Extraction of Natural Products Using Near-Critical Solvents (inbunden)
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Inbunden (Hardback)
Antal sidor
1993 ed.
Chapman and Hall
King, M.B. (ed.), Bott, T.R. (ed.)
XI, 325 p.
234 x 156 x 19 mm
645 g
Antal komponenter
1 Hardback
Extraction of Natural Products Using Near-Critical Solvents (inbunden)

Extraction of Natural Products Using Near-Critical Solvents

Inbunden Engelska, 1992-12-01
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The aim of this book is to present the current state of the art of extracting natural products with near-critical solvents and to view the possibilities of further extensions of the technique. Relevant background theory is given but does not dominate the book. Carbon dioxide is the near-critical solvent used in most recent applications and inevitably receives prominence. In addition to general descriptions and reviews, the book contains three chapters by indus trial practitioners who describe in detail the operation of their processes and discuss the market for their products. Sections on the design of the pressure vessels and pumps required in these processes and on the acquisition of the data required for design are included. The costing of the processes is also discussed. There is good scope for combining a near-critical extraction step with other process steps in which the properties of near-critical solvents are utilised, for example as a reaction or crystallisation medium and a chapter is devoted to these important aspects. It is hoped that the work will be found to contain a great deal of specific information of use to those already familiar with this field. However the style of presentation and content is such that it will also be useful as an introduction. In particular it will be helpful to those wondering if this form of separation method has anything to offer for them, whether they are engineers, chemists or managers in industry, or in academic or research institutions.
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Introduction. Food legislation and the scope for increased use of near-critical fluid extraction operations in the food, flavouring and pharmaceutical industries. Other uses for near-critical solvents: chemical reaction and recrystallization. Commercial scale extraction of alpha acids and hop oils with compressed carbon dioxide. Commercial scale decaffeination of coffee and tea using supercritical CO2. Extraction of flavours and fragrances with compressed CO2. Physico-chemical data required for the design of an NCF extraction process. Design and operation of the pressure vessels used in near-critical extraction processes. Pumps and compressors for supercritical extraction. Estimation of separation cost. Index.