Crystallization Kinetic Investigations of Calcium Sulfate Phases in Aqueous CaCl2-HCl Solutions PDF Download
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Author: Thomas Feldmann
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"The kinetics and crystal quality of a novel reactive crystallization system leading to the formation of calcium sulfate phases with simultaneous generation of strong hydrochloric acid (up to 9 M) were investigated. The investigations undertaken in this work relate to a new hydrochloric acid regeneration process currently under industrial development for application in non-ferrous metal hydrometallurgical operations. In particular the thesis is considering the following aspects: (a) the crystal growth kinetics of calcium sulfate [alpha]-hemihydrate (HH); (b) calcium sulfate phase transformation kinetics; (c) impurity effects; and (d) crystal modifier effects on calcium sulfate crystal quality.
Author: Thomas Feldmann
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"The kinetics and crystal quality of a novel reactive crystallization system leading to the formation of calcium sulfate phases with simultaneous generation of strong hydrochloric acid (up to 9 M) were investigated. The investigations undertaken in this work relate to a new hydrochloric acid regeneration process currently under industrial development for application in non-ferrous metal hydrometallurgical operations. In particular the thesis is considering the following aspects: (a) the crystal growth kinetics of calcium sulfate [alpha]-hemihydrate (HH); (b) calcium sulfate phase transformation kinetics; (c) impurity effects; and (d) crystal modifier effects on calcium sulfate crystal quality.
Author: Hojong Kim
Publisher: Springer
ISBN: 3319723502
Category : Technology & Engineering
Languages : en
Pages : 340
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Book Description
This collection presents papers from a symposium on extraction of rare metals as well as rare extraction processing techniques used in metal production. Topics include the extraction and processing of elements such as antimony, arsenic, gold, indium, palladium, platinum, rare earth metals including yttrium and neodymium, titanium, tungsten, and vanadium. Rare processing techniques are covered, including direct extraction processes for rare-earth recovery, biosorption of precious metals, fluorination behavior of uranium and zirconium mixture of fuel debris treatment, and recovery of valuable components of commodity metals such as zinc, nickel, and metals from slag.
Author: F. S. Tsai
Publisher:
ISBN:
Category :
Languages : en
Pages : 155
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Book Description
Author:
Publisher:
ISBN:
Category : Crystallization
Languages : en
Pages : 0
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Author: T Havlik
Publisher: Elsevier
ISBN: 1845694619
Category : Technology & Engineering
Languages : en
Pages : 551
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Book Description
This book is concerned with the theoretical principles of hydrometallurgical processes and engineering aspects. The hydrometallurgical processes of production of copper are discussed and leaching of chalcopyrite as the main sulphide mineral of copper processed in industry is used as an example. The book is suitable as a university textbook for students of metallurgy. - Examines the different techniques involved - Discusses the production of specific metals using hydrometalluric processes - Looks at the future of hydrometallurgy
Author: Z. Amjad
Publisher: Springer Science & Business Media
ISBN: 1489914005
Category : Science
Languages : en
Pages : 356
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Book Description
This book documents the proceedings of the symposium, "Mineral Scale Formation and Inhibition," held at the American Chemical Society Annual Meeting August 21 to 26, 1994, in Washington, D. C. The symposium, sponsored by the Division of Colloid and Surface Chemistry, was held in honor of Professor George H. Nancollas for his pioneering work in the field of crystal growth from solution. A total of 30 papers were presented by a wide spectrum of scientists. This book also includes papers that were not presented but were in the symposium program. The separation of a solid by crystallization is one of the oldest and perhaps the most frequently used operations in chemistry. Because of its widespread applicability, in recent years there has been considerable interest exhibited by academic and industrial scientists in understanding the mechanisms of crystallization of sparingly soluble salts. The salt systems of great interest in industrial water treatment area (i. e. , cooling and boiler) include carbon ates, sulfates, phosphates, and phosphonates of alkaline earth metals. Although not as common as calcium carbonate and calcium sulfate, barium and strontium sulfates have long plagued oil field and gas production operations. The build-up of these sparingly soluble salts on equipment surfaces results in lower heat transfer efficiency, increased corrosion rates, increased pumping costs, etc. In the laundry application, insoluble calcium carbonate tends to accumulate on washed fabrics and washing equipment parts, resulting in undesirable fabric-encrustation or scaling.
Author: Alexander E.S. Van Driessche
Publisher: Springer
ISBN: 9783319456676
Category : Science
Languages : en
Pages : 0
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Book Description
In the last decade, numerous studies have demonstrated the existence of alternative pathways to nucleation and crystallisation that oppose the classical view. Such proposed scenarios include multistage reactions proceeding via various precursor species and/or intermediate phases. The aim of this book is to review and discuss these recent advances in our understanding of the early stages of mineralisation through a series of contributions that address both experimental and theoretical studies about the formation and nature of initial precursor species (e.g., prenucleation clusters, dense liquid phases, amorphous nanoparticles, etc.) as well as their transformations leading to the stable mineral phase. Several chapters are devoted to cutting-edge analytical techniques used for investigating the above processes in situ, in real time and at conditions relevant to both natural and industrial processes. At the end of the book, the editors summarize the key questions that still need to be addressed in order to establish a complete picture of the nucleation and growth processes involved during the formation of minerals
Author:
Publisher:
ISBN:
Category : Geothermal resources
Languages : en
Pages : 636
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Book Description
Author: John H. Montgomery
Publisher: CRC Press
ISBN: 9781420032765
Category : Technology & Engineering
Languages : en
Pages : 1388
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Book Description
The latest edition of the bestselling Groundwater Chemicals Desk Reference has been thoroughly updated and expanded. In addition to information concerning the environmental fate and transport in various media, organic priority pollutants and chemicals commonly found in the workplace and the environment, it includes toxicity information for mammals and aquatic species in a clear, consistent format.
Author: Eldon R. Rene
Publisher: Springer
ISBN: 331958622X
Category : Science
Languages : en
Pages : 292
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Book Description
This book covers the principles, underlying mechanisms, thermodynamic functions, kinetics and modeling aspects of sustainable technologies, particularly from the standpoint of applying physical, chemical and biological processes for the treatment of wastewater polluted with heavy metals. Particular emphasis has been given to technologies that are based on adsorption, electro-coagulation, bio-precipitation, bio-solubilization, phytoremediation and microbial electrolysis. Metal contamination in the environment is one of the persisting global issues. The adverse health effects of heavy metals on human beings and its impact on the environment has been well-documented. Several physico-chemical and biological technologies have been successfully implemented to prevent and control the discharge of industrial heavy metal emissions. On the contrary, metal resource depletion has also accelerated dramatically during the 20th century due to rapid advances in industrial engineering and medical sciences, which requires large amount of raw materials. To meet the global metal demand, in recent years, novel research lines have started to focus on the recovery of metals from metal contaminated waste streams. In order to conflate both metal removal and recovery, new technologies have been successfully tested, both at the lab and pilot-scale. The target audience of this book primarily comprises of research experts, practicing engineers in the field of environmental/chemical technology and graduate students.
