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Batch separations with tails recycle
Author(s) -
Colbert John W.
Publication year - 1972
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450500511
Subject(s) - fraction (chemistry) , rectification , cascade , work (physics) , chromatography , process engineering , separation (statistics) , batch distillation , batch processing , chemistry , mathematics , computer science , thermodynamics , engineering , physics , statistics , distillation , fractional distillation , power (physics) , programming language
This study develops material balance calculation techniques for repetitive batch separation processes in which the tails stream is collected in fractions which are recycled to the next batch at appropriate intervals. Criteria for selecting the fraction sizes which minimize total separative work per unit of products are determined. In the electrolytic rectification of a D 2 O‐H 2 O mixture from 20 to 99.8% D 2 O at a separation factor of 11, for example, three fractions thus selected are adequate and the separative work is considerably less than that of the more conventional cascade system.