Rare Metal Extraction by Chemical Engineering Techniques

Rare Metal Extraction by Chemical Engineering Techniques
Author: W. D. Jamrack
Publisher: Elsevier
Total Pages: 399
Release: 2014-07-15
Genre: Science
ISBN: 1483180565

Rare Metal Extraction by Chemical Engineering Techniques describes the use of chemical engineering techniques in the extraction and purification of rare metals such as uranium, thorium, and zirconium as well as hafnium, titanium, beryllium, and vanadium. The various chemical extraction stages from ore to metal are discussed. Comprised of nine chapters, this book begins with an examination of ore breakdown processes including dilute acid leaching and the breakdown of concentrated acids, alkalis, and fluorides as well as chlorination. The reader is then introduced to ion-exchange purification; solvent extraction; and dryway conversion processes. Subsequent chapters focus on metal production by high-temperature reduction techniques; molten salt electrolytic processes; and iodide decomposition processes. The final chapter includes a selection of complete flowsheets for the extraction and purification rare metals from ores. This monograph will be of value to metallurgists, chemical engineers, chemists, and others who are interested in the extraction of rare metals.

Rare Earth Metals and Minerals Industries

Rare Earth Metals and Minerals Industries
Author: Yellapu V Murty
Publisher: Springer Nature
Total Pages: 500
Release: 2024-01-29
Genre: Technology & Engineering
ISBN: 3031318676

This book presents the current status and future prospects of rare earth elements with respect to a multitude of factors, including resource availability, production, and applications. Among the topics covered are the extraction of raw materials, alloying and compound production, applications, resource conservation through recycling, regulatory issues, and potential new resource streams. The chapters are authored by well-known technical experts in their fields, with decades of research, industrial, and governmental policy experience. The book is expected to serve as the first single source reference on rare earth minerals and metals aimed at students, scientists, technologists, government legislators, regulatory agencies, investors, and business leaders. It provides in-depth examination of the importance of rare earth elements to the global economy and their use in technological innovation, including energy, power, transportation, medicine, electronics, and chemical/petroleum industries.

Handbook on Rare Earth Metals and Alloys (Properties, Extraction, Preparation and Applications)

Handbook on Rare Earth Metals and Alloys (Properties, Extraction, Preparation and Applications)
Author: NPCS Board of Consultants & Engineers
Publisher: ASIA PACIFIC BUSINESS PRESS Inc.
Total Pages: 557
Release: 2009-04-01
Genre: Science
ISBN: 8178331209

Rare earths are essential constituents of more than 100 mineral species and present in many more through substitution. They have a marked geochemical affinity for calcium, titanium, niobium, zirconium, fluoride, phosphate and carbonate ions. Industrially important minerals, which are utilized at present for rare earths production, are essentially three, namely monazite, bastnasite and xenotime. In modern time techniques for exploration of rare earths and yttrium minerals include geologic identification of environments of deposition and surface as well as airborne reconnaissance with magnetometric and radiometric equipment. There are numerous applications of rare earths such as in glass making industry, cracking catalysts, electronic and optoelectronic devices, medical technology, nuclear technology, agriculture, plastic industry etc. Lot of metals and alloys called rare earth are lying in the earth which required to be processed. Some of the important elements extracted from rare earths are uranium, lithium, beryllium, selenium, platinum metals, tantalum, silicon, molybdenum, manganese, chromium, cadmium, titanium, tungsten, zirconium etc. There are different methods involved in production of metals and non metals from rare earths for example; separation, primary crushing, secondary crushing, wet grinding, dry grinding etc. The rare earths are silver, silverymwhite, or gray metals; they have a high luster, but tarnish readily in air, have high electrical conductivity. The rare earths share many common properties this makes them difficult to separate or even distinguish from each other. There are very small differences in solubility and complex formation between the rare earths. The rare earth metals naturally occur together in minerals. Rare earths are found with non metals, usually in the 3+ oxidation state. At present all the rare earth resources in India are in the form of placer monazite deposits, which also carry other industrially important minerals like ilmenite, rutile, zircon, sillimanite and garnet. Some of the fundamentals of the book are commercially important rare earth minerals, exploration for rare earth resources, rare earth resources of the world, some rare earth minerals and their approximate compositions, rare earths in cracking catalysts, rare earth based phosphors, interdependence of applications and production of rare earths, uranium alloys, conversion of ores to lithium chemicals, characterization and analysis of very pure silicon, derivation of molybdenum metal, electoplating and chromizing, electrolytic production of titanium, heat treatment of titanium alloys, tensile properties of alloys etc. The book covers occurrence of rare earth, resources of the world, production of lithium metals, compounds derived from the metals, chemical properties of beryllium, uses of selenium, derivation of molybdenum metals, ore concentration and treatment and many more. This is a unique book of its kind, which will be a great asset for scientists, researchers, technocrats and entrepreneurs. 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Hazard Assessment of Chemicals

Hazard Assessment of Chemicals
Author: Jitendra Saxena
Publisher: Elsevier
Total Pages: 474
Release: 2012-12-02
Genre: Technology & Engineering
ISBN: 0323149057

Hazard Assessment of Chemicals: Current Developments, Volume 1 is a comprehensive and authoritative account of major developments in hazard assessment of chemicals. In addition to subject reviews, this volume contains case histories of topical chemicals and/or chemical classes in order to show examples of the applications of available methods and approaches for evaluating chemicals. Primary and secondary sources of information on chemicals are considered, along with the environmental and health hazards associated with chemicals. Comprised of 10 chapters, this volume begins with an assessment of information sources on toxic substances, followed by a discussion on pre-concentration of trace metals from aquatic environmental samples. Subsequent chapters focus on the reproductive toxicology of aquatic contaminants; partition coefficient and water solubility in environmental chemistry; in vitro metabolism and activation of chemical carcinogens; and modeling of toxic spills into waterways. Estimation of exposure to hazardous chemicals is also described, along with structure-activity relationships in hazard assessment. The final chapter presents a case study of azaarenes, with emphasis on their sources, distribution, environmental impact, and health effects. This book will be of interest to toxicologists, chemists, and environmental and public health officials.

Electrodeposition of Alloys

Electrodeposition of Alloys
Author: Abner Brenner
Publisher: Elsevier
Total Pages: 735
Release: 2013-10-22
Genre: Technology & Engineering
ISBN: 1483223116

Electrodeposition of Alloys: Principles and Practice, Volume I covers the general and theoretical aspects of the electrodeposition of alloy containing silver and/or copper. This book is organized into three parts encompassing 21 chapters. The first part considers first the history of electrodeposition, the applications of electrodeposited alloys, and the practical considerations involved in electrodeposition. This part also deals with the effect of operating variables on composition of electrodeposited alloys, and the physico-chemical properties of the alloy. The second part focuses on the theoretical aspects of alloy electrodeposition. This part includes discussions on the role of cathode diffusion layer, the effects of complexing agents, and the concept of alloy plating. The third part discusses the practical aspects of the electrodeposition of alloys, focusing primarily on the electrodeposition of alloys from aqueous solutions. This part examines first brass and bronze plating, followed by the electrodeposition of copper-tin, silver, and iron containing alloys. This book is directed toward electrochemists and researchers.