Solvent Extraction and Liquid Membranes


Book Description

The applications of solvent extraction (SX) and liquid membranes (LM) span chemistry, metallurgy, hydrometallurgy, chemical/mineral processing, and waste treatment-making it difficult to find a single resource that encompasses fundamentals as well as advanced applications. Solvent Extraction and Liquid Membranes: Fundamentals and Applicat




Ion Exchange and Solvent Extraction


Book Description

"Contains a complete manual with procedures for the implementation and scaling-up of industrial extraction processes. Discusses computer-aided molecular design. Includes examples of interactive, combinatorial, construct-and-test, and mathematical programming."




21st Century Prometheus


Book Description

This book describes the evolving CBRN risk landscape and highlights advances in the “core” CBRN technologies, including when combined with (improvised) explosive devices (CBRNe threats). It analyses how associated technologies create new safety and security risks, challenging certain assumptions that underlie current control regimes. The book also shows how technologies can be enablers for more effective strategies to mitigate these risks. 21st-century safety and security risks emanating from chemical, biological, radiological and nuclear materials – whether resulting from natural events, accidents or malevolent use - are increasingly shaped by technologies that enable their development, production or use in ways that differ from the past. Artificial intelligence, the use of cyberspace, the revolution in the life sciences, new manufacturing methods, new platforms and equipment for agent delivery, hypersonic weapons systems, information tools utilised in hybrid warfare – these and other technologies are reshaping the global security environment and CBRN landscape. They are leading to a growing potential for highly targeted violence, and they can lead to greater instability and vulnerability worldwide. At the same time, technology offers solutions to manage CBRN risks. Examples are faster detection, more accurate characterisation of the nature and origin of CBRN agents, new forensic investigation methods, or new medical treatments for victims of CBRN incidents. New educational concepts help to foster a culture of responsibility in science and technology and strengthen governance. New training methods help develop practical skills to manage CBRN risks more effectively. The book concludes that there is a growing need for a holistic framework towards CBRN risk mitigation. Traditional arms control mechanisms such as global, regional or bilateral treaties and export controls are still needed, as they provide a necessary legal and institutional framework. But laws and technology denial alone will not suffice, and institutional mechanisms can at times be weak. Given the pace of technological progress and the diffusion of critical knowledge, tools and materials, policymakers must accept that CBRN risks cannot be eliminated altogether. Instead, society has to learn to manage these risks and develop resilience against them. This requires a “softer”, broadly based multi-stakeholder approach involving governments, industry, the research and development communities, educators, and civil society. Furthermore, educating policymakers that cutting-edge technologies may seriously affect global strategic stability could create incentives for developing a more creative and contemporary arms control strategy that fosters cooperation rather than incremental polarisation.




Mineral Processing on the Verge of the 21st Century


Book Description

This collection of papers covers many topics in the area of mineral processing, such as: physical enrichment processing; fine particle processing; flotation fundamentals and technology; industrial minerals processing; and waste treatment and utilization.




Mineral Processing on the Verge of the 21st Century


Book Description

This collection of papers covers many topics in the area of mineral processing, such as: physical enrichment processing; fine particle processing; flotation fundamentals and technology; industrial minerals processing; and waste treatment and utilization.




Ion Exchange and Solvent Extraction


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 increasingly sophisticated, leading to a greater understanding of what we now recognize as SC phenomena in SX. Volume 21, Supramolecular Aspects of Solvent Extraction identifies how supramolecular behavior occurs and is studied in the context of SX and how SC is influencing the direction of SX. With contributions by internationally recognized specialists from different fields, this volume examines how principles of SC are being used in advancing the design of new highly selective SX systems and for understanding aggregation phenomena in SX systems. The book begins with a discussion of the nature and definition of SC and its general use in the design of novel SX reagents. Chapter 2 expands the subject of ion-pair recognition to introduce outer-sphere recognition of metal complexes. Chapter 3 reviews the literature on calixarenes as extraction reagents for metal ions. Chapter 4 extends the utility of this chemistry, describing the use of calixarenes for the extraction of biomolecules. Chapter 5 examines the liquid–liquid interface as an expression of supramolecular phenomena in SX, reviewing interfacial aggregation in model two-phase systems and metal extraction systems. The final chapter explores the problem of aggregation in SX, the historical attempts to understand it, and recent progress that has been made in addressing the issue.




Solvent Extraction


Book Description

The main challenge in modern solvent extraction separation is that most techniques are mainly empirical, specific and particular for narrow fields of practice and require a large degree of experimentation. This concise and modern book provides a complete overview of both solvent extraction separation techniques and the novel and unified competitive complexation/solvation theory. This novel and unified technique presented in the book provides a key for a preliminary quantitative prediction of suitable extraction systems without experimentation, thus saving researchers time and resources. Analyzes and compares both classical and new competitive models and techniques Offers a novel and unified competitive complexation / solvation theory that permits researchers to standardize some parameters, which decreases the need for experimentation at R&D Presents examples of applications in multiple disciplines such as chemical, biochemical, radiochemical, pharmaceutical and analytical separation Written by an outstanding scientist who is prolific in the field of separation science




Dechema Monographien Bd 136 Transportmechanisms Across Fluid Interfaces


Book Description

The separation operations between two fluid phases are predominantly based on the mass transfer between individual phases across a phase interphase. The investigation of the actual transport across the interphase was the topic of a research programme, result in this work -the most profund publication on the topic. Here, scientists working in different subject areas (physics, physical chemistry, technical chemistry, chemocal engineering and thermodynamics) present their results in this exciting field.




Rodale's 21st-Century Herbal


Book Description

It turns out that Mother Nature is a brilliant chemist. Our ancestors have used indigenous herbs in daily life for thousands of years due to these plants' ability to heal and promote good health. Now modern science has identified the compounds that give herbs their medicinal qualities, scent, and flavor. The extraordinary diversity of herbal plants has the potential to improve our health and well-being, and we are wholeheartedly incorporating herbs, both fresh and dried, into our lifestyles—for well-being, healing, gardening, beauty, ceremony, and a richer, fuller life. Presented in three parts, Rodale's 21st-Century Herbal first explores the historical relationship between people and herbal plants and how it has evolved over time. In the second part, readers will delve into an A-to-Z encyclopedia of 180 of the most useful herbs from around the globe, not only familiar herbs like bilberry and nasturtium, but also cutting-edge herbs from other cultures, like red bush tea and maca, that are now available in the West. The final section highlights how herbs create a "fuller" life and features herbal cooking techniques, ways to use herbs for beauty and the bath, ideas for daily herbal use (such as green cleaning, fragrances, decor, smudging, and dyeing), gardening and growing how-tos (with illustrated garden designs), and advice for holistic herbal pet care.




Green Extraction of Natural Products


Book Description

Extraction processes are essential steps in numerous industrial applications from perfume over pharmaceutical to fine chemical industry. Nowadays, there are three key aspects in industrial extraction processes: economy and quality, as well as environmental considerations. This book presents a complete picture of current knowledge on green extraction in terms of innovative processes, original methods, alternative solvents and safe products, and provides the necessary theoretical background as well as industrial application examples and environmental impacts. Each chapter is written by experts in the field and the strong focus on green chemistry throughout the book makes this book a unique reference source. This book is intended to be a first step towards a future cooperation in a new extraction of natural products, built to improve both fundamental and green parameters of the techniques and to increase the amount of extracts obtained from renewable resources with a minimum consumption of energy and solvents, and the maximum safety for operators and the environment.