IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Acetonitrile with Propane
Components:
   (1) Propane; C3H8; [74-98-6]  NIST Chemistry WebBook for detail
   (2) Acetonitrile; C2H3N; [75-05-8]  NIST Chemistry WebBook for detail
Original Measurements:
   Gruszkiewicz, M.S.; Ott, J.B.; Sipowska, J.T., Thermochim. Acta 245, 155 (1994).

 Variables:
   Temperature = 298 K to 336 K
   Pressure = 5.0 MPa to 10.0 Mpa

 Prepared By:
   Valerii P. Sazonov

 Experimental Remarks:
   The mutual solubilities of acetonitrile (1) and propane (2) in mole fractions over the specified temperature range were reported in the original publication in form of the equation:
T = Tc +k|[αx/(1 + x(α - 1)] - [αxc/(1 + xc(α - 1)]|1/β.
The data presented here were calculated from the published equation by the compiler.

 Experimental Data:   (Notes on the Nomenclature)
  
Table 1. Mutual solubility of acetonitrile (1) and propane (2) at high pressure
t/°CT/KPressure102 * Mass Fraction w1Mole Fraction x1Comment(s)
27.0300.25.0--Hydrocarbon-rich phase
28.9302.15.04.70.05Hydrocarbon-rich phase
40.2313.45.0--Hydrocarbon-rich phase
40.9314.15.09.40.10Hydrocarbon-rich phase
49.5322.75.0--Hydrocarbon-rich phase
49.7322.95.014.10.15Hydrocarbon-rich phase
55.6328.85.018.90.20Hydrocarbon-rich phase
55.7328.95.0--Hydrocarbon-rich phase
59.3332.55.023.70.25Hydrocarbon-rich phase
59.5332.75.0--Hydrocarbon-rich phase
61.4334.65.028.50.30Hydrocarbon-rich phase
61.5334.75.0--Hydrocarbon-rich phase
62.2335.45.033.40.35Hydrocarbon-rich phase
62.3335.55.0--Hydrocarbon-rich phase
62.4335.65.038.30.40Hydrocarbon-rich phase
21.0294.210.0--Hydrocarbon-rich phase
36.1309.310.0--Hydrocarbon-rich phase
36.2309.410.04.70.05Hydrocarbon-rich phase
45.3318.510.09.40.10Hydrocarbon-rich phase
46.3319.510.0--Hydrocarbon-rich phase
51.6324.810.014.10.15Hydrocarbon-rich phase
52.8326.010.0--Hydrocarbon-rich phase
55.6328.810.018.90.20Hydrocarbon-rich phase
57.6329.810.0--Hydrocarbon-rich phase
57.9331.110.023.70.25Hydrocarbon-rich phase
58.5331.710.0--Hydrocarbon-rich phase
59.0332.210.028.50.30Hydrocarbon-rich phase
59.2332.410.0--Hydrocarbon-rich phase
59.3332.510.033.40.35Hydrocarbon-rich phase
59.4332.610.038.30.40Hydrocarbon-rich phase
27.0300.25.078.80.80Acetonitrile-rich phase
28.9302.15.0--Acetonitrile-rich phase
40.2313.45.073.60.75Acetonitrile-rich phase
40.9314.15.0--Acetonitrile-rich phase
49.5322.75.068.50.70Acetonitrile-rich phase
49.7322.95.0--Acetonitrile-rich phase
55.6328.85.0--Acetonitrile-rich phase
55.7328.95.063.40.65Acetonitrile-rich phase
59.3332.55.0--Acetonitrile-rich phase
59.5332.75.058.30.60Acetonitrile-rich phase
61.4334.65.0--Acetonitrile-rich phase
61.5334.75.053.20.55Acetonitrile-rich phase
62.2335.45.0--Acetonitrile-rich phase
62.3335.55.048.20.50Acetonitrile-rich phase
62.4335.65.043.20.45Acetonitrile-rich phase
21.0294.210.078.80.80Acetonitrile-rich phase
36.1309.310.073.60.75Acetonitrile-rich phase
36.2309.410.0--Acetonitrile-rich phase
45.3318.510.0--Acetonitrile-rich phase
46.3319.510.068.50.70Acetonitrile-rich phase
51.6324.810.0--Acetonitrile-rich phase
52.8326.010.063.40.65Acetonitrile-rich phase
55.6328.810.0--Acetonitrile-rich phase
57.6329.810.058.30.60Acetonitrile-rich phase
57.9331.110.0--Acetonitrile-rich phase
58.5331.710.053.20.55Acetonitrile-rich phase
59.0332.210.0--Acetonitrile-rich phase
59.2332.410.048.20.50Acetonitrile-rich phase
59.3332.510.0--Acetonitrile-rich phase
59.4332.610.043.20.45Acetonitrile-rich phase
 Method/Apparatus/Procedure:
   The synthetic method was used. The phase apparatus consists of a 50 mm long sapphire capillary with a 3.8 mm inside diameter and a 6.35 outside diameter, inserted in the exit line of the calorimeter. Samples of (1) and (2) are mixed in a flow calorimeter at a temperature above the UCST so that complete mixing occurs. The mixture (of known composition) exits the calorimeter through a stainless steel capillary line that is heated to keep the temperature above the UCST, and enters the thermostated bath surrounding the sapphire capillary. The mixture passes through coils of stainless steel capillary tubing inside the thermostat to equilibrate the mixture with the bath temperature, flows through the sapphire capillary, and exits the apparatus through the back pressure regulator. A Sodev Model CT-C thermostat circulates fluid through the bath. The temperature of this thermostat, which can be programmed to linearly increase or decrease with time, is lowered slowly until the fluid in the sapphire capillary becomes cloudy. The bath temperature where this occurs is read with a Hart Model 1506 resistance thermometer calibrated against a Rosemount thermometer (ITS-90), and is taken as the equilibrium temperature at the mole fraction of the mixture.

 Source and Purity of Materials:
   (1) Fisher Scientific HPLC; purity of 99.9 mass %; used without further purification.
   (2) Phillips; purity of 99.5 mass %; used without further purification.

 Estimated Errors:

   Temperature: ± 0.02 K
   Pressure: ± 0.1 MPa.