“…The latter is in good agreement with the previous value on the impure material and with the reported value of 110 °C. (15) No significant differences in the heat capacity are observed from 300 to 350 K (within 33 K of melting) between the two samples.…”
Section: Fluoranthene--heat Capacity and Meltingmentioning
The heat capacities of three crystalline condensed-ring aromatic substances were studied from 5 to 350 K by adiabatic cryogenic calorimetry and into the liquid phase with the intermediate-range adiabatic calorimeter. The heat capacities, entropies, and enthalpies at 298 K, together with the triple points and enthalpies of melting are:
“…The latter is in good agreement with the previous value on the impure material and with the reported value of 110 °C. (15) No significant differences in the heat capacity are observed from 300 to 350 K (within 33 K of melting) between the two samples.…”
Section: Fluoranthene--heat Capacity and Meltingmentioning
The heat capacities of three crystalline condensed-ring aromatic substances were studied from 5 to 350 K by adiabatic cryogenic calorimetry and into the liquid phase with the intermediate-range adiabatic calorimeter. The heat capacities, entropies, and enthalpies at 298 K, together with the triple points and enthalpies of melting are:
“…Ebulliometric vapor pressure data determined in this work are included in the deviation plots to show their temperature range. 1 Percent in pressure deviation graph for the vapor pressure of perhydroacenaphthylene with the zero line representing eq 5 with the parameters of Table (Δ p = p Cox − p exp ): ○, this work; ◇, Grosse et al; □, Schneider et al; ▴, Zakharkin et al; ·, Boldt et al The dashed line connecting the adjacent points symbolizes the boiling range at a given pressure reported by the author. 2 Percent in pressure deviation graph for the vapor pressure of perhydrophenanthrene with the zero line representing eq 5 with the parameters of Table (Δ p = p Cox − p exp ): ○, this work; ◇, Pinkney et al; ▴, Durland and Adkins 2 ; □, Linstead and Walpole 3 ; *, Linstead; ▪, Grosse et al; shaded triangle, Boelhouwer et al; ▵, Schneider et al; shaded box, API RP 42; +, Eimasry and Gisvold; ×, Allinger et al 1 ; - - -, TRC Tables …”
Section: Resultsmentioning
confidence: 99%
“…Linstead and Walpole 3 reported two boiling points at slightly different pressures in a study of stereoisomerism of perhydrophenanthrenes. Grosse et al 20 reported a boiling temperature range in a pressure range determined in a study of catalytic dehydrogenation of polycyclic naphthalenes that included perhydroacenaphthylene. Schneider et al 21 determined a boiling temperature range of a mixture of four isomers at a single pressure during distillation of products of hydrogenation of phenanthrene.…”
Saturated vapor pressures and liquid heat capacities have been measured for liquid perhydroacenaphthylene and perhydrophenanthrene by comparative ebulliometry over an approximate pressure range from (8 to 100) kPa and by heat conduction calorimetry over a temperature range from about (305 to 335) K. The obtained results for vapor pressures and for heat capacities have been represented within experimental uncertainties by the Antoine and the Cox equations and by an empirical polynomial equation, respectively, and compared with the data available in the literature.
“…The catalyst used for this work was a chromealumina type catalyst designated by Universal Oil Products Co. as type J-2 dehydrogenation catalyst. It was first prepared by Grosse, Morrell, and Mattox ( 12) and has been used in other investigations (11). The catalyst was in the form of cylindrical pellets, Vs by Vs inch.…”
A n unutilized by-product of the sulfite pulping of spruce, p-cymene is also produced by the naval stores industry from terpenes. A dehydrogenation product, p,a-dimethylstyrene, could be used in synthetic rubber and polymers. I
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