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0 0.2 0« 0 6 0 8 '0 ■r So<<>ng DOtnt. any comoon«"».

Tn Boiling ooint. neovies' eomoor*n\ *P

0 0.2 0« 0 6 0 8 '0 ■r So<<>ng DOtnt. any comoon«"».

Tn Boiling ooint. neovies' eomoor*n\ *P

FIG l-13b EBP for heaviest component. [From Lenoir and White, Petrol. Refiner (March, ¡958). p. 173. Copyright Gulf Publishing Company, Houston, Texas (1958).]

(M. Van Winkle, "Distillation", 1967, by courtesy, McGraw-Hill Book Company.)

Temptrolwe, "F

rw ■ 1- 14 a Convergente pressures for liglil component of mixtures; Mil* 259 I with parameters of F.lll',,. |from Lenoir mul » hue, Petrol. Refiner [March, /9S.V. p. >7.1. Copyright (¡ni/ l'iihlnhiitjf Company, Houston, Texas (/V.W).)

(M Van Wi nkle, "Distillation" , 1967, by court esy.

lie; 1_ 14b Convcigciwe pressures fur liglH uMiipoiuui of midlines, l lll> 220 I' will) p:ir;imcli-is of I III',,. (/1<>/>>

l.rwii ,uul H /i((<-, I't liol Kt'/iiirr ( Miik /i. IVSXI./' 17 I < *»V',f

(iillf i'iihli\hinx ( <f/ii/iiirM . llmiMiHi, ft-\n\ 1 /S.s-) |

Temptfotixe.

lie; 1_ 14b Convcigciwe pressures fur liglH uMiipoiuui of midlines, l lll> 220 I' will) p:ir;imcli-is of I III',,. (/1<>/>>

l.rwii ,uul H /i((<-, I't liol Kt'/iiirr ( Miik /i. IVSXI./' 17 I < *»V',f

(iillf i'iihli\hinx ( <f/ii/iiirM . llmiMiHi, ft-\n\ 1 /S.s-) |

McGraw-Hill Book Company.)

|APPLICATION OF CONVERGENCE PRESSURE CHARTS A number of K-value charts in terms of convergence pressures are available in the ¡literature (6). The GPA (64).published a graphical correlation in terrns- cf the conv cressurs, './hi»'i in primarily applicable for alkanes and alkenes but does include charts for nitrogen, hydrogen ! sulfide and carbon dioxide, and may not be applicable when a considerable amount of aromatics and naphthenes are present. The API ! (57) published ? similar correlation, in which some special procedures | are used for aromatics and naphthenes.

jOne of the most widely used convergence pressure charts are the Braun j iK]_q charts (51). The K]_q charts are K-values for hydrocarbons at 10 I Ipsia, plotted as a function of temperature. Figure 1.15 illustrates j ¡some of these. Figure 1.16 relates the K-values for the components to I jthe K]_q values and the convergence pressure. j

¡The K]_o charts were primarily developed for aliphatic hydrocarbons. ' ¡Some precautions and corrections are required when using the ! convergence pressure method for other compounds. For these, the I reader is referred to the original references (50,51) or to [reference 6.

!EXAMPLE Find the K-values i 205°F.

I Compound i Methane i

Ethane ! Propane n-Butane i

| n-Pentane i j n-Hexane

I i i for the following mixture at 300 psia and

Mole Fraction Tbi/'R (6,50) in Liquid

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