The Recovery Of Volatile Solvents

Excerpt from The Recovery of Volatile Solvents Among the many applications of chemical engineering to the industries, that of the recovery of volatile solvents is among the most recent. This is due to several facts. In the first place the industries making use of solvents in appreciable amounts were up to within recent years of very limited extent, both as to numbers and as to size, and in the second place, the increasing cost of the solvents themselves as well as their increasing scarcity in many cases has only recently forced the industries to attempt their recovery. There has also arisen a new field in which the methods of solvent recovery are applicable which was not known a few years ago, that of the recovery of gasolene from natural gas. In view of the newness of the industry it is therefore not surprising that there has so far appeared no book dealing exclusively with this important subject, but it is rather surprising to find that the technical literature is full of references to it. The author has been able to make a search of the literature of the last forty years and has found, especially in the patent literature, a great mass of information to do with this subject, the greater part of which is included in the abstract of literature which goes to make up a portion of this volume. He believes from his experience in this field, that this portion of the book will be of the very greatest aid to engineers in connection with their design of solvent recovery apparatus, especially in connection with the search of the previous art in making patent applications. He has been very much surprised to find that, in many cases, devices that he believed to be new had been anticipated many years before. In fact he believes that so far as basic principles of solvent recovery are concerned, there is very little opportunity for inventors in this field and that future improvements in solvent recovery must lie largely in design of suitable apparatus and in improved applications of old principles. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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The pressure is on to cut plant emissions while still maintaining a cost-effective operation. Choosing the best solvent, being aware of potential problems, and the recovery of solvents has never been so important. Traditionally, solvents had been chosen on the basis of whether they can do the job effectively and economically. However, with regulations on exposure to solvent vapors becoming more stringent, selecting the solvent that meets regulatory, efficiency, and economical criteria as early as possible in the process has become paramount. Solvent Recovery Handbook, Second Edition sets out the physical properties of the fifty most commonly used solvents. The book supplies information on their behavior during and after use, health and fire hazards, the photochemical ozone creation potential (POCP), and recovery processes including practical aspects of the design and operation of batch stills. It delivers state-of-the art coverage of every available recovery and disposal technology - including removing solvents from gas, water, and residues, separating used solvents, and drying solvents. What's more, you'll find fact-filled sections on the latest equipment, safe effective operating procedures, choosing solvents with recovery in mind, and much more. Updated and expanded, Ian Smallwood's Solvent Recovery Handbook, Second Edition hands you all the practical tools you need to efficiently and cost-effectively process harmful organic solvents after re-capture.

Consolidates all the widely-scattered information on solvent properties relevant to recovery, and provides a guide to the effective recovery of solvents and to the efficient operation of plants and processes in which they are used.