IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethene with Heptane

Components:
   (1) Ethene; C2H4; [74-85-1]  NIST Chemistry WebBook for detail
   (2) Heptane; C7H16; [142-82-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Kay, W.B., Ind. Eng. Chem. 1948, 40, 1459-1464.

Variables:
   Temperature = 211.5 K to 522.0 K
   Pressure = 0.677 to 19.15

Prepared By:
   W. Hayduk

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)


T/K	Temp Note	Pressure [psia]	Pressure [MPa]	Pressure Note	Henry's law constant, K [y₁/x₁]	Henry Constant Note	Mass Fraction (w₁)	w1 Note	Mole Fraction (x₁)	x₁ Note	Mole Fraction (x₂)	x₂ Note
357.04	1	100	0.689	1	12.94	1	0.0208	in Liquid, mass	0.0704	in liquid	12.94	1 Equilibrium Constant for Ethene y1/x1
399.93	1	150	1.034	1	11.38	1	0.0208	in Liquid, mass	0.0704	in liquid	11.38	1 Equilibrium Constant for Ethene y1/x1
431.54	1	200	1.379	1	9.87	1	0.0208	in Liquid, mass	0.0704	in liquid	9.87	1 Equilibrium Constant for Ethene y1/x1
455.76	1	250	1.724	1	8.66	1	0.0208	in Liquid, mass	0.0704	in liquid	8.66	1 Equilibrium Constant for Ethene y1/x1
475.37	1	300	2.068	1	7.70	1	0.0208	in Liquid, mass	0.0704	in liquid	7.70	1 Equilibrium Constant for Ethene y1/x1
492.43	1	350	2.413	1	6.89	1	0.0208	in Liquid, mass	0.0704	in liquid	6.89	1 Equilibrium Constant for Ethene y1/x1
507.93	1	400	2.758	1	6.15	1	0.0208	in Liquid, mass	0.0704	in liquid	6.15	1 Equilibrium Constant for Ethene y1/x1
522.04	1	450	3.103	1	5.50	1	0.0208	in Liquid, mass	0.0704	in liquid	5.50	1 Equilibrium Constant for Ethene y1/x1
275.37	1	100	0.689	1	5.41	1	0.0596	in Liquid, mass	0.1846	in liquid	5.41	1 Equilibrium Constant for Ethene y1/x1
303.59	1	150	1.034	1	5.38	1	0.0596	in Liquid, mass	0.1846	in liquid	5.38	1 Equilibrium Constant for Ethene y1/x1
328.43	1	200	1.379	1	5.34	1	0.0596	in Liquid, mass	0.1846	in liquid	5.34	1 Equilibrium Constant for Ethene y1/x1
351.71	1	250	1.724	1	5.28	1	0.0596	in Liquid, mass	0.1846	in liquid	5.28	1 Equilibrium Constant for Ethene y1/x1
374.37	1	300	2.068	1	5.18	1	0.0596	in Liquid, mass	0.1846	in liquid	5.18	1 Equilibrium Constant for Ethene y1/x1
395.93	1	350	2.413	1	5.05	1	0.0596	in Liquid, mass	0.1846	in liquid	5.05	1 Equilibrium Constant for Ethene y1/x1
416.26	1	400	2.758	1	4.90	1	0.0596	in Liquid, mass	0.1846	in liquid	4.90	1 Equilibrium Constant for Ethene y1/x1
435.98	1	450	3.103	1	4.71	1	0.0596	in Liquid, mass	0.1846	in liquid	4.71	1 Equilibrium Constant for Ethene y1/x1
454.87	1	500	3.447	1	4.50	1	0.0596	in Liquid, mass	0.1846	in liquid	4.50	1 Equilibrium Constant for Ethene y1/x1
473.15	1	550	3.792	1	4.27	1	0.0596	in Liquid, mass	0.1846	in liquid	4.27	1 Equilibrium Constant for Ethene y1/x1
491.43	1	600	4.137	1	4.01	1	0.0596	in Liquid, mass	0.1846	in liquid	4.01	1 Equilibrium Constant for Ethene y1/x1
515.37	1	650	4.482	1	3.58	1	0.0596	in Liquid, mass	0.1846	in liquid	3.58	1 Equilibrium Constant for Ethene y1/x1
252.59	1	100	0.689	1	3.50	1	0.1007	in Liquid, mass	0.2857	in liquid	3.50	1 Equilibrium Constant for Ethene y1/x1
273.15	1	150	1.034	1	3.50	1	0.1007	in Liquid, mass	0.2857	in liquid	3.50	1 Equilibrium Constant for Ethene y1/x1
290.93	1	200	1.379	1	3.49	1	0.1007	in Liquid, mass	0.2857	in liquid	3.49	1 Equilibrium Constant for Ethene y1/x1
307.54	1	250	1.724	1	3.49	1	0.1007	in Liquid, mass	0.2857	in liquid	4.59	1 Equilibrium Constant for Ethene y1/x1
323.26	1	300	2.068	1	3.48	1	0.1007	in Liquid, mass	0.2857	in liquid	3.48	1 Equilibrium Constant for Ethene y1/x1
338.59	1	350	2.413	1	3.46	1	0.1007	in Liquid, mass	0.2857	in liquid	3.46	1 Equilibrium Constant for Ethene y1/x1
353.54	1	400	2.758	1	3.45	1	0.1007	in Liquid, mass	0.2857	in liquid	3.45	1 Equilibrium Constant for Ethene y1/x1
368.26	1	450	3.103	1	3.42	1	0.1007	in Liquid, mass	0.2857	in liquid	3.42	1 Equilibrium Constant for Ethene y1/x1
383.21	1	500	3.447	1	3.40	1	0.1007	in Liquid, mass	0.2857	in liquid	3.40	1 Equilibrium Constant for Ethene y1/x1
398.26	1	550	3.792	1	3.36	1	0.1007	in Liquid, mass	0.2857	in liquid	3.36	1 Equilibrium Constant for Ethene y1/x1
413.48	1	600	4.137	1	3.32	1	0.1007	in Liquid, mass	0.2857	in liquid	3.32	1 Equilibrium Constant for Ethene y1/x1
428.98	1	650	4.482	1	3.26	1	0.1007	in Liquid, mass	0.2857	in liquid	3.26	1 Equilibrium Constant for Ethene y1/x1
444.82	1	700	4.826	1	3.19	1	0.1007	in Liquid, mass	0.2857	in liquid	3.19	1 Equilibrium Constant for Ethene y1/x1
462.04	1	750	5.171	1	3.11	1	0.1007	in Liquid, mass	0.2857	in liquid	3.11	1 Equilibrium Constant for Ethene y1/x1
483.87	1	800	5.516	1	2.97	1	0.1007	in Liquid, mass	0.2857	in liquid	2.97	1 Equilibrium Constant for Ethene y1/x1
300.09	1	400	2.758	1	2.114	1	0.2005	in Liquid, mass	0.4725	in liquid	2.114	1 Equilibrium Constant for Ethene y1/x1
308.82	1	450	3.103	1	2.113	1	0.2005	in Liquid, mass	0.4725	in liquid	2.113	1 Equilibrium Constant for Ethene y1/x1
317.26	1	500	3.447	1	2.112	1	0.2005	in Liquid, mass	0.4725	in liquid	2.112	1 Equilibrium Constant for Ethene y1/x1
325.48	1	550	3.792	1	2.110	1	0.2005	in Liquid, mass	0.4725	in liquid	2.110	1 Equilibrium Constant for Ethene y1/x1
333.71	1	600	4.137	1	2.109	1	0.2005	in Liquid, mass	0.4725	in liquid	2.109	1 Equilibrium Constant for Ethene y1/x1
341.93	1	650	4.482	1	2.107	1	0.2005	in Liquid, mass	0.4725	in liquid	2.107	1 Equilibrium Constant for Ethene y1/x1
350.09	1	700	4.826	1	2.104	1	0.2005	in Liquid, mass	0.4725	in liquid	2.104	1 Equilibrium Constant for Ethene y1/x1
358.71	1	750	5.171	1	2.101	1	0.2005	in Liquid, mass	0.4725	in liquid	2.101	1 Equilibrium Constant for Ethene y1/x1
367.21	1	800	5.516	1	2.098	1	0.2005	in Liquid, mass	0.4725	in liquid	2.098	1 Equilibrium Constant for Ethene y1/x1
375.93	1	850	5.861	1	2.094	1	0.2005	in Liquid, mass	0.4725	in liquid	2.094	1 Equilibrium Constant for Ethene y1/x1
385.09	1	900	6.205	1	2.089	1	0.2005	in Liquid, mass	0.4725	in liquid	2.089	1 Equilibrium Constant for Ethene y1/x1
394.65	1	950	6.550	1	2.083	1	0.2005	in Liquid, mass	0.4725	in liquid	2.083	1 Equilibrium Constant for Ethene y1/x1
404.82	1	1000	6.895	1	2.076	1	0.2005	in Liquid, mass	0.4725	in liquid	2.076	1 Equilibrium Constant for Ethene y1/x1
415.48	1	1050	7.239	1	2.067	1	0.2005	in Liquid, mass	0.4725	in liquid	2.067	1 Equilibrium Constant for Ethene y1/x1
427.59	1	1100	7.584	1	2.031	1	0.2005	in Liquid, mass	0.4725	in liquid	2.031	1 Equilibrium Constant for Ethene y1/x1
445.93	1	1150	7.929	1	2.031	1	0.2005	in Liquid, mass	0.4725	in liquid	2.031	1 Equilibrium Constant for Ethene y1/x1

Notes:
   ¹  Calculated by compiler. Raoult's law was used to calculate the vapor composition and K, both being approximations.

Method/Apparatus/Procedure:
   Heptane was charged into the high pressure cell, degassed, and its quantity determined by volume. A measured volume of ethene gas was added from a storage bomb at constant temperature to give a known liquid composition by a material balance. The liquid composition was considered to remain constant for the changes in temperature and pressure involved in each series of experiments because of the small gas volume used. Densities and critical properties of the solutions were also given at high pressure. Details of experimental method given in Ref. 1.
Vapor-liquid equilibria for eight ethene compositions are reported. The results for four of the compositions, in which the mole fractions are less than 0.5, may be considered solubility equilibria and are listed here.

Source and Purity of Materials:
   1. Commercial high purity ethene was fractionated then degassed by repeated freezing, evacuation and melting. Actual purity not indicated.
   2. Heptane purity not specified.

Estimated Errors:
   Solubility: δx₁/x₁ = ± 0.03 (compiler)
   Temperature: δT/K = ± 0.02
   Pressure: δP/P = ± 0.005

References:
   1. Kay, W.B., Ind. Eng. Chem. 1938, 30, 459.