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ASTM Distillation (ASTM)
ASTM distillation also uses a batch operation, but in contrast to TBP, it operates without the presence of a contact plate and a reflux ratio (R/P, or RR) of zero, as shown in Figure 4.8a. There may be a slight unintentional reflux because of the condensation of the vapor on the tube that connects the flask to the condenser.
![ASTM distillation apparatus as described in text above.](/fsc432/sites/www.e-education.psu.edu.fsc432/files/Lesson4/Lesson4Fig8A.png)
Figure 4.8a. ASTM distillation apparatus.
Credit: Dr. Semih Eser © Penn State is licensed under CC BY-NC-SA 4.0
![Distillation curve for ASTM distillation of the binary mixture A and B. More of an s curve as described in text above.](/fsc432/sites/www.e-education.psu.edu.fsc432/files/Lesson4/Lesson4Fig8b.png)
Figure 4.8b. Distillation curve for ASTM distillation of the binary mixture A and B.
Credit: Dr. Semih Eser © Penn State is licensed under CC BY-NC-SA 4.0
![TBP distillation curve for distillation of the same binary mixture shown as distinct temperature changes.described in text above.](/fsc432/sites/www.e-education.psu.edu.fsc432/files/Lesson4/Lesson4Fig7.png)
Figure 4.8c. TBP distillation curve for distillation of the same binary mixture.
Credit: Dr. Semih Eser © Penn State is licensed under CC BY-NC-SA 4.0