Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
United States Patent : US4664700 : Selective Extraction of Metal Ions with Polymeric Extractions by Ion Exchange/redox
Author: Ion Exchange and Solvent Extraction
Author: Yitzhak MarcusPublisher: CRC Press
ISBN: 0824759885
Category : Science
Languages : en
Pages : 240
Book Description
Volume 17 in the Ion Exchange and Solvent Extraction series represents the vanguard of research on solvent extraction. It covers the principles of electrolyte extraction and other subjects of increasing interest to the field. This volume begins with pharmaceutical applications of supercritical fluid solvents, particularly supercritical carbon dioxide. It also contains chapters on liquid ion exchangers and relevant experiment protocols, SCF applications in drug formulation and pollution reduction, exploiting SCF as reaction media, applications of metal bis(dicarbollide) in analytical chemistry and radioactive waste treatment, and synergistic extraction of metal ions. Volume 17 discusses the ion exchange isothermal supersaturation technique, metal separation via pH-induced parametric pumping, modeling of ion exchange kinetics for ultrapure water, and the engineering of activated carbons and carbonaceous materials for removal of metal ions and organic micropollutants in water. Volume 17 cover topics that include supercritical fluid applications, applications of metal bis(dicarbollide), and synergistic extraction of metal ions.
Ion Exchange and Solvent Extraction
Author: Arup K. SenguptaPublisher: CRC Press
ISBN: 1315350637
Category : Science
Languages : en
Pages : 243
Book Description
Since the Second World War, the field of ion exchange has taken a dominant role in offering solutions to many problems in the developed and developing world. It has evolved to a wide array of applications, including mining, microelectronics, drug delivery and detection, food, fertilizers, chemical cleaning, catalysis, bioseparation, water management, environmental research and practices, and energy. The six chapters in this book represent diverse contributions from researchers around the globe who are making noticeable strides in the field in currently important areas: Brackish water desalination Removing boron from water Sustainable approaches for synthesizing commercially important epoxide building blocks Solid-phase heavy-metal separation Separating concentrated ion mixtures in sorption columns Sensing toxic metals Ion Exchange and Solvent Extraction: A Series of Advances, Volume 22 provides a focused review of new materials and new processes that have developed and are rapidly growing. It describes cutting-edge research and practices in the use of ion exchange for building a cleaner, sustainable world and provides thoughtful insights on what ion exchange may do for us in the future.
Ion Exchange and Solvent Extraction
Author: Arup K. SenGuptaPublisher: CRC Press
ISBN: 9780824705084
Category : Science
Languages : en
Pages : 384
Book Description
This text introduces a special class of polymeric ligand exchanger (PLE) with high affinities for anionic ligands. Volume 14 discusses the potential and advantages of micro- and nanofiltration membrane processes for removal of metals; details prevailing equilibrium relationships and supporting experimental data for systems where leaching and ion exchange take place simultaneously; covers cases of uranium cation and gold cyanide anion bisorption and modelling of engineered systems.
United States Patent : US4252644 : High Performance Ion Exchange Composition and the Removal and Separation of Ions Therewith
Author: Ion Exchange and Solvent Extraction
Author: Arup K. SenGuptaPublisher: CRC Press
ISBN: 9780203913604
Category : Science
Languages : en
Pages : 402
Book Description
Reflecting the sustained and diverse experimental momentum in the field of ion exchange, Volume 16 summarizes revolutionary advances on par with the consistently high-level research related by this series. This text discusses the kinetics, theoretical models, experimental results/supporting data, and applications for isothermal supersaturation, met
Ion Exchange and Solvent Extraction
Author: Bruce A MoyerPublisher: CRC Press
ISBN: 1482204363
Category : Science
Languages : en
Pages : 290
Book Description
Over the past several decades, the theme of supramolecular chemistry (SC) has permeated nearly all aspects of chemical endeavor. Not surprisingly, it has also pervaded the field of solvent extraction (SX), inspiring the framework for this volume of Ion Exchange and Solvent Extraction. In addition, tools for studying aggregation have grown increasin
United States Patent : US3558288 : Extraction of Metal Ions from Acidic Aqueous Solution Using an Amine and a Carboxylic Acid
Author: Ion Exchange and Solvent Extraction
Author: Arup K. SenGuptaPublisher: CRC Press
ISBN: 1420007416
Category : Science
Languages : en
Pages : 433
Book Description
Alternating the focus of the series each year, the new volume in the Ion Exchange and Solvent Extraction series represents the vanguard of research in ion exchange. Ion Exchange and Solvent Extraction: A Series of Advances, Volume 18 reflects the remarkable breadth of applications inspiring the latest advances, featuring carefully selected contribu
Exploring an Organometallic Redox Complex for the Remediation and Reclamation of Ionic Contaminants
Author: Christopher BeckerPublisher:
ISBN:
Category : Amines
Languages : en
Pages : 144
Book Description
Ion exchange for the removal of ionic contaminants is typically considered a mature technology. However, recovery of extracted contaminants in a minimal volume of secondary waste and regeneration of ion exchange materials for use in subsequent extraction cycles continue to represent significant challenges for the separation chemist. Substantial progress in overcoming these barriers has been made by employing redox-switchable organometallic complexes for the extraction and recovery of ionic contaminants. As compared with traditional ion exchange, this approach offers an alternative redox-based stripping mechanism and affords quantitative recovery of a target contaminant in a minimal volume of secondary waste. In contrast to previous redox extraction and recovery processes (R2ER) which focus on selectivity and design of an organometallic extractant, we have developed a novel redox process with potential for adaptation to any existing ion exchanger. The lipophilic metal complex Fe([eta]5-C5H5)([eta]5-(3)-1,2-C2B9H9(n-C12H25)2) has been used in combination with tetra-n-heptylammonium salts to demonstrate an improved R2ER paradigm for aqueous anions. Liquid-liquid extraction of a generic contaminant was shown to follow a traditional ion-exchange equilibrium. Subsequent recovery of the extracted contaminant as a compact solid was promoted by treatment of the water-immiscible phase with zinc powder, and the spent solvent was regenerated by treatment with an aqueous oxidant. Using this method, 100 L of industrial waste simulant can be reduced to 25 mL of secondary waste in a single reductive step. As compared to previously reported R2ER processes for anions, the new process alleviates potential stability concerns related to the presence of charge dense anions and enables efficient regeneration of a variety of counter ions in tetra-n-heptylammonium ion pairs, including NO3, Br, Cl. Repeatable extraction/regeneration cycles demonstrated no loss in extraction efficiency. Extracted contaminants were recovered in yields ranging from 97% to 100%. R2ER regeneration of OH is also discussed. Liquid-liquid extraction studies demonstrating the feasibility of the approach and extension of this chemistry to a polymer-supported format is presented.