Dense Gases for Extraction and Refining [Paperback]

Procedures for extracting or refining sensitive substances using dense gases have been developed for numerous purposes. Dense carbon dioxide is already being used industrially for decaffeination of coffee and extraction of hops. Further possible applications have been tested on the laboratory or pilot plant scales and shown to be mostly economical. Uses as varied as the non-aggressive extraction of spice, extraction of polymers, refining of spent oil, pyrolysis/extraction of wood and liquefaction of coal show the extremely wide range of application. The book comprehensively reviews the present state of development and features examples of application of this new technique.Procedures for extracting or refining sensitive substances using dense gases have been developed for numerous purposes. Dense carbon dioxide is already being used industrially for decaffeination of coffee and extraction of hops. Further possible applications have been tested on the laboratory or pilot plant scales and shown to be mostly economical. Uses as varied as the non-aggressive extraction of spice, extraction of polymers, refining of spent oil, pyrolysis/extraction of wood and liquefaction of coal show the extremely wide range of application. The book comprehensively reviews the present state of development and features examples of application of this new technique.I. General Picture of Separation Procedures.- I.1 Principles of Substance Separation.- I.2 Conventional Methods of Extraction.- References.- II. Basic Principles of Extraction with Dense Gases.- II.1 Historical Review.- II.2 Definition of Terms.- II.3 Special Features of Dense Gases.- II.4 Thermodynamic Fundamentals.- II.4.a Description of the Solvent Circulation.- II.4.b Considerations of Phase Equilibria.- II.4.c Calculations of Phase Equilibria.- References.- III. Methods, Apparatus and Plants.- III.1 Procedures for Determining Phase Equilibria.- III.1.a The Synthetic Method.- III.1.b The Analytical Method.- III.1.c The Dynamicl“,