Precious Metals

A view of gold and other precious metal extractions from a new and wider angle, taking in both the earth and the metallurgical sciences. To name but a small number of the topics covered: - Occurrences of gold and silver minerals in their ores - Photomicrographs of refractory and amenable minerals/ores - The use of irregular gold and silver distributions for efficient planning of the extraction process - Microanalytical techniques - Descriptions of uranium and many base metals for comparison. Written with a broad audience in mind, from the manager of operations to the metallurgist, for the field geologist or other earth scientist, and for the professor and student alike.

The resources race is on. Powering our digital lives and green technologies are some of the Earth's most precious metals -- but they are running out. And what will happen when they do? The green-tech revolution has been lauded as the silver bullet to a new world. One that is at last free of oil, pollution, shortages, and cross-border tensions. Now updated after several years of research across a dozen countries, this book cuts across conventional green thinking to probe the hidden, dark side of green technology. By breaking free of fossil fuels, we are in fact setting ourselves up for a new dependence -- on rare metals such as cobalt, gold, and palladium. They are essential to electric vehicles, wind turbines, solar panels, our smartphones, computers, tablets, and other everyday connected objects. China has captured the lion's share of the rare metals industry, but consumers know very little about how they are mined and traded, or their environmental, economic, and geopolitical costs. The Rare Metals Waris a vital exposé of the ticking time-bomb that lies beneath our new technological order. It uncovers the reality of our lavish and ambitious environmental quest that involves risks as formidable as those it seeks to resolve.

The rapid revolution in modern industry has led to a significant increase in waste at the end of the product lifecycle. It is essential to close the loop, secure resources, and join up the circular economy. This book provides a detailed review of extraction techniques for urban mining of precious metals including gold, silver, and the platinum group. The merits and demerits of various extraction methods are highlighted, with possible suggestions for improvements. The feasibility of hybrid extraction techniques, as well as the sustainability and environmental impact of every process, is explored. Offers a comprehensive review of different techniques used in recycling technology for urban mining of precious metals Describes the concept of urban mining and its correlation with circular economy Discusses feasibility of precious metal extraction and urban mines scope and their potential Explains the subject in-context of sustainability while describing chemistry fundamentals and industrial practices Provides technical flow sheets for urban mining of precious metals with diversity of lixiviant This book is aimed at graduate students and researchers in extractive metallurgy, hydrometallurgy, chemical engineering, chemistry, and environmental engineering.

Written for chemists in industry and academia, this ready reference and handbook summarizes recent progress in the development of new catalysts that do not require precious metals. The research thus presented points the way to how new catalysts may ultimately supplant the use of precious metals in some types of reactions, while highlighting the remaining challenges. An essential copanion for organic and catalytic chemists, as well as those working with/on organometallics and graduate students. From the contents: * Catalysis Involving the H' Transfer Reactions of First-Row Transition Metals * Catalytic Reduction of Dinitrogen to Ammonia by Molybdenum Complexes * Molybdenum and Tungsten Catalysts for Hydrogenation, Hydrosilylation and Hydrolysis * Iron in Catalytic Alkene and Carbonyl Hydrogenation Reactions * Olefin Oligomerizations and Polymerizations Catalyzed by Iron and Cobalt Complexes * Cobalt and Nickel Catalyzed Reactions Involving C-H and C-N Activation Reactions * Development of Molecular Electrocatalysts for H2 Oxidation and Production Based on Inexpensive Metals * Nickel-Catalyzed Reductinve Couplings and Cyclizations * Copper-Catalyzed Ligand Promoted Ullmann-Type Coupling Reactions * Copper-Catalyzed Azide-Alkyne Cycloaddition * "Frustrated Lewis Pairs": A Metal-Free Strategy for Hydrogenation Catalysis

Precious Metals 1981 presents the significant role of precious noble metals in various aspects of human life. This book discusses the wide array of uses of precious metals from dental fillings to the manufacturing of air conditioners. Organized into nine parts encompassing 48 chapters, this book begins with an overview of the chemical reducing capability of sodium borohydride for various organic heavy metal applications. This text then examines the general plant operations comprising of heap leaching methods utilized for the recovery of finely dispersed particles of gold and silver. Other chapters consider the refining characteristics of gold alloys containing impurities. This book discusses as well the fundamental principles of major conventional bonding methods used to produce metal clad materials used in jewelry and electrical contact applications. The final chapter deals with the precious and non-precious alloy systems used in Dentistry. This book is a valuable resource for engineers, jewelers, and goldsmiths.

In recent years, metals have been among the safest and most lucrative investments around, but they are not entirely risk free. Before you begin investing or trading in metals, you need authoritative information and proven investment strategies. You need Precious Metal Investing For Dummies. This straightforward guide eases you into the precious metals market with sound advice on trading and owning these profitable investments, including gold, silver, platinum, and uranium, as well as high-demand base metals such as zinc and copper. You’ll learn how to research their market performance and choose among an array of proven trading plans and strategies. Plus, you’ll get savvy advice on how to choose a broker, buy stocks and futures that involve metals, maximize your investment return, and minimize your risk. Discover how to: Evaluate the different metals Add metals to your portfolio Decide whether you’re an investor or a trader Identify your metal-investment goals Weigh the risks and benefits of metals investing Buy physical metals Use technical analysis to evaluate opportunities Make long-term investments in precious metals Diversify your metals investments Analyze base-metals companies Purchase numismatic coins Add metals to your mutual fund or ETF portfolio Understand how politics effects metals prices Metals can be an important and valuable addition to any investment portfolio or retirement plan. Make the most out of your investment with Precious Metal Investing For Dummies.

Precious metals and semi-precious metals are used for an increasing number of medical applications due to the properties of these metals and their alloys. Precious Metals for Biomedical Applications reviews the properties of precious metals and their resulting applications in medicine. Part one outlines the fundamentals of precious metals for biomedical applications, discussing their useful properties, such as biocompatibility and corrosion resistance. Part two goes on to provide an overview of the applications of precious metals in biomedicine, including dental, therapeutic, tissue engineering, and bioimaging applications. It discusses the advantages of the structure and properties of precious metals for these applications. Precious Metals for Biomedical Applications is a key reference for material scientists and academics concerned with the properties and uses of these metals. Provides a useful review of this group of materials’ unique properties and applications Examines the fundamentals of precious metals for biomedical applications, before looking at a wide range of applications of precious metals in medicine

The future of the precious metals is shiny and resistant. Although expensive and potentially replaceable by transition metal catalysts, precious metal implementation in research and industry shows potential. These metals catalyze oxidation and hydrogenation due to their dissociative behavior toward hydrogen and oxygen, dehydrogenation, isomerization, and aromatization, etc. The precious metal catalysts, especially platinum-based catalysts, are involved in a variety of industrial processes. Examples include Pt–Rh gauze for nitric acid production, the Pt/Al2O3 catalyst for cyclohexane and propylene production, and Pd/Al2O3 catalysts for petrochemical hydropurification reactions, etc. A quick search of the number of published articles in the last five years containing a combination of corresponding “metals” (Pt, Pd, Ru, Rh and Au) and “catalysts” as keywords indicates the importance of the Pt catalysts, but also the continuous increase in the contribution of Pd and Au. This Special Issue reveals the importance of precious metals in catalysis and focuses on mono- and bi-metallic formulations of any supported precious metals and their promotional catalytic effect of other transition metals. The application of precious metals in diverse reactions, either homogeneous or heterogeneous, and studies of the preparation, characterization, and applications of the supported precious metal catalysts, are presented.