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Author: Qiang Miao Publisher: Cuvillier Verlag ISBN: 3736919018 Category : Science Languages : en Pages : 165
Book Description
The catalytic cooligomerizations of olefins are among the most important C-C coupling reactions. Many transition metals have been used as catalysts for this kind of reactions. They are rhodium, ruthenium, nickel, cobalt, palladium and iron etc.. In this paper the rhodium catalyzed cooligomerizations of ethylene and conjugated dienes were mainly studied. Rhodium catalyzed cooligomerization of ethylene with dienes gives versatile products with wide industrial applications. • For example, rhodium catalyzed cooligomerization of ethylene and 1,3-butadiene produces 1,4-hexadiene with a high selectivity to its trans-form, which is an important intermediate for the synthesis of EPDM (Ethylene-Propylene-Diene-Monomer). • Rhodium catalyzed cooligomerization of ethylene with conjugated methyl linoleate yields the branched and unsaturated fatty substances. The linoleate is a fatty substance direct from nature and sustainable resources. The branched fatty products and their derivatives possess low melting points and pour points, which have attractive prospects of applications in lubricants, cosmetics and some other industrial fields. • The rhodium catalyzed cooligomerization of ethylene and styrene affords 3-phenyl- 1-butene and serves as a model reaction for the synthesis of compounds with pharma- cological activity. Newsolventsystemsweredevelopedforthesecatalyticreactions. Mixturesofpolyethy- leneglycol1000andwaterwereusedfortherhodiumcatalyzedcooligomerizationofethy- lene and 1,3-butadiene. By using PEG1000/water solvent systems selective synthesis of trans-1,4-hexadiene has been achieved under moderate reaction conditions. PEG1000 based novel temperature-dependent multi-solvent systems were developed for the reac- tion of ethylene and conjugated methyl linoleate. Some poly-ether modified phosphorous ligands were synthesized and used to condition the product selectivity and suppress the catalyst leaching. Cinnamyl chloride was used as catalyst promoter and was found to be very effective in reactivating the decayed rhodium catalysts. More interesting is that the addition of this organic chloride largely enhanced the activity of rhodium catalysts in the reaction of ethylene and styrene.
Author: Qiang Miao Publisher: Cuvillier Verlag ISBN: 3736919018 Category : Science Languages : en Pages : 165
Book Description
The catalytic cooligomerizations of olefins are among the most important C-C coupling reactions. Many transition metals have been used as catalysts for this kind of reactions. They are rhodium, ruthenium, nickel, cobalt, palladium and iron etc.. In this paper the rhodium catalyzed cooligomerizations of ethylene and conjugated dienes were mainly studied. Rhodium catalyzed cooligomerization of ethylene with dienes gives versatile products with wide industrial applications. • For example, rhodium catalyzed cooligomerization of ethylene and 1,3-butadiene produces 1,4-hexadiene with a high selectivity to its trans-form, which is an important intermediate for the synthesis of EPDM (Ethylene-Propylene-Diene-Monomer). • Rhodium catalyzed cooligomerization of ethylene with conjugated methyl linoleate yields the branched and unsaturated fatty substances. The linoleate is a fatty substance direct from nature and sustainable resources. The branched fatty products and their derivatives possess low melting points and pour points, which have attractive prospects of applications in lubricants, cosmetics and some other industrial fields. • The rhodium catalyzed cooligomerization of ethylene and styrene affords 3-phenyl- 1-butene and serves as a model reaction for the synthesis of compounds with pharma- cological activity. Newsolventsystemsweredevelopedforthesecatalyticreactions. Mixturesofpolyethy- leneglycol1000andwaterwereusedfortherhodiumcatalyzedcooligomerizationofethy- lene and 1,3-butadiene. By using PEG1000/water solvent systems selective synthesis of trans-1,4-hexadiene has been achieved under moderate reaction conditions. PEG1000 based novel temperature-dependent multi-solvent systems were developed for the reac- tion of ethylene and conjugated methyl linoleate. Some poly-ether modified phosphorous ligands were synthesized and used to condition the product selectivity and suppress the catalyst leaching. Cinnamyl chloride was used as catalyst promoter and was found to be very effective in reactivating the decayed rhodium catalysts. More interesting is that the addition of this organic chloride largely enhanced the activity of rhodium catalysts in the reaction of ethylene and styrene.
Author: Matthias Kraume Publisher: Walter de Gruyter GmbH & Co KG ISBN: 3110709910 Category : Technology & Engineering Languages : en Pages : 586
Book Description
Liquid multiphase processes represent a promising option for realizing novel, efficient, and sustainable production processes, as required for the transformation towards climate-neutral manufacturing processes. This volume presents the results obtained over twelve years in the DFG-funded collaborative project Transregio 63 “Integrated Chemical Processes in Liquid Multiphase Systems”. In an interdisciplinary approach to the design and operation of such processes, essential principles of Green Chemistry are realized, such as using long-chain olefins as model representatives of renewable raw materials, highly effi cient catalysts, and green solvents, linked with process optimization to improve energy and material efficiency. Experts from different fields addressed all steps of the development process, from the description of the reactions on the molecular level via thermodynamics and the design of efficient separation processes to the operation of entire miniplants for liquid multiphase production processes. Thus, the complete development chain from the first reaction-related investigations in the laboratory to the technological realization in miniplants with model-based control is demonstrated. Numerous methodological innovations are proposed and validated using several innovative phase systems (thermomorphic multiphase systems, microemulsion systems, Pickering emulsions) and homogeneously catalyzed reactions. Engineers and chemists from the chemical industry as well as advanced students and researchers will get valuable insights into the physico-chemical phenomena in chemical multiphase processes and benefit from recommendations concerning methods for the selection of phase systems and rapid model-based process development.
Author: J. A. McCleverty Publisher: Newnes ISBN: 0080913164 Category : Science Languages : en Pages : 11845
Book Description
Comprehensive Coordination Chemistry II (CCC II) is the sequel to what has become a classic in the field, Comprehensive Coordination Chemistry, published in 1987. CCC II builds on the first and surveys new developments authoritatively in over 200 newly comissioned chapters, with an emphasis on current trends in biology, materials science and other areas of contemporary scientific interest.
Author: Hans-Jürgen Arpe Publisher: Wiley-VCH ISBN: 9783527201358 Category : Science Languages : en Pages : 742
Book Description
For more than eighty years, the name Ullmann's Encyclopedia of Industrial Chemistry has been synonymous with information of the highest quality. Chemists and engineers in industry and academia know that they can rely on the knowledge and expertise of around 3,000 first-class authors. The Fifth Edition, now available in print as a complete set, is a monumental reference work containing about 1,000 major articles, more than 16 million words, 30,000 figures, 10,000 tables, and innumerable references to further sources of information. Ullmann's users worldwide testify that this superb encyclopedia contains the most complete and up-to-date coverage of chemical technology currently available, including economic aspects, production, transportation, and toxicology. Ullmann's is unsurpassed in terms of organization and presentation. The encyclopedia consists of 37 volumes: 28 "A" volumes, 8 "B" volumes, and one cumulative Index volume. Volumes A1 - A28 contain alphabetically ordered articles on industrial chemicals, product groups, and production processes. Volumes B1 - B8 describe in detail the principles of chemical engineering, new and proven analytical methods, and the essentials of environmental protection technology. "This is a major work, which will prove immensely valuable to institutions and authorities related to the chemical industry." - Chemistry & Industry "...no science or engineering library should be without it." - Angewandte Chemie "Ullmann's might well be preferred...because of its many convenience features and excellent organisation." - Chemical Engineering
Author: P.W. Jolly Publisher: Elsevier ISBN: 0323146902 Category : Science Languages : en Pages : 533
Book Description
The Organic Chemistry of Nickel, Volume I: Organonickel Complexes is devoted to a description of the organonickel complexes. The major goal is to provide a reference work, and for this reason a conventional layout has been adopted with separate chapters devoted to each type of organic ligand. In the interest of readability, known compounds have been assembled in tables at the end of each chapter, thereby allowing the text to be used for discussions of the general chemistry involved and to highlight the special reactions associated with nickel. Conscious of the needs of organometallic chemists, the authors included systems in which no nickel-carbon bond is involved. Among these is a chapter on the tetrakisligand nickel complexes and sections on dioxygen and azobenzene complexes. The nitrosyl complexes and complexes containing a metal-metal bond—topics frequently considered to be part of the domain of the organometallic chemist—have not received individual attention. Tables of the observed bond distances in organonickel complexes are provided as an Appendix; a short list of the more important review articles relevant to each organic ligand can be found at the end of each chapter.
Author: A. Mortreux Publisher: Springer Science & Business Media ISBN: 9400938977 Category : Science Languages : en Pages : 371
Book Description
Catalysts are now widely used in both laboratory and industrial-scale chemistry. Indeed, it is hard to find any complex synthesis or industrial process that does not, at some stage, utilize a catalytic reaction. The development of homogeneous transition metal catalysts on the laboratory scale has demonstrated that these systems can be far superior to the equivalent heterogeneous systems, at least in terms of selectivity. is an increasing interest in this field of research from both an Thus, there academic and industrial point of view. In connection with the rapid developments in this area, four universities from the E.E.C (Aachen, FRG; Liege, Belgium; Milan, Italy; and Lille, France) have collaborated to organise a series of seminars for high-level students and researchers. These meetings have been sponsored by the Commission of the E.E.C and state organizations. The most recent of these meetings was held in Lille in September 1985 and this book contains updated and expanded presentations of most of the lectures given there. These lectures are concerned with the field of homogeneous transition metal catalysis and its application to the synthesis of organic intermediates and fine chemicals from an academic and industrial viewpoint. The continuing petroleum crisis which began in the early 1970s has given rise to the need to develop new feedstocks for the chemical industry.
Author: Qiang Miao
Author: Qiang Miao
Author: 
Author: Matthias Kraume
Author: Geoffrey Wilkinson
Author: Nihon Kagakkai
Author: J. A. McCleverty
Author: Hans-Jürgen Arpe
Author: International Union of Pure and Applied Chemistry
Author: P.W. Jolly
Author: A. Mortreux