Extraction of Natural Products Using Near-Critical Solvents

ISBN 10: 0751400696 / ISBN 13: 9780751400694

Editore: Springer, 1992

Pages are clean and are not marred by notes or folds of any kind. ~ ThriftBooks: Read More, Spend Less. Codice articolo G0751400696I2N00

Riassunto:

This study describes a technology for extracting natural products with compressed gaseous solvents or liquified gases. The principle advantage of these techniques is that they leave the products uncontaminated. The term "near-critical" is used because the temperature at which the extraction operations are carried out is close to the critical temperature of the solvent. Commercial applications are mainly in the food, beverage and perfumery industries where carbon dioxide is usually used due to its health and safety characteristics. Uses include extraction of hop essences from hops, extraction of essences from herbs and spices, and decaffeination of tea and coffee. Consumer resistance to the use of synthetic organic solvents in food processing and the banning of other solvents due to their effect on the ozone layer mean that the use of near-critical CO2 is increasing and will continue to increase. This book describes in detail the near-critical extraction processes in use today in a practical way with reference to background theory and relevant market trends. Other ways in which solutions in near-critical solvents are useful, for example as reaction and recrystallization media, are also described.

Contenuti: 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.

Dati bibliografici

Titolo: Extraction of Natural Products Using ...
Casa editrice: Springer
Data di pubblicazione: 1992
Legatura: Hardcover
Condizione: As New
Condizione sovraccoperta: No Jacket