Liquid Extraction
Cód:
491_9781443724746
LIQUID EXTRACTION by ROBERT E. TREYBAL. PREFACE: The unit operation, liquid extraction, has rapidly assumed major indus trial significance as a means of separating the components of solutions. Whereas simple extraction procedures have been a Omrngn and familiar laboratory practice for many years, in the technical application to large scale industrial processes a wide variety of complex flowsheets and equip ment types has been developed, the usefulness of which has not been thor oughly explored. As so frequently happens, the needs of the chemical industry have advanced much more rapidly than the accumulation of design data necessary for adequate application of these techniques. Much of the resulting confusion and possible hesitancy in applying extraction to separa tion problems can be removed by outlining its potentialities and limitations in organized form. It is sincerely hoped that this book will be of service in this respect. Relatively little instruction is given in liquid extraction in undergraduate chemical-engineering courses, and graduate courses have been developed only recently. As a consequence, many chemical engineers and chemists who must work with extraction have had little if any formal introduction to the subject. It is one of the purposes of this book to provide a text suitable not only for organized courses, but also for those who must study without benefit of guidance. To this end, the book contains many illustrative examples worked out in detail and a collection of problems for student practice. In addition, for those who may wish to investigate sources of original data, fairly complete bibliographies are appended to each chapter. In so far as it was possible a consistent notation was used throughout the book the number of mathematical symbols required was so great, however, that duplicate meanings for a few could not be avoided. The table of notation at the end of each chapter provides adequate definition of these so that there should be no conf
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