Download or read book Supercritical Fluid Extraction written by Mark McHugh and published by Elsevier. This book was released on 2013-10-22 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercritical Fluid Extraction is a technique in which CO2 is used under extremely high pressure to separate solution (e.g., removing caffeine from coffee). Separations is basic to all process industries and supercritical fluid extraction is a specific type which is receiving a high level of attention. The book will combine basic fundamentals with industrial applications. The second edition has been expanded and updated and includes new chapters on chromatography and food processing. "...this is an excellent book which is both instructive and amusing to read. Its true value is neatly summarised in one of the closing sentences: 'We have supplied you with the guidelines and criteria which you can now apply when considering supercritical fluids for your own needs.'' - Chemistry in Britain, February 1995

Download or read book Natural Extracts Using Supercritical Carbon Dioxide written by Mamata Mukhopadhyay and published by CRC Press. This book was released on 2000-06-27 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesizing research from a wide variety of sources, this work offers a convenient guide to a clean, safe, inexpensive, non-toxic, non-polluting solvent that performs better than most conventional solvents. Natural Extracts Using Supercritical Carbon Dioxide reviews recent developments in the technology and its applications to the food, flavor, fragrance, and pharmaceutical industries. It outlines the many advantages that this method has over traditional methods like steam distillation, solvent extraction, and molecular distillation, and it supports the popular trend toward the use of natural products in these industries.

Download or read book Analytical Supercritical Fluid Extraction written by Maria D. Luque de Castro and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in analytical chemistry have turned it into a virtually unrecognizable science compared to a few decades ago, when it lagged behind other sciences and techniques. However, advances in analytical science have been far from universal: while innovations in instrumentation and data acquisition and processing systems have reached unprecedented levels thanks to parallel breakthroughs in computer science and chemo metrics, progress in preliminary operations has been much slower despite their importance to analytical results. Thus, such clear trends in analytical process development as automation and miniaturization have not reached preliminary operations to the same extent, even though this area is pro bably in the greatest need. Improvement in preliminary operations is thus an urgent goal of analytical chemistry on the verge of the twenty first century. Increased R&D endeavours and manufacture of commercially available automatic equipment for implementation of the wide variety of operations that separate the uncollected, unmeasured, untreated sample from the signal measuring step are thus crucial on account of the wide variability of such operations, which precludes development of all-purpose equipment, and the complexity of some, particularly relating to solid samples. Supercritical fluid extraction opens up interesting prospects in this context and is no doubt an effective approach to automatioI1 and mini aturization in the preliminary steps of the analytical process. The dramatic developments achieved in its short life are atypical in many respects.

Download or read book Extraction with Supercritical Gases written by Gerhard M. Schneider and published by Wiley-VCH. This book was released on 1980 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis with Supercritical Fluids Extraction and Chromatography written by Bernd Wenclawiak and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of supercritical fluids in analytical chemistry is still grow ing. More and more analysts are discovering the favorable advan tages for a number of applications. Especially supercritical fluid extraction (SFE) has attracted a lot of interest in recent years due to its simplicity. Supercritical fluid chromatography (SFC) has become better established and the development of this technique has been accelerated by the many applications with capillary col umns which have been published in the literature. At first SFC equipment was based on instruments commonly used for liquid chromatography, and the first commercial in struments were derived from this technology. However, capillary columns can be much more easily interfaced to gas chromatogra phy equipment especially to the detectors commonly used for Oc. Many stationary phases both for packed micro columns and capillary columns have been designed for SFC purposes extending this technology to LC and OC. The most common fluid applied in SFC and SFE is carbon dioxide. The advantages of supercritical CO , such as having dif 2 fusivity like a gas and solvating power depending on temperature and pressure, are also valid for other fluids and modified fluids. Both properties are valuable for sample extraction and extraction selectivity.

Download or read book Analytical Supercritical Fluid Extraction Techniques written by E.D. Ramsey and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past decade supercritical fluid extration (SFE) has attracted considerable attention as a sample preparation procedure in analytical chemistry. The successful implementation of this technique can lead to improved sample throughput, more efficient recovery of analytes, cleaner extracts, economic replacement of halogenated solvents and a high level of automation, compared to conventional sample preparation procedures. This book provides an overview of basic principles of SFE as well as in-depth reviews of both on- and off-line SFE methods. The on-line coupling of SFE with both chromatographic and spectroscopics techniques has been the subject of a great deal of research effort and is dealt with in detail. Newer developments, such as off-line SFE of solid and liquid matrices, are starting to attract a great deal of interest, and the coverage of these areas will prove of particular value to the analytical chemist. The international team of authors has illustrated these topics with many `state-of-the-art' applications, and each chapter provides a comprehensive list of references. For the convenience of the reader, an appendix which contains pressure conversion scales and supercritical fluid carbon dioxide density tables appears at the end of the book. The volume's extensive coverage of both on-line and off-line extraction will be particularly useful to analytical chemists, in a wide range of environments, seeking to develop high quality, simple and robust SFE methods.

Download or read book Supercritical Fluid Extraction of Nutraceuticals and Bioactive Compounds written by Jose L. Martinez and published by CRC Press. This book was released on 2007-11-28 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhanced concern for the quality and safety of food products, increased preference for natural products, and stricter regulations on the residual level of solvents, all contribute to the growing use of supercritical fluid technology as a primary alternative for the extraction, fractionation, and isolation of active ingredients. As a solvent-free p

Download or read book Practical Supercritical Fluid Chromatography and Extraction written by Thomas Caudell and published by Routledge. This book was released on 2018-05-08 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exploration of fundamental as well as practical aspects of supercritical fluid chromatography and extraction. It addresses topics such as: packed columns in SFC; detection in SFC; supercritical fluid chromatography/mass spectroscopy; and evaporative light scattering detection in SFC.

Download or read book Supercritical Fluid Extraction and its Use in Chromatographic Sample Preparation written by S.A. Westwood and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: by Professor D. E. Games, Mass Spectrometry Research Unit, University College of Swansea Sample preparation can be viewed as occupying a Cinderella role in analytical science. However, the quality of sample preparation plays a key role in high In the past decade, there has been quality analysis and deserves higher stature. considerable interest in the use of supercritical fluid extraction (SFE) as an alternative to conventional procedures for the preparation of samples for ana lysis. The driving force for this development is the need for automated, sim pler, faster, non-destructive and selective methods for extraction, preferably using non-toxic extraction media which are easily disposed of. Utilization of supercritical fluids for extraction fulfils these requirements because of their unique physical chemical properties and usually low toxicity. Selectivity can be achieved by suitable selection of pressure (density), temperature and modi fier conditions which enable solvating power to be varied. The high diffusivity of supercritical fluids provides rapid sample penetration and extraction. Use of fluids with low critical temperatures enables extraction to be conducted under mild thermal conditions ensuring that thermally labile compounds do not decompose. The technique can be used off-line, and the extracts analysed by appropriate techniques, or it can be used on-line, by coupling with a variety of chromatographic techniques. These can then, if necessary, be coupled fur ther with spectroscopic techniques, such as Fourier transform infrared, ultra violet or mass spectrometry, to provide specific identification or structural information.

Download or read book Supercritical Fluid Extraction written by Jason Lindy and published by . This book was released on 2014-01-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The technology of application of fluids in the supercritical state is a viable option and a high quality scientific method for obtaining materials, insulation, and extractions among other situations in which it may be applied yielding a high quality material. Due to its wide range of application, it has been extensively used to investigate different raw materials focusing on obtaining high quality products and applicability in various industrial segments. Its use has been mentioned in several studies as a high-quality and efficient technology for obtaining high-value added products. This book discusses the technology used in supercritical fluid extraction, as well as its applications and limitations.

Download or read book Extraction par fluide supercritique written by Perrut and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mise au point d un pilote d extraction par fluide supercritique fonctionnement r gul application l extraction de compos s naturels written by Minh Chanh Ho and published by . This book was released on 1995 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'UTILISATION DU DIOXYDE DE CARBONE (CO2) SUPERCRITIQUE POUR L'EXTRACTION DE COMPOSES NATURELS CONSTITUE UNE ALTERNATIVE INTERESSANTE AUX PROCEDES A SOLVANTS ORGANIQUES LIQUIDES A PLUSIEURS TITRES: POUVOIR SOLVANT MODULABLE, EXTRACTION A TEMPERATURE AMBIANTE, SOLVANT INERTE, ABSENCE DE RESIDUS. UN PILOTE D'EXPERIMENTATION A FONCTIONNEMENT REGULE A ETE CONSTRUIT POUR L'ETUDE DE L'EXTRACTION DE DIVERS SUBSTRATS VEGETAUX: GRAINES ET AIGUILLES DE PIN, MOUSSE DE CHENE LE RECOURS A DES MODELES CINETIQUES ET THERMODYNAMIQUES D'EQUILIBRE DE PHASES FACILITENT LA RECHERCHE DES CONDITIONS OPERATOIRES OPTIMALES ET L'INTERPRETATION DES DONNEES EXPERIMENTALES

Download or read book Modeling Simulation and Optimization of Supercritical and Subcritical Fluid Extraction Processes written by Zainuddin A. Manan and published by John Wiley & Sons. This book was released on 2021-11-02 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a complete guide on tools and techniques for modeling of supercritical and subcritical fluid extraction (SSFE) processes and phenomena. It provides details for SSFE from managing the experiments to modeling and optimization. It includes the fundamentals of SSFE as well as the necessary experimental techniques to validate the models. The optimization section includes the use of process simulators, conventional optimization techniques and state-of-the-art genetic algorithm methods. Numerous practical examples and case studies on the application of the modeling and optimization techniques on the SSFE processes are also provided. Detailed thermodynamic modeling with and without co-solvent and non equilibrium system modeling is another feature of the book.

Download or read book Supercritical Fluid Extraction Technology written by Asian Symposium on Supercritical Fluid Extraction Technology of Natural Products and published by . This book was released on 1996 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Supercritical Fluid Extraction written by Larry T. Taylor and published by Wiley-Interscience. This book was released on 1996-03-13 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: By encouraging a deliberate, systematic approach to supercritical fluid extraction (SFE) methods and techniques, this book enables scientists and technicians to avoid disappointing results and erroneous conclusions and develop reliable guidelines for using this versatile technology.

Download or read book Supercritical Fluid Extraction and Chromatography written by Bonnie A. Charpentier and published by . This book was released on 1998 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book EXTRACTION PAR LE DIOXYDE DE CARBONE SUPERCRITIQUE DE POLLUANTS CONTENUS DANS DES SOLIDES written by VALERIE.. CAMEL and published by . This book was released on 1994 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'EXTRACTION PAR LES FLUIDES SUPERCRITIQUES A ETE UTILISEE DANS LE BUT DE DETERMINER AVEC PRECISION DES TRACES DE POLLUANTS CONTENUS DANS DES SOLS. CE MEMOIRE S'ARTICULE AUTOUR DE TROIS PARTIES. TOUT D'ABORD, APRES UN BREF RAPPEL DES PROPRIETES DES FLUIDES SUPERCRITIQUES, LE CRITERE DE CHOIX D'UN FLUIDE EN EXTRACTION EST EXPOSE, AINSI QU'UNE METHODE RAPIDE D'ESTIMATION DU PARAMETRE DE SOLUBILITE. PUIS, LE PRINCIPE DE L'EXTRACTION ET SON MODELE THEORIQUE SONT DECRITS. LES DIFFERENTS MODES DE COUPLAGE AVEC LES PRINCIPALES TECHNIQUES D'ANALYSE ET D'IDENTIFICATION SONT EGALEMENT DETAILLES. ENSUITE, LES RESULTATS EXPERIMENTAUX OBTENUS SONT EXPOSES. DANS UN PREMIER TEMPS, NOUS AVONS ETUDIE L'EFFICACITE DE LA COLLECTION DES EXTRAITS. PUIS, NOUS AVONS REALISE UNE ETUDE EXHAUSTIVE DES PARAMETRES REGISSANT L'EXTRACTION POUR UN SOLUTE TEST, UN PHOSPHONATE, DEPOSE SUR UNE MATRICE INERTE AFIN DE LIMITER AU MAXIMUM LES INTERACTIONS SOLUTE-MATRICE. NOUS AVONS MIS EN EVIDENCE LE ROLE DU SOLVANT DE DEPOT, L'INFLUENCE DE LA PRESSION ET DE LA TEMPERATURE, L'IMPORTANCE D'UN CONTROLE DU DEBIT ET DE LA VITESSE LINEAIRE DANS LA CELLULE. FINALEMENT, NOUS AVONS POLLUE ARTIFICIELLEMENT DES SOLS ET ETUDIE L'IMPORTANCE DES INTERACTIONS SOLUTE-MATRICE SELON LA NATURE DU SOLUTE ET DE LA MATRICE. LES SOLUTES SONT PLUS DIFFICILEMENT EXTRAITS DE CERTAINES MATRICES (LE TAUX DE CARBONE ET LA SURFACE SPECIFIQUE JOUANT UN ROLE TRES IMPORTANT). D'AUTRE PART, CERTAINS COMPOSES SONT FACILEMENT EXTRAITS, MEME SUR DES SOLS VIEILLIS, ALORS QUE D'AUTRES SONT TRES RETENUS. DANS CE CAS, NOUS AVONS MIS EN EVIDENCE L'IMPORTANCE D'UNE ELEVATION DE LA TEMPERATURE D'EXTRACTION, CELLE-CI PERMETTANT DE FAVORISER LA DESORPTION DES MOLECULES DE SOLUTE FIXEES SUR LES SITES ACTIFS DE LA MATRICE. L'AJOUT DE MODIFICATEUR POLAIRE AU FLUIDE SUPERCRITIQUE DONNE EGALEMENT DE MEILLEURS RENDEMENTS D'EXTRACTION, MAIS PEUT CONDUIRE A L'ELUTION DES COMPOSES EXTRAITS LORS D'UN PIEGEAGE SUR UN SUPPORT SOLIDE