Download or read book Surfactant Recovery by Liquid liquid Extraction and Reverse Micellar Extraction written by and published by . This book was released on 2007 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study aimed to investigate two extraction techniques namely liquid-liquid extraction (LLE) and reverse micellar extraction coupled with ultrafiltration process for tetrachloroethylene (PCE) removal and surfactant recovery purposes. Using surfactant solution to remediate NAPLs gains more attractions. Nevertheless, prior reusing surfactant, a decontamination of surfactant solutions is recommended. In this study, we imitated the surfactant solution similar to one pumped out of the contaminated site, which contains 4%AMA (anionic surfactant), 3%NaCl and 10,000 ppm solubilized PCE. The conventional LLE using five extracting solvents varying the equivalent alkane carbon number (EACN) was investigated to determine the partitioning of PCE from surfactant solution into solvent phase and the %PCE removal. The reverse micellar extraction is another extraction technique based on Winsor type II microemulsion formation, where the micelles break up, migrate into the solvent phase and re-aggregate to form reverse micelles. The released PCE during the micelles break up also partitions into the solvent phase. The result showed that the EACN of extracting solvent and the surfactant solution:solvent volumetric ratio were crucial parameters governing the extraction efficiency of LLE. In addition, other parameters such as molecular structure and functional groups of solvent also have an influence on the PCE partitioning and PCE removal in LLE technique. For reverse micellar extraction, the surfactant solution:solvent volumetric ratio (ranged from 40:1 to 5:1) used in this study did not show significant effects on the surfactant removal (84.9-86.9%) and PCE removal (96.7-98.4%). Furthermore, an ultrafiltration process was used as an additional downstream process after reverse micellar extraction to concentrate the surfactant reverse micelles in the retentate, while passing PCE and solvent as the permeate stream.

Download or read book Downstream Processing of Proteins written by Mohamed A. Desai and published by Springer Science & Business Media. This book was released on 2008-02-05 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Considerable effort and time is allocated to introducing cell culture and fermentation technology to undergraduate students in academia, generally through a range of courses in industrial biotechnology and related disciplines. Similarly, a large number of textbooks are available to describe the appli- tions of these technologies in industry. However, there has been a general lack of appreciation of the significant developments in downstream processing and isolation technology, the need for which is largely driven by the stringent re- latory requirements for purity and quality of injectable biopharmaceuticals. This is particularly reflected by the general absence of coverage of this s- ject in many biotechnology and related courses in educational institutions. For a considerable while I have felt that there is increasing need for an introductory text to various aspects of downstream processing, particularly with respect to the needs of the biopharmaceutical and biotechnology ind- try. Although there are numerous texts that cover various aspects of protein purification techniques in isolation, there is a need for a work that covers the broad range of isolation technology in an industrial setting. It is anticipated that Downstream Processing of Proteins: Methods and Protocols will play a small part in filling this gap and thus prove a useful contribution to the field. It is also designed to encourage educational strategists to broaden the coverage of these topics in industrial biotechnology courses by including accounts of this important and rapidly developing element of the industrial process.

Download or read book Highly Selective Separations in Biotechnology written by G. Street and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Success in meeting the challenge to produce the commercial products anticipated by the exploitation of biological processes depends upon provid ing effective separation protocols. Effectiveness can be measured in terms of selectivity, purity, resolution and validatory success. The major processing problems are associated with either the selective recovery of molecules which are present in low concentrations from complex mixtures or the selective removal of contaminants from the desired molecule. Central to the evolution of processes satisfying this demand are the regulatory requirements being imposed by governments on the purity of a product, especially in the health care market. Synthetic organic chemists are increasingly finding it advantageous to conduct one or more steps using either enzymic biotransformations where molecules with a single and consistent stereochemistry or chirality are required. The underlying princi ples behind the methods, techniques and processes currently being used and developed commercially rely upon the biospecific nature and properties of the desired molecule. When these factors are married to the more traditional techniques of precipitation, chromatography, liquid-liquid extraction and membrane processes, powerful tools emerge, allowing highly selective separations to be designed. The logical extension of these combinations is to apply genetic engineering techniques to influence the separations at a more fundamental and structural level by modifying the target protein at source, during its synthesis, to facilitate its separation in a given, selective manner, leading to the distinct possibility of producing 'designer' separation programmes.

Download or read book Surfactant Based Separation Processes written by John F. Scamehorn and published by CRC Press. This book was released on 2020-11-25 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complete with bibliographic citations and illustrations, this volume focuses on novel techniques and reviews established methods for surfactant-based separation processes that can be widely applied in industry. Describes new extraction techniques, and introduces micellar-enhanced ultrafiltration and admicellar chromatography, discusses protein extraction using reverse micelles, surfactant-enhanced carbon regeneration, and demonstrates new methods of turning waste streams containing dilute concentrations of valuable materials into product streams and examines such traditional surfactant-based methods as froth flotation and foam fractionation.

Download or read book Surfactant Based Separation Processes written by Scamehorn and published by CRC Press. This book was released on 1989-02-24 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on novel techniques and reviews established methods for surfactant-based separation processes that can be widely applied in industry. Describes new extraction techniques, micellar-enhanced ultrafiltration and admicellar chromatography, protein extraction using reverse micelles, surfactant-en

Download or read book Surfactant Based Separation Processes written by John F. Scamehorn and published by CRC Press. This book was released on 2020-11-26 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on novel techniques and reviews established methods for surfactant-based separation processes that can be widely applied in industry. Describes new extraction techniques, micellar-enhanced ultrafiltration and admicellar chromatography, protein extraction using reverse micelles, surfactant-en

Download or read book Micelles written by Y. Moroi and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Almost thirty years ago the author began his studies in colloid chemistry at the laboratory of Professor Ryohei Matuura of Kyushu University. His graduate thesis was on the elimination of radioactive species from aqueous solution by foam fractionation. He has, except for a few years of absence, been at the university ever since, and many students have contributed to his subsequent work on micelle formation and related phenomena. Nearly sixty papers have been published thus far. Recently, in search of a new orientation, he decided to assemble his findings and publish them in book form for review and critique. In addition, his use of the mass action model of micelle has received much criticism, especially since the introduction of the phase separation model. Many recent reports have postulated a role for Laplace pressure in micellization. Although such a hypothesis would provide an easy explanation for micelle formation, it neglects the fact that an interfacial tension exists between two macroscopic phases. The present book cautions against too ready an acceptance of the phase separation model of micelle formation. Most references cited in this book are studies introduced in small group meetings of colloid chemists, the participants at which included Professors M. Saito, M. Manabe, S. Kaneshina, S. Miyagishi, A. Yamauchi, H. Akisada, H. Matuo, M. Sakai, and Drs. O. Shibata, N. Nishikido, and Y. Murata, to whom the author wishes to express his gratitude for useful discussions.

Download or read book Surfactants in Solution written by K.L. Mittal and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: This and its companion volumes 7,8, and 10 document the proceedings of the 6th International Symposium on Surfactants in Solution (SIS) held in New Delhi, India, August 18-22, 1986 under the joint auspices of the Indian Society for Surface Science and Technology, and Indian Institute of Technology, Delhi. As this symposium was a landmark -- it represented the tenth anniversary of this series of symposia -- so it is very apropos to reflect on how these symposia have evolved to their present size and status. The pedigree of this series of symposia goes back to 1976 when the premier symposium in this series was held. Actually in 1976 it was a modest start and it was not possible at that time to gaze at the crystal ball and predict what would be the state of affairs in 1986. For historical purposes, it should be recorded here that the first symposium was held in Albany, NY, under the title "Micellization, Solubilization and Microemulsions"; the second symposium was christened "Solution Chemistry of Surfactants" and was held in Knoxville, TN, in 1978; the venue for the third symposium in 1980 was Potsdam, NY, and it was dubbed "International Symposium on Solution Behavior of Surfactants: Theoretical and Applied Aspects.

Download or read book Industrial Scale Natural Products Extraction written by Hans-Jörg Bart and published by John Wiley & Sons. This book was released on 2011-08-08 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the latest technologies in process engineering, this handbook and ready reference features high pressure processing, alternative solvents and processes, extraction technologies and biotransformations -- describing greener, more efficient and sustainable techniques. The result is an expert account of engineering details from lab-scale experiments to large-scale industrial design. The major focus is on the engineering aspects of extraction with organic and supercritical solvents, ionic liquids or surfactant solutions, and is supplemented by aspects of both up- and downstream processing, biotransformation, as well as a survey of typical products in food, pharmaceutical and cosmetic applications. This is rounded off by market developments, economic considerations and regulations requirements in the field Authored by experts from leading industrial and academic institutions, this is essential reading for the hands-on scientist and office manager alike.

Download or read book Reverse Micelles written by P.L. Luisi and published by Springer. This book was released on 2014-01-18 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ionic Surfactants and Aqueous Solutions written by Juan H. Vera and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-07-09 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ionic Surfactants and Aqueous Solutions: Biomolecules, Metals and Nanoparticles covers a wide range of subjects related to aqueous systems, from reverse micelles as ion exchangers to the study of micellar phase transfer catalysis for nucleophilic substitution reactions. The diverse background, expertise and professional interests of the contributors to this book give to it a unique richness of approach in topics of relevance for biotechnology and environmental studies. Over sixty publications presenting research results are combined and expanded in this book by some of the original researchers. At a mature age, and at the summit of successful professional careers, they have taken a second look to the state of the art in the fields that they had pioneered. Eva Rodil and Ana Soto, who had their research formation in the group of Professor Alberto Arce at Universidade de Santiago de Compostela, Spain, are presently professors at that university, Maen Husein is a professor at University of Calgary, Canada. Remy Dumortier, Mohammad Khoshkbarchi, Hamid Rabie and Younok Dumortier Shin, are presently active leaders in the industrial world in Canada and the USA. The editors are retired academics from McGill University, Montreal, Canada, and coauthors of the book Classical Thermodynamics of Fluid Systems.

Download or read book Enhancing Extraction Processes in the Food Industry written by Nikolai Lebovka and published by CRC Press. This book was released on 2016-04-19 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extraction is an important operation in food engineering, enabling the recovery of valuable soluble components from raw materials. With increasing energy costs and environmental concerns, industry specialists are looking for improved techniques requiring less solvents and energy consumption. Enhancing Extraction Processes in the Food Industry is a

Download or read book Molecular Interactions in Bioseparations written by That T. Ngo and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid advances in molecular biology have accelerated the production of a great number of protein-based therapeutic agents. The major cost in producing these proteins appears to be associated with their purification from the complex mixture of the crude extract. A major challenge to the protein biochemist and the biochemical engineer is the development of rapid, efficient, and cost-effective purification systems. This volume presents state-of-the-art reviews of current methods used in the purifica tion of biological macromolecules that are based on molecular interactions. Thus, the major emphasis is placed on affinity-related techniques. Part I provides a general introduction to affinity chromatography and includes a chapter describing an interesting new technique called "slalom chromatography" for DNA fractionations. Affinity chromatography using molecules of biological origin as the affinity ligand is covered in Part II. Part III describes the use of a special class of biomolecules, antibodies, as affinity ligands. Affinity chromatography with biomimetic ligands is discussed in Part IV. Newer concepts and their applications in bioseparation are presented in Part V. Part VI covers affinity-related techniques such as affinity-based extracorporeal shunts, affinity electrophoresis, affinity precipitation, and affinity extraction. I would like to express my sincere thanks to all the authors, who are recognized experts in their respective fields, for their cooperation and contributions. I thank the editorial staff of Plenum Press for their professionalism, and Mary Phillips Born, Senior Editor, for her encouragement. The support of my family (Ping and Peilin) made it possible to complete editing this book. That T.

Download or read book Interfacial Nanochemistry written by Hitoshi Watarai and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: The history of the liquid-liquid interface on the earth might be as old as that of the liquid. It is plausible that the generation of the primitive cell membrane is responsible for an accidental advent of the oldest liquid interfaces, since various compounds can be concentrated by an adsorption at the interface. The presence of liquid-liquid interface means that real liquids are far from ideal liquids that must be miscible with any kinds of liquids and have no interface. Thus it can be said that the non-ideality of liquids might generate the liquid-liquid interface indeed and that biological systems might be generated from the non-ideal interface. The liquid-liquid interface has been, therefore, studied as a model of biological membrane. From pairing two-phases of gas, liquid and solid, nine different pairs can be obtained, which include three homo-pairs of gas-gas, liquid-liquid and solid-solid pairs. The gas-gas interface, however, is practically no use under the ordinary conditions. Among the interfaces produced by the pairing, the liquid-liquid interface is most slippery and difficult to be studied experimentally in comparison with the gas-liquid and solid-liquid interfaces, as the liquid-liquid interface is flexible, thin and buried between bulk liquid phases. Therefore, in order to study the liquid-liquid interface, the invention of innovative measurement methods has a primary importance.

Download or read book Handbook of Bioseparations written by Satinder Ahuja and published by Elsevier. This book was released on 2000-06-23 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is generally recognized that the commercial success of biotechnology products is highly dependent on the successful development and application of high-powered separation and purification methods. In this practical and authoritative handbook, the separation of proteins, nucleic acids, and oligonucleotides from biological matrices is covered from analytical to process scales. Also included in a chapter on the separation of monoclonal antibodies, which have found numerous uses as therapeutic and diagnostic agents. Analytical techniques include an interesting montage of chromatographic methods, capillary electrophoresis, isoelectric focusing, and mass spectrometry. Among separation and purification methods, liquid-liquid distribution, displacement chromatography, expanded bed adsorption, membrane chromatography, and simulated moving bed chromatography are covered at length. Regulatory and economic considerations are addressed, as are plant and process equipment and engineering process control. A chapter on future developments highlights the application of DNA chip arrays as well as evolving methodologies for a large number of drugs that are under development for treatment of cancer, AIDS, rheumatoid arthritis, and Alzheimer's disease. Handbook of Bioseparations serves as an essential reference and guidebook for separation scientists working in the pharmaceutical and biotechnology industries, academia, and government laboratories. Key Features * Covers bioseparations of proteins, nucleic acids, and monoclonal antibodies * Encompasses both analytical and process-scale methods * Elucidates the importance of engineering process control * Details selection of plant and process equipment * Addresses economic considerations * Discusses future developments

Download or read book The Structure Dynamics and Equilibrium Properties of Colloidal Systems written by D. Bloor and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 869 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Study Institute on Properties of Colloidal Systems, Aberystwyth, Wales, U.K., September 10-23, 1989

Download or read book Surfactants in Chemical Process Engineering written by Wasan and published by CRC Press. This book was released on 1988-05-19 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first reference to link chemical engineering technologies and surfactant science in such breadth of focus, Surfactants in Chemical/Process Engineering features contributions by major authorities in chemical engineering whose applications have opened important new fields for surfactant use. These applications include dispersion science, separation processes, oil recovery, microemulsions, and environmental control. This volume discusses ultrafiltration processes, flotation, metal extractions, and more ... examines surfactants in process streams for such industrial separations as micellar-enhanced ultrafiltration, adsorbent regeneration, micellar extractions, and oil/water demulsification ... describes methodologies for separations of fatty acids, metals, minerals and impurities, solvents, and hydrocarbons for cost-saving industrial and consumer product manufacture ... details techniques for developing and optimizing formulations for superior agricultural plant control or enhancement systems, micro- and macroemulsions, and liquid surfactant membranes ... and looks closely at emulsion polymers in soil stabilizations, protective coatings, sealants, adhesives, textile processing, paper finishing, specialty concretes, and tire manufacture. Book jacket.