UOP characterization factor

The UOP characterization factor is perhaps one of the more widely used derived characterization or classification factors and is defined by the formula 

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Characterization factor the UOP characterization factor K, defined as the ratio of the cube root of the molar average boiling point, TB, in degrees Rankine (°r = °F + 460), to the specific gravity at 60°F/60°F ... 

Maxwell and Bonner [Ind. Eng. Chem., 49, 1187 (1957)], which is given in great detail in the API Technical Data Book—Petroleum Refining (op. cit.) and in the ASTM D 2892 test method. It includes a correction for the nature of the sample (paraffin, olefin, naphthene, and aromatic content) in terms of the UOP characterization factor, UOP-K, as given by... 

In this appendix we present the results of the work of Smith and Watson and associates who related petroleum properties to a factor known as the characterization factor (sometimes called the UOP characterization factor). It is defined as... 

Other averages for boiling points are used in evaluating K and the other physical properties in this Appendix. (Refer to Danbert or Maxwell S for details.) This factor has been related to many of the other simple tests and properties of petroleum fractions, such as viscosity, molecular weight, critical temperature, and percentage of hydrogen, so that it is quite easy to estimate the factor for any particular sample. Furthermore, tables of the UOP characterization factor are available for a wide variety of common types of petroleum fractions as shown in Table K.l for typical liquids. 

Another derived number, the UOP characterization factor, is also a widely used method for defining petroleum the Characterization Factor is derived from the formula ... 

This parameter, along with the Universal Oil Products (UOP) characterization factor, has been used, to some extent, as a means of classifying crude oils. Both parameters are usually employed to give an indication of the paraffinicity of the petroleum. Both have been used, if a subtle differentiation can be made, as a means of petroleum characterization rather than for petroleum classification. 

Aromaticity is indicated by UOP characterization factor and carbon-to-hydrogen ratio however, the most commonly used indicator is the Bureau of Mines Correlation Index (B.M.C.I.). Carbon black yields in general improve as the aromatic content increases. 

Stuckey (75) developed calculation response factors that take into account the chemical nature of the sample. The UOP characterization factor is a measure of chemical character and is used along with boiling point to determine the appropriate response factor (76). 

Calculation of UOP Characterization Factor and Estimation of Molecular Weight of Petroleum Oils, Method 375, UOP Laboratory Test Methods for Petroleum and Its Products, UOP Inc., Des Plaines, IL, 1986. 

The most useful means of estimating the phytical properties of cracked iF.aterials is the UOP Characterization Factor (pages 81 to 85, Fig. 5-9, and Table 4-2). In most cases. Characterization Factors are somewhat as follows ... 

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