<Measurements of Isobaric Boiling Point Curves at High and Low Pressures> Received on July 12, 1968 ** Kazuo Kojima (Dept. Eng. Chem., Nihon Univ., To

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1 <Measurements of Isobaric Boiling Point Curves at High and Low Pressures> Received on July 12, 1968 ** Kazuo Kojima (Dept. Eng. Chem., Nihon Univ., Tokyo) Fig. 1 Schematic diagram of the experimental apparatus Chem. Eng., Tokyo Metropolitan Univ., Tokyo) for boiling points measurement at high pressure

2 T a b l e 1 P h y s i c a l p r o p e r t i e s o f t h e m a t e r i a l s Fig. 2 Schematic diagram of the experimental apparatus for boiling points measurement at low pressure Fig. 3 Electric circuit for thermometer resistance measurements

3 Table 2 Experimental vapor pressure data for Methanol and Ethanol Table 4 Experimental values of the boiling points for Methanol (1) `Water (2) system, t Table 3 Constants of Antoine equation for Methanol and Ethanol, logp=a-b/(t+c)

4 T a b l e 5 E x p e r i m e n t a l v a l u e s o f t h e b o i l i n g p o i n t s for Ethanol (1) `Water (2) system, t [ Ž] F i g. 4 B o i l i n g p o i n t s f o r E t h a n o l ( 1 ) ` W a t e r ( 2 ) s y s t e m

5 T a b l e 6 A c t i v i t y c o e f f c i i e n t s i n l i q u i d p h a s e a t i n f i n i t e d i l u t i o n, 0 T a b l e 7 S m o o t h e d v a l u e s o f t h e b o i l i n g p o i n t s a n d c a l c u l a t e d v a l u e s o f t h e v a p o r c o m p o s i t i o n f o r M e t h a n o l ( 1 ) ` W a t e r ( 2 ) s y s t e m T a b l e 8 S m o o t h e d v a l u e s o f t h e b o i l i n g p o i n t s a n d c a l c u l a t e d v a l u e s o f t h e v a p o r c o m p o s i t i o n f o r E t h a n o l ( 1 ) ` W a t e r ( 2 ) s y s t e m

6 Fig. 5 Vapor-liquid equilibrium data N o m e n c l a t u r e A,B,C = constants of Antoine equation An, Bn,Cn= constants in Eq.(2) E =voltage drop in standard resistance Et =voltage drop in thermometer resistance [volt] [] n =number of increments ] [volt] P =vapor pressure [atm]

7 R =gas constant [ a t m E c c / g - m o l K] Rs =standard resistance [ohm] Rs =thermometer resistance [ohm] T =absolute temperature [ K] t =temperature [ Ž] V =molar volume [cc/g-mol] =mol fraction in liquid phase [] y mol fraction in vapor phase [] =second virial coefficient [c c / g - m o l] =activity coefficient [ ] =increment of x [ ] =imperfection pressure coefficient [ ] =total pressure [atm] Subscripts L =liquid phase V =vapor phase 1 =light component 2 =heavy component Supescript 0 =infinite dilution Literature 1) Barttins, R., et al.: J. Chem. Phys, 32, 1389 (1960) 2) Beebe, A.H. Jr., K.E. Coulter, R.A. Lindsay and E.M. Baker: Ind. Eng. Chem., 34, 1501 (1942) 3) Black, C.: Ind. Eng. Chem., 50, 391 (1958) 4) Bridgeman, O.C. and E.W. Aldrich: Trans. ASME, Ser. C, 86, 279 (1964) 5) Chu, J.C.: "Distillation Equilibrium Data", Reinhold, New York (1950) 6) Cottrell, F.G.: J. Am. Chem. Soc., 41, 721 (1919) 7) Dever, D.F., A. Finch and E. Grunwald: J. Phys. Chem., 59, 668 (1955) 8) Ellis, S.R.M. and D.A. Jonah: Chem. Eng. Sci, 17, 971 (1962) 9) Fowcett, F.S.: Ind. Eng. Chem., 38, 338 (1946) 10) Gautreaux, M.F. and J. Coates: A.I. Ch. E. Journal, 1, 496 (1955) 11) Hala, E., et al.: Coll. Czech. Chem. Commun., 19, 417 (1954) 12) Hirata, M.: Kagaku Kagaku (Chem. Eng., Japan), 14, 65 (1954) 13) Hirata, M., S. Suck and H. Onodera: Kagaku Kogaku (Chem. Eng., Japan), 31, 339 (1967) 14) Hirata, M. and S. Suda: Kagaku Kogaku (Chem. Eng, cited 15) Kay, W.B. and W.E. Donham: Chem. Eng. Sci., 4, 1 (1955) 16) Kirschbaum, E. and F. Gerstner: Z. Ver. dtsch. Ing., Beih. Verfahrenstechn., 10 (1939) 17) Kojima, K., K. Tochigi, H. Seki and K. Watase: Kagaku Kogaku, 32, 149 (1968) 18) Merriman, R.W.: J. Chem. Soc. (London), 103, 628 (1913) 19) Osborne, N.S., H.F. Stimson, E.F. Fiock and D.C. Ginnings: J. Research Natl. Bur. Standards, 10, 155 (1932) 20) Othmer, D.F. and R.F. Benenati: Ind. Eng. Chem., 37, 299 (1945) 21) Othmer, D.F. and F.R. Morley: Ind. Eng. Chem, 38, 751 (1946) 22) Otsuki, H. and F.C. Williams: Chem. Eng. Prog. Symposium Ser., No (1953) 23) Stimson, H.F.: J. Research,Natl. Bur. Standards, 75A, 139 (1961) 24) Swietoslawski, W.: Roczn. Chem., 5, 96 (1925) 25) Tao, L.C.: Ind. Eng. Chem., 53, 307 (1961) 26) Timmermans, J.: "Physico-chemical Constants of Pure Organic Compounds", Vol.1,2, Elsevier Pub., New York (1950, 1965) 27) Williams, F.E.: (nd. Eng. Chem., 39, 779 (1947) 28) Young, S.: Sci. Proc. Soc. Dublin, 12, 374 (1910) * <Solubility of Carbon Dioxide in Aqueous Alcohol Soluti - Eng., Kansai Univ., Suita, Japan) ons> Received on November 4, 1968 Dept. of Chem. Eng., Kyoto Univ., Kyoto, Japan

Fig. 1 Flow diagram of experimental apparatus employed Fig. 2 Porosity change during sulfurization of reduced sample pellets

Fig. 1 Flow diagram of experimental apparatus employed Fig. 2 Porosity change during sulfurization of reduced sample pellets Fig. 4 Simultaneous reduction-sulfurization and direct sulfurization of iron