Propylene physical constants

Table 6.4 presents some fundamental physical constants. Critical pressures of propane and propylene are above 40 bar, but in practice 20 to 30 bar are sufficient... 

Nanbu, N. Takimoto, K. Suzuki, K. Ohtake, M. Hagiyama, K. Takehara, M. Ue, M. Sasaki, Y, Temperature dependence of physical constants of monofluororinated propylene carbonate as highly polar liquid, Chem. Lett. 2008,57,416-411. 

SL Aggarwal. Physical Constant of Poly(propylene). In J Bandrup, EH Immergut, W McDowell, eds. Pol5mer Handbook, 2nd edn. New York Wiley, 1975, pp V23-28. 

Phenolphthalein, 32 Phenothiazine, 67 Phenylacetic acid, 49, 51, 53 Phenylbutyl methyl ketone, 53 Phenylethyl alcohol, 51 Phenylethyl methyl ketone, 53 Phloretin, 43 Phloridzin, 27, 30, 43 Phloroglucinol, 42 Phosphoglycerate, 31 Physical constants, 6 Pinacol, 38 Pinene, 75 Piperonal, 53 Piperonylic acid, 51 Porphyrin, 63 Pregnanediol, 83, 84 Progesterone, 84 Propiophenone, 54 p-hydroxy-, 55 n-Propyl alcohol, 37 Propylene glycol, 38 Protocatechuic acid, 50 Protocatechuic aldehyde, 52 Z-Pulegol, 72 d-Pulegone, 72 Pyramidone, 63, 67 Pyridine, 63 Pyruvic acid, 11, 31 o-hydroxyphenyl-, 66... 

V/26 PHYSICAL CONSTANTS OF POLY(PROPYLENE) Specific Heat See Heat Capacity. 

Table 4 Hsts various physical and chemical properties and constants for the propylene glycols. A comprehensive source for additional physical and chemical properties is Reference 25.

Physical Methods that have been Used to Monitor Reaction Kinetics. In this section some physical property measurements of general utility are discussed. One of the oldest and most useful techniques used in kinetics studies involves the measurement of the total pressure in an isothermal constant volume reactor. This technique is primarily used to follow the course of homogeneous gas phase reactions that involve a change in the total number of gaseous molecules present in the reaction vessel (e.g., the hydrogenation of propylene). 

Some physical properties of 3-propyl-4-ethylsydnone have been determined at various temperatures <1997BCJ315>. The dielectric constant (e = 64.6 at 25°C) is high compared to many organic solvents and close to that of propylene carbonate (e = 64.9), a typical nonaqueous polar solvent. 

Chemical/Physical. The reported hydrolysis half-life for the conversion of propylene oxide to 1,2-propanediol in water at 25 °C and pH 7 is 14.6 d (Mabey and Mill, 1978). The second-order hydrolysis rate constant of propylene oxide in 3.98 mM perchloric acid and 36.3 °C is 0.124/M-sec (Kirkovsky et ah, 1998). 

Fio. 11. Effect of previous physical treatments on a sample of a-TiCl on the propylene polymerization rate, at constant pressure and temperature (t = 70° PciHi = 1,450 mm. Hg). 1 and 2 ground aTiCl (sample A) (sizes <2 it). 3 and 4 unground aTiCU (sample A) (sizes within 1 to 10 it). 

Figure 14-1 indicates that Henry s law is valid to a good approximation for the solubility C02 in propylene carbonate. In general, Henry s law is a reasonable approximation for physical solvents. If Henry s law holds, the solubility is defined by knowing (or estimating) the value of the constant H (or H ). 

Fig. 4.18. Stability constants of Ln(III) coronates in propylene carbonate at 298 K and p = 0.1 M (Et4NC104). From data reported by J.-C.G. Biinzli, in Handbook on the Physics and Chemistry of Rare Earths, eds K.A. Gschneidner, Jr., L. Eyring, Vol. 9, Ch. 60, North Holland, Amsterdam, 1987.

Fig. 5. Dielectric constant (D) of some hydroorganic solvents as a (unction of temperature. DMSO, dimethyl sulfoxide EGOH, ethylene glycol MeOH, methanol PrOH, propylene glycol MPD, 2-methyl-2,4-pentanediol. From Travers and Douzou (1970, 1974). Reprinted with permission of Journal of Physical Chemistry and Bio-chimie. Copyright by the American Chemical Society and Societe de Chimie Bio-logique.

Property data from the literature (1-55,96,11,119,124,125,139,165,168,235-249) are given in Table 11-1. The critical constants were selected from the DIPPR project (5) except for butylene oxide (31). For ethylene and propylene oxides, the values are experimental For the other compounds, the values are estimates. Additional property data sudr as acentric factor, enthalpy of formation, lower explosion limit in air and solubility in water are also available. The DIPPR (Design Institute for Physical Property Research) project (5) and recent data compilations by Yaws and co-workers (44-55) were consulted extensively in preparing the tabulation. 

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