Method For Separating Water Soluble Organics From A Process Stream By Aqueous Biphasic Extraction
DOWNLOAD
Download Method For Separating Water Soluble Organics From A Process Stream By Aqueous Biphasic Extraction PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Method For Separating Water Soluble Organics From A Process Stream By Aqueous Biphasic Extraction book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
A Method For Separating Water Soluble Organics From A Process Stream By Aqueous Biphasic Extraction
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2001
A Method For Separating Water Soluble Organics From A Process Stream By Aqueous Biphasic Extraction written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
The present invention relates to a method for separating water-miscible organic species from a process stream by aqueous biphasic extraction. In particular, the method includes extracting the organic species into a polymer-rich phase of an aqueous biphase system in which the process stream comprises the salt-rich phase, and, next, separating the polymer from the extracted organic species by contacting the loaded, polymer-rich phase with a water-immiscible organic phase. Alternatively, the polymer can be separated from the extracted organic species by raising the temperature of the loaded, polymer-rich phase above the cloud point, such that the polymer and the water-soluble organic species separate into two distinct aqueous phases. In either case, a substantially salt-free, concentrated aqueous solution containing the organic species is recovered.
Method For Separating Water Soluble Organics From A Process Stream By Aqueous Biphasic Extraction
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1999
Method For Separating Water Soluble Organics From A Process Stream By Aqueous Biphasic Extraction written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
A method for separating water-miscible organic species from a process stream by aqueous biphasic extraction is provided. An aqueous biphase system is generated by contacting a process stream comprised of water, salt, and organic species with an aqueous polymer solution. The organic species transfer from the salt-rich phase to the polymer-rich phase, and the phases are separated. Next, the polymer is recovered from the loaded polymer phase by selectively extracting the polymer into an organic phase at an elevated temperature, while the organic species remain in a substantially salt-free aqueous solution. Alternatively, the polymer is recovered from the loaded polymer by a temperature induced phase separation (cloud point extraction), whereby the polymer and the organic species separate into two distinct solutions. The method for separating water-miscible organic species is applicable to the treatment of industrial wastewater streams, including the extraction and recovery of complexed metal ions from salt solutions, organic contaminants from mineral processing streams, and colorants from spent dye baths.
Actinide Recovery Using Aqueous Biphasic Extraction
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1992
Actinide Recovery Using Aqueous Biphasic Extraction written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Aqueous biphasic extraction systems are being developed to treat radioactive wastes. The separation technique involves the selective partitioning of either solutes or colloid-size particles between two scible aqueous phases. Wet grinding of plutonium residues to an average particle size of one micron will be used to liberate the plutonium from the bulk of the particle matrix. The goal is to produce a plutonium concentrate that will integrate with existing and developing chemical recovery processes. Ideally, the process would produce a nonTRU waste stream. Coupling physical beneficiation with chemical processing will result in a substantial reduction in the volume of mixed wastes generated from dissolution recovery processes. As part of this program, we will also explore applications of aqueous biphasic extraction that include the separation and recovery of dissolved species such as metal ions and water-soluble organics. The expertise and data generated in this work will form the basis for developing more cost-effective processes for handling waste streams from environmental restoration and waste management activities within the DOE community. This report summarizes the experimental results obtained during the first year of this effort. Experimental efforts were focused on elucidating the surface and solution chemistry variables which govern partitioning behavior of plutonium and silica in aqueous biphasic extraction systems. Additional efforts were directed toward the development of wet grinding methods for producing ultrafine particles with diameters of one micron or less.
Official Gazette Of The United States Patent And Trademark Office
DOWNLOAD
Author : United States. Patent and Trademark Office
language : en
Publisher:
Release Date : 1999
Official Gazette Of The United States Patent And Trademark Office written by United States. Patent and Trademark Office and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Patents categories.
Liquid Biphasic System
DOWNLOAD
Author : Pau Loke Show
language : en
Publisher: Elsevier
Release Date : 2020-11-28
Liquid Biphasic System written by Pau Loke Show and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-11-28 with Technology & Engineering categories.
Downstream bioprocesses have a significant role to play in the creation of a sustainable bio-based economy, enabling the creation of new products and systems from the more sustainable bioprocessing of natural products. Liquid Biphasic System: Fundamentals, Methods, and Applications in Bioseparation Technology explores in detail the fundamental processes and applications of this new separation system, aiding understanding of the basic principles of the technique and offering constructive criticisms on the latest findings. Including coverage of the background, principles, mechanisms, and applications, Liquid Biphasic System addresses how to adapt the technology for the purification of useful compounds with greater cost efficiency and greener processing. It is essential reading for bioprocess engineers, biochemical engineers, biosystem engineers, chemists and microbiologists working in the fields of bioprocessing. Researchers, scientists, and engineers concerned with the selection and evaluation of alternative bioseparation processes will find the book particularly useful. Provides information and examples of advanced separations in a single source Includes detailed descriptions of novel bioseparation systems Covers the latest technologies related to advanced liquid–liquid separation and their applications in various industries
Development Of Membrane Extraction Systems For Measuring Trace Level Organic Compounds In Water
DOWNLOAD
Author : Xuemei Guo
language : en
Publisher:
Release Date : 1999
Development Of Membrane Extraction Systems For Measuring Trace Level Organic Compounds In Water written by Xuemei Guo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Groundwater categories.
The presence of volatile organic compounds (VOCs) in ground and surface water resources poses a threat to public health. The measurement of these trace level contaminants in water is of significant importance. Conventional methods for analysis of trace volatile organic compounds in water include purge and trap, head space analysis, and solid phase microextraction (SPME). While these are excellent laboratory techniques, none of them can be used for continuous, on-line monitoring of water streams. Membrane separation of organic compounds from water provides an exciting possibility for on-line extraction and analysis. In previous investigations, water continuously flowed on the feed side of the membrane and the analytes were continuously removed by an inert gas stream or a vacuum. The measurement was based on steady state permeation. This approach has several limitations. For example, the steady state can not be reached instantly, resulting in a long analysis time. Another limitation is that this instrument can not be used for analyzing small discrete samples. In this study, a novel approach, referred to as pulse introduction membrane extraction (PIME), is presented. This technique eliminates steady state requirements and can be used for continuous monitoring, as well as for discrete analysis of trace levels of VOCs in water. Water samples are introduced as a pulse into a membrane module. An eluent is used to transport the sample onto the membrane. The permeated organic compounds are extracted by an inert gas, concentrated in a micro-sorbent trap and injected into a GC for analysis. An aqueous boundary layer which forms at the membrane surface due to the poor mixing of water with the membrane appears to be the major resistance to mass transfer for the permeation process. Boundary layer effects were reduced by nitrogen purge of the membrane, and by an alternative membrane module design. A mathematical model which takes into account the aqueous boundary layer effects was developed to describe the nonsteady state, pulse introduction process. A qualitative model of extraction efficiency is also presented here to illustrate the factors that affect analytical sensitivity. The combination of system optimization, nitrogen purge and improved module design results in higher sensitivity and faster response than other methods reported in the technical literature. Detection limits are at ppb levels, precision and extraction efficiency are excellent. As the result of this research, the capability of continuous monitoring of trace levels of organic compounds in water has been demonstrated. The PIME system was compared with previously reported steady state membrane permeation system. The advantages of the PIME system include higher sensitive and faster response and can also be used for discrete sample analysis. Comparison of the PIME with the purge and trap technique, which is currently the most popular method for VOCs analysis, showed that the results are in good agreement. Contaminated ground water samples from the Naval Engineering Research Station were analyzed to demonstrate the practicality of the PIME system. This study was extended to the analysis of sernivolatile organic compounds (SVOCs) in water. Continuous monitoring of SVOCs in water using membrane extraction and on-line HPLC analysis was explored. The system was based on continuous extraction rather than pulse introduction. It demonstrated the capability for enriclunent of SVOCs from water into a solvent. Continuous monitoring of SVOCs was demonstrated at ppb level using HPLC. System parameters which affect the enrichment factors were studied.
Downstream Process Technology A New Horizon In Biotechnology
DOWNLOAD
Author : Krishna Kant Prasad
language : en
Publisher: PHI Learning Pvt. Ltd.
Release Date : 2010-01-30
Downstream Process Technology A New Horizon In Biotechnology written by Krishna Kant Prasad and has been published by PHI Learning Pvt. Ltd. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-01-30 with Mathematics categories.
Today, biochemical process industry demands fast and economic processes for the partitioning and purification of biomolecules that give high yield and high purity of the product. An integral and cost intensive part of these processes is associated with downstream processing for product isolation and purification. The aim of this comprehensive text is to provide an insightful overview of the whole aspects of downstream processing for biochemical product recovery. Intended for undergraduate and postgraduate students of biotechnology and chemical engineering, this self-contained text includes the chapters based on the recent developments in the industry and academics. It covers the importance of the downstream processing in terms of its relevancy to modern days ever-changing consumer needs, process design criteria relevance to set objectives, and physicochemical factors that help to formulate the strategy to develop a configuration among the raw material, methodology and instruments. This overview is followed by different downstream processing steps. The text concludes with the discussion on stabilization of the product to improve the shelf life of the product. Key Features Includes detailed biological, mathematical, chemical and physical aspects of downstream processing. Distinguishes downstream processing from analytical bioseparation. Contains numerous illustrations and solved problems.
Energy Research Abstracts
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1993
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Power resources categories.
Solvent Extraction Principles And Practice Revised And Expanded
DOWNLOAD
Author : Jan Rydberg
language : en
Publisher: CRC Press
Release Date : 2004-03-03
Solvent Extraction Principles And Practice Revised And Expanded written by Jan Rydberg and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-03-03 with Science categories.
A complete and up-to-date presentation of the fundamental theoretical principles and many applications of solvent extraction, this enhanced Solvent Extraction Principles and Practice, Second Edition includes new coverage of the recent developments in solvent extraction processes, the use of solvent extraction in analytical applications and waste re
Ionic Liquid Based Aqueous Biphasic Systems
DOWNLOAD
Author : Mara G. Freire
language : en
Publisher: Springer
Release Date : 2016-10-05
Ionic Liquid Based Aqueous Biphasic Systems written by Mara G. Freire and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-05 with Technology & Engineering categories.
This book offers comprehensive information on the fundamentals and applications of ionic-liquid-based aqueous biphasic systems, which have predominantly (and successfully) been employed as alternative platforms for the extraction, separation and purification of diverse high-value products. The book consists of an initial introduction providing a brief overview, from fundamentals to applications, followed by nine chapters addressing the respective phase diagrams (interpretation and characterization) and remarkable examples of their applications. It also includes two final chapters focusing on recent developments in the search for more environmentally-benign and biocompatible ionic-liquid-based aqueous biphasic systems, and on the progress made to date concerning the recovery, recycling and reuse of the phase-forming components, the goal being the development of cost-effective and sustainable processes. The book offers an interesting and useful guide for a broad readership in the fields of green chemistry, biotechnology, chemical engineering, and biochemistry, among others. Mara G. Freire is a Coordinator Researcher at CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Portugal.