organometallic modeling of the hydrodesulfurization and hydrodenitrogenation reactions catalysis by metal complexes

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Organometallic Modeling Of The Hydrodesulfurization And Hydrodenitrogenation Reactions

Author : Robert A. Sánchez-Delgado
ISBN : 9780306476198
Genre : Science
File Size : 82. 55 MB
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The fields of hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) continue to attract the attention of researchers in the various disciplines connected to these fascinating problems that represent two of the key outstanding chemical challenges for the petroleum refining industry in view of their very strong environmental and commercial implications. One area that has flourished impressively over the last 15 years is the organometallic chemistry of thiophenes and other related sulfur-containing molecules. This has become a powerful method for modeling numerous surface species and reactions implicated in HDS schemes, and nowadays it represents an attractive complement to the standard procedures of surface chemistry and heterogeneous catalysis, for understanding the complex reaction mechanisms involved in this process. Similar developments have begun to appear in connection with HDN mechanisms, although in a much more modest scale and depth. Some years ago when, encouraged by Prof. B. R. James, this book was planned, several excellent reviews and monographs treating different aspects of HDS were already available including some on the subject of organometallic models. However, it seemed appropriate to try to summarize the most striking features of this chemistry in an updated and systematic way, and inasmuch as possible in connection with the common knowledge and beliefs of the mechanisms of heterogeneous HDS catalysis. Hopefully, this attempt to build some conceptual bridges between these two traditionally separated areas of chemistry has met with some success.

Advances In Catalytic Activation Of Dioxygen By Metal Complexes

Author : László I. Simándi
ISBN : 9780306478161
Genre : Science
File Size : 66. 21 MB
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The subject of dioxygen activation and homogeneous catalytic oxidation by metal complexes has been in the focus of attention over the last 20 years. The widespread interest is illustrated by its recurring presence among the sessions and subject areas of important international conferences on various aspects of bioinorganic and coordination chemistry as well as catalysis. The most prominent examples are ICCC, ICBIC, EUROBIC, ISHC, and of course the ADHOC series of meetings focusing on the subject itself. Similarly, the number of original and review papers devoted to various aspects of dioxygen activation are on the rise. This trend is due obviously to the relevance of catalytic oxidation to biological processes such as dioxygen transport, and the action of oxygenase and oxidase enzymes related to metabolism. The structural and functional modeling of metalloenzymes, particularly of those containing iron and copper, by means of low-molecular complexes of iron, copper, ruthenium, cobalt, manganese, etc., have provided a wealth of indirect information helping to understand how the active centers of metalloenzymes may operate. The knowledge gained from the study of metalloenzyme models is also applicable in the design of transition metal complexes as catalytsts for specific reactions. This approach has come to be known as biomimetic or bioinspired catalysis and continues to be a fruitful and expanding area of research.

Heterocycles From Transition Metal Catalysis

Author : András Kotschy
ISBN : 9781402036927
Genre : Science
File Size : 82. 23 MB
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"Heterocycles from Transition Metal Catalysis: Formation and Functionalization" provides a concise summary of the prominent role of late transition metal (palladium, nickel, copper) catalysed processes in the synthesis and functionalization of heterocyclic systems. It gives an introduction to catalytic transformations, an overview of the most important reaction types, and presents synthetically useful catalytic processes classified by the target system and the type of transformation. The book provides a representative selection of transition metal catalysed reactions transformations that are relevant in heterocyclic chemistry. In this way, the authors present a useful resource for members of the academic community looking for a textbook as well as industrial chemists in search of a reference book. This book will be an invaluable resource for synthetic chemists, medicinal chemists, and those more generally interested in applied catalysis.

Catalyst Separation Recovery And Recycling

Author : David J. Cole-Hamilton
ISBN : 9781402040870
Genre : Science
File Size : 20. 13 MB
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This book looks at new ways of tackling the problem of separating reaction products from homogeneous catalytic solutions. The new processes involve low leaching supported catalysts, soluble supports such as polymers and dendrimers and unusual solvents such as water, fluorinated organics, ionic liquids and supercritical fluids. The advantages of the different possibilities are discussed alongside suggestions for further research that will be required for commercialisation. Unlike other books, in addition to the chemistry involved, the book looks at the process design that would be required to bring the new approaches to fruition. Comparisons are given with existing processes that have already been successfully applied and examples are given where these approaches are not suitable. The book includes: - New processes for the separation of products from solutions containing homogeneous catalysts - Catalysts on insoluble or soluble supports – fixed bed catalysts - continuous flow or ultrafiltration - Biphasic systems: water - organic, fluorous - organic, ionic liquid – organic, supercritical fluids (monophasic or biphasic with water, organic or ionic liquid) - Comparisons with current processes involving atmospheric or low temperature distillation - Consideration of Chemistry and Process Design - Advantages and disadvantages of each process exposed - Consideration of what else is need for commercialisation

Computational Modeling Of Homogeneous Catalysis

Author : Feliu Maseras
ISBN : 9780306477188
Genre : Science
File Size : 61. 16 MB
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Directory Of Graduate Research

Author : American Chemical Society. Committee on Professional Training
ISBN : UCSD:31822036045805
Genre : Biochemistry
File Size : 29. 20 MB
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Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.

Transition Metal Sulphides

Author : Th. Weber
ISBN : 9789401735773
Genre : Science
File Size : 34. 66 MB
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Hydrotreating catalysis with transition metal sulphides is one of the most important areas of industrial heterogeneous catalysis. The present book deals with the chemical and catalytic aspects of transition metal sulphides, focusing on their use in hydrotreating catalysis. The book¿s 12 chapters present reviews of solid-state, coordination and organometallic chemistry, surface science and spectroscopic studies, quantum chemical calculations, catalytic studies with model and real catalysts, as well as refinery processes. A presentation of state-of-the-art background to pertinent work in the field. Can be used as an introduction to the chemical and catalytic properties of transition metal sulphides as well as an advanced level reference.

Encyclopedia Of Inorganic Chemistry

Author : R. Bruce King
ISBN : STANFORD:36105128373573
Genre : Science
File Size : 44. 4 MB
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The ultimate resource on inorganic chemistry – new and completely revised, 10 years after publication of the First Edition The first edition of the Encyclopedia of Inorganic Chemistry treated the elements of the periodic system in alphabetical order, with multiple entries for key elements. The articles from the First Edition were written more than 10 years ago and all areas of inorganic chemistry have seen such a vigorous development that it was necessary to update most articles and to add a considerable number of new articles. The result of this major work is the proud Encylopedia of Inorganic Chemistry Second Edition (EIC-2). New – now includes colour 30% growth on previous edition – now 6,640 pages, published in 10 volumes EIC-2 continues to present articles in alphabetical order, but the content has been slightly reorganized to the following subject areas: Main Group Elements; Transition Metals and Coordination Chemistry; Organometallic Chemistry; Bioinorganic Chemistry; Solid State, Materials, Nanomaterials and Catalysis; and General Inorganic Chemistry, Theoretical and Computational Methods.

Comprehensive Organometallic Chemistry Iii

Author : D. M. P. Mingos
ISBN : 008044590X
Genre : Science
File Size : 33. 63 MB
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Hydrodesulfurization And Hydrodenitrogenation

Author : Toshiaki Kabe
ISBN : STANFORD:36105110179160
Genre : Technology & Engineering
File Size : 59. 14 MB
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