Do not interpret theoretical stages as a literal count of pot-distillation passes.
Chapter-level engineering discussion by Eva Sorensen; paraphrase of printed pp. 158–172.
Rectification returns condensed liquid to contact rising vapor. Stage count, reflux, feed state and feed location interact; graphical and shortcut calculations rely on explicit simplifying assumptions.
172
158
Chapter 4: Principles of Binary Distillation. Printed pages; chapter begins at original PDF 163.
Paraphrase checked against the supplied PDF text. Verification establishes source fidelity, not independent validation of every author claim or numerical equation.
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Evidence
Rectification returns condensed liquid to contact rising vapor. Stage count, reflux, feed state and feed location interact; graphical and shortcut calculations rely on explicit simplifying assumptions.
Location and context
Eva Sorensen. Principles of Binary Distillation, printed pp. 158–172. Chapter original PDF pages 163–203. This is an original paraphrase, not a quotation.
Annotation
Do not interpret theoretical stages as a literal count of pot-distillation passes.
Verification
Source text checked; locator and source relation present. Source fidelity is verified, not every underlying claim independently established.
SRC-637 ch4, pp. 158–172 — Reflux is a separation variable, not a flavor score
Distillation: Fundamentals and Principles — full-volume analysis