0.1189	0.2017
0.2483	0.3341
0.3150	0.4418
0.3856	0.4968
0.5133	0.6416
0.6012	0.7221
0.6833	0.7924
0.7535	0.8217
0.8746	0.9321
1.0000	1.0000

Mole fraction of Cyclohexane (2) [ref]

Operational condition: Pressure, kPa = 101.3 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Mole fraction of Cyclohexane (2) - Gas
0.0000	0.0000
0.1192	0.1879
0.2507	0.3711
0.3498	0.4798
0.4180	0.5543
0.5150	0.6340
0.5993	0.7181
0.7535	0.8263
0.8469	0.9009
0.8804	0.9236
1.0000	1.0000

Critical pressure, kPa [ref]

Mole fraction of Cyclohexane (2) - Liquid	Critical pressure, kPa - Liquid
0.0000	2761.00
0.1000	2930.00
0.1996	3010.00
0.2965	3120.00
0.3997	3253.00
0.4981	3360.00
0.6008	3510.00
0.6987	3640.00
0.8001	3810.00
0.8998	3970.00
1.0000	4110.00

Critical pressure, kPa [ref]

Mole fraction of Cyclohexane (2) - Liquid	Critical pressure, kPa - Liquid
0.0000	2761.00
0.1000	2930.00
0.1996	3010.00
0.2965	3120.00
0.3997	3253.00
0.4981	3360.00
0.6008	3510.00
0.6987	3640.00
0.8001	3810.00
0.8998	3970.00
1.0000	4110.00

Vapor or sublimation pressure, kPa [ref]

Operational condition: Mole fraction = 0.7998 (Liquid)

Temperature, K - Liquid	Vapor or sublimation pressure, kPa - Liquid
298.15	11.90
313.15	22.40
333.15	47.50

Vapor or sublimation pressure, kPa [ref]

Operational condition: Temperature, K = 313.15 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Vapor or sublimation pressure, kPa - Liquid
0.2808	16.04
0.6836	20.99

Vapor or sublimation pressure, kPa [ref]

Operational condition: Mole fraction = 0.7998 (Liquid)

Temperature, K - Liquid	Vapor or sublimation pressure, kPa - Liquid
298.15	11.90
313.15	22.40
333.15	47.50

Vapor or sublimation pressure, kPa [ref]

Operational condition: Temperature, K = 313.15 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Vapor or sublimation pressure, kPa - Liquid
0.2808	16.04
0.6836	20.99

Mass density, kg/m3 [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 101.3 (Liquid)

Mole fraction of Heptane (1) - Liquid	Mass density, kg/m3 - Liquid
0.0000	773.88
0.0503	766.95
0.0991	760.53
0.2021	748.16
0.3118	735.69
0.3926	726.61
0.5039	717.21
0.6660	703.79
0.7062	700.61
0.8061	692.71
0.9061	685.62
0.9539	682.6
1.0000	679.57

Mass density, kg/m3 [ref]

Operational conditions:

• Pressure, kPa = 101 (Liquid)
• Temperature, K = 298.15 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Mass density, kg/m3 - Liquid
0.0516	683.17
0.0974	686.28
0.2503	697.41
0.2982	701.08
0.4017	709.54
0.4437	713.02
0.4881	717.01
0.5993	727.3
0.7000	737.45
0.7490	742.72
0.8718	757.12
0.8867	758.74
0.9479	766.75

Mass density, kg/m3 [ref]

Operational conditions:

• Pressure, kPa = 101 (Liquid)
• Temperature, K = 298.15 (Liquid)

Mass fraction of Heptane (1) - Liquid	Mass density, kg/m3 - Liquid
0.0000	773.88
0.0503	766.95
0.0991	760.53
0.2021	748.16
0.3118	735.69
0.3926	726.61
0.5039	717.21
0.6660	703.79
0.7062	700.61
0.8061	692.71
0.9061	685.62
0.9539	682.6
1.0000	679.57

Mass density, kg/m3 [ref]

Fixed		Measured
Temperature, K - Liquid	Mole fraction of Cyclohexane (2) - Liquid	Mass density, kg/m3 - Liquid
283.15	0.0000	692.2
283.15	0.1022	699.2
283.15	0.2022	706.5
283.15	0.3078	714.6
283.15	0.4010	722.3
283.15	0.4984	730.8
283.15	0.7003	750.8
283.15	0.8054	761.5
283.15	0.8980	774.2
283.15	1.0000	787.9
288.15	0.0000	688.0
288.15	0.1022	695.0
288.15	0.2022	702.2
288.15	0.3078	710.4
288.15	0.4010	717.9
288.15	0.4984	726.5
288.15	0.7003	746.4
288.15	0.8054	758.0
288.15	0.8980	769.7
288.15	1.0000	783.2
293.15	0.0000	683.8
293.15	0.1022	690.8
293.15	0.2022	698.0
293.15	0.3078	706.1
293.15	0.4010	713.6
293.15	0.4984	722.2
293.15	0.6002	728.8
293.15	0.7003	742.0
293.15	0.8054	753.5
293.15	0.8980	765.1
293.15	1.0000	778.6
298.15	0.0000	679.5
298.15	0.1022	686.5
298.15	0.2022	693.6
298.15	0.3078	701.7
298.15	0.4010	709.2
298.15	0.4984	717.8
298.15	0.6002	725.6
298.15	0.7003	737.5
298.15	0.8054	749.0
298.15	0.8980	760.5
298.15	1.0000	773.9
303.15	0.0000	675.2
303.15	0.1022	682.2
303.15	0.2022	689.3
303.15	0.3078	697.4
303.15	0.4010	704.8
303.15	0.4984	713.3
303.15	0.6002	722.0
303.15	0.7003	733.0
303.15	0.8054	744.4
303.15	0.8980	755.8
303.15	1.0000	769.2
308.15	0.0000	670.9
308.15	0.1022	677.8
308.15	0.2022	685.0
308.15	0.3078	693.0
308.15	0.4010	700.4
308.15	0.4984	708.9
308.15	0.6002	718.1
308.15	0.7003	728.4
308.15	0.8054	739.8
308.15	0.8980	751.2
308.15	1.0000	764.4
313.15	0.0000	666.5
313.15	0.1022	673.5
313.15	0.2022	680.6
313.15	0.3078	688.6
313.15	0.4010	696.0
313.15	0.4984	704.4
313.15	0.6002	713.8
313.15	0.7003	723.9
313.15	0.8054	735.2
313.15	0.8980	746.5
313.15	1.0000	759.6
318.15	0.0000	662.1
318.15	0.1022	669.0
318.15	0.2022	676.1
318.15	0.3078	684.1
318.15	0.4010	691.5
318.15	0.4984	699.9
318.15	0.6002	709.3
318.15	0.7003	719.3
318.15	0.8054	730.6
318.15	0.8980	741.8
318.15	1.0000	754.8
323.15	0.0000	657.7
323.15	0.1022	664.6
323.15	0.2022	671.7
323.15	0.3078	679.6
323.15	0.4010	686.9
323.15	0.4984	695.4
323.15	0.6002	704.7
323.15	0.7003	714.7
323.15	0.8054	725.9
323.15	0.8980	737.1
323.15	1.0000	750.0
328.15	0.0000	653.2
328.15	0.1022	660.1
328.15	0.2022	667.2
328.15	0.3078	675.1
328.15	0.4010	682.4
328.15	0.4984	691.0
328.15	0.6002	700.1
328.15	0.7003	710.0
328.15	0.8054	721.2
328.15	0.8980	732.3
328.15	1.0000	745.2
333.15	0.0000	648.7
333.15	0.1022	655.5
333.15	0.3078	670.5
333.15	0.4010	677.8
333.15	0.4984	686.2
333.15	0.6002	695.5
333.15	0.7003	705.3
333.15	0.8054	716.5
333.15	0.8980	727.5
333.15	1.0000	740.3

Mass density, kg/m3 [ref]

Operational conditions:

• Temperature, K = 298.15 (Liquid)
• Pressure, kPa = 101.3 (Liquid)

Mole fraction of Heptane (1) - Liquid	Mass density, kg/m3 - Liquid
0.0000	773.88
0.0503	766.95
0.0991	760.53
0.2021	748.16
0.3118	735.69
0.3926	726.61
0.5039	717.21
0.6660	703.79
0.7062	700.61
0.8061	692.71
0.9061	685.62
0.9539	682.6
1.0000	679.57

Mass density, kg/m3 [ref]

Operational conditions:

• Pressure, kPa = 101 (Liquid)
• Temperature, K = 298.15 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Mass density, kg/m3 - Liquid
0.0516	683.17
0.0974	686.28
0.2503	697.41
0.2982	701.08
0.4017	709.54
0.4437	713.02
0.4881	717.01
0.5993	727.3
0.7000	737.45
0.7490	742.72
0.8718	757.12
0.8867	758.74
0.9479	766.75

Mass density, kg/m3 [ref]

Operational conditions:

• Pressure, kPa = 101 (Liquid)
• Temperature, K = 298.15 (Liquid)

Mass fraction of Heptane (1) - Liquid	Mass density, kg/m3 - Liquid
0.0000	773.88
0.0503	766.95
0.0991	760.53
0.2021	748.16
0.3118	735.69
0.3926	726.61
0.5039	717.21
0.6660	703.79
0.7062	700.61
0.8061	692.71
0.9061	685.62
0.9539	682.6
1.0000	679.57

Mass density, kg/m3 [ref]

Fixed		Measured
Temperature, K - Liquid	Mole fraction of Cyclohexane (2) - Liquid	Mass density, kg/m3 - Liquid
283.15	0.0000	692.2
283.15	0.1022	699.2
283.15	0.2022	706.5
283.15	0.3078	714.6
283.15	0.4010	722.3
283.15	0.4984	730.8
283.15	0.7003	750.8
283.15	0.8054	761.5
283.15	0.8980	774.2
283.15	1.0000	787.9
288.15	0.0000	688.0
288.15	0.1022	695.0
288.15	0.2022	702.2
288.15	0.3078	710.4
288.15	0.4010	717.9
288.15	0.4984	726.5
288.15	0.7003	746.4
288.15	0.8054	758.0
288.15	0.8980	769.7
288.15	1.0000	783.2
293.15	0.0000	683.8
293.15	0.1022	690.8
293.15	0.2022	698.0
293.15	0.3078	706.1
293.15	0.4010	713.6
293.15	0.4984	722.2
293.15	0.6002	728.8
293.15	0.7003	742.0
293.15	0.8054	753.5
293.15	0.8980	765.1
293.15	1.0000	778.6
298.15	0.0000	679.5
298.15	0.1022	686.5
298.15	0.2022	693.6
298.15	0.3078	701.7
298.15	0.4010	709.2
298.15	0.4984	717.8
298.15	0.6002	725.6
298.15	0.7003	737.5
298.15	0.8054	749.0
298.15	0.8980	760.5
298.15	1.0000	773.9
303.15	0.0000	675.2
303.15	0.1022	682.2
303.15	0.2022	689.3
303.15	0.3078	697.4
303.15	0.4010	704.8
303.15	0.4984	713.3
303.15	0.6002	722.0
303.15	0.7003	733.0
303.15	0.8054	744.4
303.15	0.8980	755.8
303.15	1.0000	769.2
308.15	0.0000	670.9
308.15	0.1022	677.8
308.15	0.2022	685.0
308.15	0.3078	693.0
308.15	0.4010	700.4
308.15	0.4984	708.9
308.15	0.6002	718.1
308.15	0.7003	728.4
308.15	0.8054	739.8
308.15	0.8980	751.2
308.15	1.0000	764.4
313.15	0.0000	666.5
313.15	0.1022	673.5
313.15	0.2022	680.6
313.15	0.3078	688.6
313.15	0.4010	696.0
313.15	0.4984	704.4
313.15	0.6002	713.8
313.15	0.7003	723.9
313.15	0.8054	735.2
313.15	0.8980	746.5
313.15	1.0000	759.6
318.15	0.0000	662.1
318.15	0.1022	669.0
318.15	0.2022	676.1
318.15	0.3078	684.1
318.15	0.4010	691.5
318.15	0.4984	699.9
318.15	0.6002	709.3
318.15	0.7003	719.3
318.15	0.8054	730.6
318.15	0.8980	741.8
318.15	1.0000	754.8
323.15	0.0000	657.7
323.15	0.1022	664.6
323.15	0.2022	671.7
323.15	0.3078	679.6
323.15	0.4010	686.9
323.15	0.4984	695.4
323.15	0.6002	704.7
323.15	0.7003	714.7
323.15	0.8054	725.9
323.15	0.8980	737.1
323.15	1.0000	750.0
328.15	0.0000	653.2
328.15	0.1022	660.1
328.15	0.2022	667.2
328.15	0.3078	675.1
328.15	0.4010	682.4
328.15	0.4984	691.0
328.15	0.6002	700.1
328.15	0.7003	710.0
328.15	0.8054	721.2
328.15	0.8980	732.3
328.15	1.0000	745.2
333.15	0.0000	648.7
333.15	0.1022	655.5
333.15	0.3078	670.5
333.15	0.4010	677.8
333.15	0.4984	686.2
333.15	0.6002	695.5
333.15	0.7003	705.3
333.15	0.8054	716.5
333.15	0.8980	727.5
333.15	1.0000	740.3

Surface tension liquid-gas, N/m [ref]

Fixed		Measured
Temperature, K - Liquid	Mole fraction of Cyclohexane (2) - Liquid	Surface tension liquid-gas, N/m - Liquid
287.81	0.0000	0.0207
287.81	0.1022	0.0209
287.81	0.2022	0.0213
287.81	0.3078	0.0216
287.81	0.4010	0.0219
287.81	0.4984	0.0223
287.81	0.6002	0.0226
287.81	0.7003	0.0231
287.81	0.8054	0.0238
287.81	0.8980	0.0244
287.81	1.0000	0.0253
297.82	0.0000	0.0196
297.82	0.1022	0.0199
297.82	0.2022	0.0203
297.82	0.3078	0.0205
297.82	0.4010	0.0209
297.82	0.4984	0.0212
297.82	0.6002	0.0216
297.82	0.7003	0.0221
297.82	0.8054	0.0227
297.82	0.8980	0.0233
297.82	1.0000	0.0242
307.86	0.0000	0.0187
307.86	0.1022	0.0189
307.86	0.2022	0.0192
307.86	0.3078	0.0196
307.86	0.4010	0.0199
307.86	0.4984	0.0202
307.86	0.6002	0.0205
307.86	0.7003	0.0211
307.86	0.8054	0.0216
307.86	0.8980	0.0222
307.86	1.0000	0.0230
317.86	0.0000	0.0178
317.86	0.1022	0.0179
317.86	0.2022	0.0184
317.86	0.3078	0.0185
317.86	0.4010	0.0188
317.86	0.4984	0.0192
317.86	0.6002	0.0196
317.86	0.7003	0.0200
317.86	0.8054	0.0206
317.86	0.8980	0.0211
317.86	1.0000	0.0218
327.88	0.0000	0.0167
327.88	0.1022	0.0168
327.88	0.2022	0.0170
327.88	0.3078	0.0174
327.88	0.4010	0.0175
327.88	0.4984	0.0180
327.88	0.6002	0.0184
327.88	0.7003	0.0190
327.88	0.8054	0.0195
327.88	0.8980	0.0200
327.88	1.0000	0.0207

Surface tension liquid-gas, N/m [ref]

Fixed		Measured
Temperature, K - Liquid	Mole fraction of Cyclohexane (2) - Liquid	Surface tension liquid-gas, N/m - Liquid
287.81	0.0000	0.0207
287.81	0.1022	0.0209
287.81	0.2022	0.0213
287.81	0.3078	0.0216
287.81	0.4010	0.0219
287.81	0.4984	0.0223
287.81	0.6002	0.0226
287.81	0.7003	0.0231
287.81	0.8054	0.0238
287.81	0.8980	0.0244
287.81	1.0000	0.0253
297.82	0.0000	0.0196
297.82	0.1022	0.0199
297.82	0.2022	0.0203
297.82	0.3078	0.0205
297.82	0.4010	0.0209
297.82	0.4984	0.0212
297.82	0.6002	0.0216
297.82	0.7003	0.0221
297.82	0.8054	0.0227
297.82	0.8980	0.0233
297.82	1.0000	0.0242
307.86	0.0000	0.0187
307.86	0.1022	0.0189
307.86	0.2022	0.0192
307.86	0.3078	0.0196
307.86	0.4010	0.0199
307.86	0.4984	0.0202
307.86	0.6002	0.0205
307.86	0.7003	0.0211
307.86	0.8054	0.0216
307.86	0.8980	0.0222
307.86	1.0000	0.0230
317.86	0.0000	0.0178
317.86	0.1022	0.0179
317.86	0.2022	0.0184
317.86	0.3078	0.0185
317.86	0.4010	0.0188
317.86	0.4984	0.0192
317.86	0.6002	0.0196
317.86	0.7003	0.0200
317.86	0.8054	0.0206
317.86	0.8980	0.0211
317.86	1.0000	0.0218
327.88	0.0000	0.0167
327.88	0.1022	0.0168
327.88	0.2022	0.0170
327.88	0.3078	0.0174
327.88	0.4010	0.0175
327.88	0.4984	0.0180
327.88	0.6002	0.0184
327.88	0.7003	0.0190
327.88	0.8054	0.0195
327.88	0.8980	0.0200
327.88	1.0000	0.0207

Boiling temperature at pressure P, K [ref]

Operational condition: Pressure, kPa = 101.3 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Boiling temperature at pressure P, K - Liquid
0.0000	371.53
0.0801	369.87
0.1189	368.48
0.2483	366.42
0.3150	364.85
0.3856	363.64
0.5133	361.21
0.6012	360.02
0.6833	358.57
0.7535	357.60
0.8746	355.41
1.0000	353.94

Boiling temperature at pressure P, K [ref]

Operational condition: Pressure, kPa = 101.3 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Boiling temperature at pressure P, K - Liquid
0.0000	370.97
0.1192	368.67
0.2507	365.55
0.3498	363.57
0.4180	362.17
0.5150	360.95
0.5993	359.69
0.7535	357.05
0.8469	355.78
0.8804	355.19
1.0000	353.82

Boiling temperature at pressure P, K [ref]

Operational condition: Pressure, kPa = 101.3 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Boiling temperature at pressure P, K - Liquid
0.0000	371.53
0.0801	369.87
0.1189	368.48
0.2483	366.42
0.3150	364.85
0.3856	363.64
0.5133	361.21
0.6012	360.02
0.6833	358.57
0.7535	357.60
0.8746	355.41
1.0000	353.94

Boiling temperature at pressure P, K [ref]

Operational condition: Pressure, kPa = 101.3 (Liquid)

Mole fraction of Cyclohexane (2) - Liquid	Boiling temperature at pressure P, K - Liquid
0.0000	370.97
0.1192	368.67
0.2507	365.55
0.3498	363.57
0.4180	362.17
0.5150	360.95
0.5993	359.69
0.7535	357.05
0.8469	355.78
0.8804	355.19
1.0000	353.82

Critical temperature, K [ref]

Mole fraction of Cyclohexane (2) - Liquid	Critical temperature, K - Liquid
0.0000	540.00
0.1000	541.50
0.1996	542.80
0.2965	543.40
0.3997	544.80
0.4981	546.10
0.6008	547.40
0.6987	549.40
0.8001	550.70
0.8998	552.90
1.0000	554.10

Critical temperature, K [ref]

Mole fraction of Cyclohexane (2) - Liquid	Critical temperature, K - Liquid
0.0000	540.00
0.1000	541.50
0.1996	542.80
0.2965	543.40
0.3997	544.80
0.4981	546.10
0.6008	547.40
0.6987	549.40
0.8001	550.70
0.8998	552.90
1.0000	554.10

Vapor or sublimation pressure, kPa [ref]

Operational condition: Temperature, K = 303.2 (Gas)

Mole fraction of Heptane (1) - Liquid	Vapor or sublimation pressure, kPa - Gas
0.0000	16.10
0.0980	15.40
0.1030	15.30
0.2150	14.50
0.2210	14.50
0.3230	13.60
0.3310	13.60
0.4250	12.80
0.4400	12.70
0.5270	12.00
0.5410	11.90
0.6310	11.10
0.6630	10.70
0.7410	10.10
0.7750	9.80
0.8260	9.30
0.8670	8.90
0.9100	8.60
0.9460	8.30
1.0000	7.70

Vapor or sublimation pressure, kPa [ref]

Operational condition: Temperature, K = 303.2 (Gas)

Mole fraction of Heptane (1) - Liquid	Vapor or sublimation pressure, kPa - Gas
0.0000	16.10
0.0980	15.40
0.1030	15.30
0.2150	14.50
0.2210	14.50
0.3230	13.60
0.3310	13.60
0.4250	12.80
0.4400	12.70
0.5270	12.00
0.5410	11.90
0.6310	11.10
0.6630	10.70
0.7410	10.10
0.7750	9.80
0.8260	9.30
0.8670	8.90
0.9100	8.60
0.9460	8.30
1.0000	7.70

Sources

• Capacity of ionic liquids [EMim][NTf2] and [EMpy][NTf2] for extraction of toluene from mixtures with alkanes: Comparative study of the effect of the cation
• Quaternary isothermal vapor-liquid equilibrium of the model biofuel 2-butanone + n-heptane + tetrahydrofuran + cyclohexane using Raman spectroscopic characterization
• Excess molar volumes of the ternary system {methylcyclohexane (1) + cyclohexane (2) + n-alkanes (3)} at T = 298.15 K
• (Liquid + liquid) equilibria for the ternary mixtures (alkane + toluene + ionic liquid) at T = 298.15 K: Influence of the anion on the phase equilibria
• Measurement of critical temperatures and critical pressures for binary mixtures of methyl tert-butyl ether (MTBE) + alcohol and MTBE + alkane
• Isobaric vapor-liquid equilibrium of three binary systems containing dimethyl succinate, dimethyl glutarate and dimethyl adipate at 2, 5.2 and 8.3 kPa
• Bubble Pressure Measurement and Prediction for n-Hexadecane and n-Eicosane + Cyclohexane, Methylcyclohexane, and Ethylcyclohexane Binary Mixtures from 303.15 to 393.15 K
• A New Test System for Distillation Efficiency Experiments at Elevated Liquid Viscosities: Vapor-Liquid Equilibrium and Liquid Viscosity Data for Cyclopentanol + Cyclohexanol
• Surface Tension and Interfacial Tension of Binary Organic Liquid Mixtures
• Phase Equilibrium Properties of Binary and Ternary Mixtures Containing Dibutyl Ether, Cyclohexane, and Heptane or 1-Hexene at T ) 313.15 K