the Tabulation of Edmister and Okamoto [7]is followed in solving
for the atmosphericEFV curve.
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Vol %distilled
ASTM EFV
t, F Interval, % t t t, F
0 95 - - - 150
- - 0-10 55 25 -10 150 - - - 175
- - 10-30 105 75 -
30 255 - - - 250
- - 30-50 75 47 -
50 330 - - - 297
- - 50-70 80 48 -
70 410 - - - 345
- - 70-90 100 62 -
90 510 - - - 407
- - 10-100 87 42 -
100 597 - - - 449
The ASTM 30-10 % temperature difference is 105 F.
The EFV 50% temperature is read from Fig. 3.17. temperature
difference ( functionof percent distilled) are read from Fig.
3.18.
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% distilled TBP760 mmHg,
t, F
EFV, 760 mmHg,t F EFV, 10 mmHg,t, F
Uncorr. Corr Uncorr. Corr.
Initial 105 - -212 428
498
-212 28610 290 - -184 456 -184 314
30 510 - -98 542 -98 400
50 650 640 +5 645 +5 503
70 760 - +93 733 +93 591
90 830 - +168 808 +168 666
End pt. 950 - +190 830 +190 688
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%/8,760
290760
TBPslope
Interrelationship between ASTM and TBp distillationcurve data
are necessary for transposition from onetype of distillation curve
to the other if completeexperimental data are not available.
Correlationrelating the 50 % temperatures and slopes have
beenreported for atmospheric pressure [18] andsubatmospheric
pressure [27]
