Immobilized Catalysts

Immobilized Catalysts

- B. Desai, C.O. Kappe: Microwave-Assisted Synthesis Involving Immobilized Catalysts .- A. Kirschning, G. Jas: Applications of Immobilized Catalysts in Continuous Flow Processes .

Author: W. Bannwarth

Publisher: Springer Science & Business Media

ISBN: 3540209158

Category: Science

Page: 336

View: 932

Over the last decade the environmental setup has changed for synthetic organ ic chemists to a considerable degree. So far synthetic organic chemistry had focussed on methodology development which mainly deals with the develop ment of new reactions as well as new reagents and catalysts. These ought to be able to perform preferentially highly selective (chemo-, regio-and stereose lective) synthetic transformations, often applied in the context of complex and highly functionalized molecules. Except for the synthesis of peptides and oligonucleic acids, little attention has been spent on the question of how synthesis can be carried out in an envi ronment of sophisticated technologies which includes improved hardware. While peptides and oligonucleotides are conveniently prepared by Merrifield's solid phase technique, solution phase synthesis of most other synthetic targets have not been substantially replaced by this solid phase approach. Without discussing this aspect in detail it is obvious that today a renaissance of sophis ticated solution phase synthesis can be noted. Immobilization of reagents and particularly catalysts, an old concept indeed, recently returned back onto the stage and this is addressed in this volume of Topics in Current Chemistry in a broader sense.
Categories: Science

Catalyst Immobilization

Catalyst Immobilization

2. Catalysts. Immobilized. onto. Polymers. Shinichi Itsuno and Naoki Haraguchi
Toyohashi University of Technology, Department of Applied Chemistry and
LifeScience, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan
 ...

Author: Maurizio Benaglia

Publisher: John Wiley & Sons

ISBN: 9783527345090

Category: Technology & Engineering

Page: 496

View: 955

A comprehensive resource on techniques and applications for immobilizing catalysts Catalyst Immobilization: Methods and Applications covers catalyst immobilization topics including technologies, materials, characterization, chemical activity, and recyclability. The book also presents innovative applications for supported catalysts, such as flow chemistry and machine-assisted organic synthesis. Written by an international panel of expert contributors, this book outlines the general principles of catalyst immobilization and explores different types of supports employed in catalyst heterogenization. The book?s chapters examine the immobilization of chiral organocatalysts, reactions in flow reactors, 3D printed devices for catalytic systems, and more. Catalyst Immobilization offers a modern vision and a broad and critical view of this exciting field. This important book: -Offers a guide to supported and therefore recyclable catalysts, which is one of the most important tools for developing a highly sustainable chemistry -Presents various immobilization techniques and applications -Explores new trends, such as 3D printed devices for catalytic systems -Contains information from a leading international team of authors Written for catalytic chemists, organic chemists, process engineers, biochemists, surface chemists, materials scientists, analytical chemists, Catalyst Immobilization: Methods and Applications presents the latest developments and includes a review of the innovative trends such as flow chemistry, reactions in microreactors, and beyond.
Categories: Technology & Engineering

Catalysis by Polymer Immobilized Metal Complexes

Catalysis by Polymer Immobilized Metal Complexes

HydrogenationReferences Catalysts 2 Oxidation Reactions Catalyzed by
Immobilized Metal Complexes 2.1. Basic Laws of Oxidation Processes 2.2.
Activation and Binding of Dioxygen by Metal Polymers 2.3. Hydrocarbon
Oxidation by ...

Author: Anatoly D. Pomogailo

Publisher: CRC Press

ISBN: 9781000159530

Category: Science

Page: 424

View: 569

Deals with a new and promising field developed during the last two decades on the boundary between homogeneous and heterogeneous catalysis. This book presents general information on catalysis for a wide range of organic reactions, e.g., hydrogenation and oxidation reactions, and polymerization transformations. Special attention is paid to electro- and photochemical stimulation of catalytic processes in the presence of immobilized metal complexes. Other topics covered are the quantitative data on the comparison of catalyses by mobile and immobilized metal complexes; main factors affecting the activity of these catalytic systems and methods of optimizing their control; and specific problems of catalysis by fixed complexes (e.g., ligand exchange and electron transfer in metal polymer systems, macromolecular effects and polyfunctional catalysis).
Categories: Science

Chiral Catalyst Immobilization and Recycling

Chiral Catalyst Immobilization and Recycling

a combinatorial approach may be a valuable tool for the discovery of new
asymmetric catalysts partially because of the limitation of ... 9.3.1 Immobilized
DIOP Derivatives The immobilized catalysts that have been tested for the
asymmetric ...

Author: Dirk De Vos

Publisher: John Wiley & Sons

ISBN: 9783527613151

Category: Science

Page: 340

View: 953

Homogeneous asymmetric catalysis offers reliable results and the possibility to 'tune' the catalysis on a rational basis. A pitfall, however, is that the separation of the catalyst from the starting material and products is difficult and often results in the loss of the catalytic material. Immobilization offers a potential solution for the user of enantioselective catalysts in industrial processes and laboratories. Heterogeneous catalysis allows continuous operations, recycling of the catalyst, and an easy separation of the reaction products, reducing both waste and costs. Chemists in academia and industry will welcome this careful selection of topics in this handbook that provides readers with practical and detailed information about the technical requirements for the immobilization of chiral catalysts, their application in synthesis, and methods for recycling.
Categories: Science

Heterogenized Homogeneous Catalysts for Fine Chemicals Production

Heterogenized Homogeneous Catalysts for Fine Chemicals Production

In the course of this work, a modular approach for the covalent immobilization of
catalysts was developed. It is shown that immobilized catalysts with industrially
relevant properties can indeed be prepared but that these catalysts tend to be ...

Author: Pierluigi Barbaro

Publisher: Springer Science & Business Media

ISBN: 9048136962

Category: Science

Page: 462

View: 674

Table 1 E factors (tonnes of waste generated per tonne of product manufactured [7] Industry segment Annual product tonnage E factor 6 8 Oil refining 10 –10 Approx. 0. 1 4 6 Bulk chemicals 10 –10
Categories: Science

Asymmetric Catalysis from a Chinese Perspective

Asymmetric Catalysis from a Chinese Perspective

A number of methods have been developed for the immobilization of chiral
catalysts, typically including using inert organic or inorganic materials as
supports. However, most of the classical immobilized catalysts suffered from
inferior catalytic ...

Author: Shengming Ma

Publisher: Springer Science & Business Media

ISBN: 9783642194719

Category: Science

Page: 364

View: 630

Qi-Lin Zhou and Jian-Hua Xie: Chiral Spiro Catalysts.- Fuk Loi Lam, Fuk Yee Kwong and Albert S. C. Chan: Chiral Phosphorus Ligands with Interesting Properties and Practical Applications.- Jiang Pan, Hui-Lei Yu, Jian-He Xu, Guo-Qiang Lin: Advances in Biocatalysis: Enzymatic Reactions and Their Applications.- Mei-Xiang Wang: Enantioselective Biotransformations of Nitriles.- Man Kin Wong, Yiu Chung Yip and Dan Yang: Asymmetric Epoxidation Catalyzed by Chiral Ketones.- W. J. Liu, N. Li and L. Z. Gong: Asymmetric Organocatalysis.- Qing-Hua Fan and Kuiling Ding: Enantioselective Catalysis with Structurally Tunable Immobilized Catalysts.- Chang-Hua Ding, Xue-Long Hou: Transition Metal-Catalyzed Asymmetric Allylation.- Jian Zhou and Yong Tang: Enantioselective Reactions with Trisoxazolines.- Xiang-Ping Hu, Duo-Sheng Wang, Chang-Bin Yu, Yong-Gui Zhou, and Zhuo Zheng: Adventure in Asymmetric Hydrogenation: Synthesis of Chiral Phosphorus Ligands and Asymmetric Hydrogenation of Heteroaromtics.
Categories: Science

Handbook of Asymmetric Heterogeneous Catalysis

Handbook of Asymmetric Heterogeneous Catalysis

Hence, the immobilization of homogeneous catalysts for heterogeneous
asymmetric catalysis, as one of the most favorable methods for resolving these
problems, has recently attracted a great deal of attention [3]. Over the past few
decades, ...

Author: Kuiling Ding

Publisher: John Wiley & Sons

ISBN: 9783527623020

Category: Science

Page: 466

View: 332

In this most up-to-date handbook each chapter contains a general introduction, followed by the principles of the immobilization and, finally, applications. In this way, it covers the most important approaches currently employed for the heterogenization of chiral catalysts, including data tables, applications, reaction types and literature citations. For chemists in both academia and industry as well as those working in the fine chemical and pharmaceutical industry.
Categories: Science

Polymeric Chiral Catalyst Design and Chiral Polymer Synthesis

Polymeric Chiral Catalyst Design and Chiral Polymer Synthesis

Polymer-immobilized chiral catalysts and reagents have received considerable
attention in regard to organic synthesis of optically active compounds. The use of
polymer-immobilized catalysts has become one of the essential techniques in ...

Author: Shinichi Itsuno

Publisher: John Wiley & Sons

ISBN: 1118063953

Category: Technology & Engineering

Page: 522

View: 781

This book reviews chiral polymer synthesis and its application to asymmetric catalysis. It features the design and use of polymer-immobilized catalysts and methods for their design and synthesis. Chapters cover peptide-catalyzed and enantioselective synthesis, optically-active polymers, and continuous flow processes. It collects recent advances in an important field of polymer and organic chemistry, with leading researchers explaining applications in academic and industry R & D.
Categories: Technology & Engineering

Recoverable and Recyclable Catalysts

Recoverable and Recyclable Catalysts

Tamilselvi Chinnusamy, Petra Hilgers and Oliver Reiser Institutf€ur Organische
Chemie, Universit€at Regensburg, Regensburg, Germany 4.1 Introduction The
immobilization of small organic catalysts (metal–ligand complexes or small
organic ...

Author: Maurizio Benaglia

Publisher: John Wiley & Sons

ISBN: 0470682019

Category: Science

Page: 500

View: 474

Recoverable and Recyclable Catalysts There is continued pressure on chemical and pharmaceutical industries to reduce chemical waste and improve the selectivity and efficiency of synthetic processes. The need to implement green chemistry principles is a driving force towards the development of recoverable and recyclable catalysts. The design and synthesis of recoverable catalysts is a highly challenging interdisciplinary field combining chemistry, materials science engineering with economic and environmental objectives. Drawing on international research and highlighting recent developments, this book serves as a practical guide for both experts and newcomers to the field. Topics covered include: An introduction to the principles of catalyst recovery and recycling Catalysts on insoluble and soluble support materials Thermomorphic catalysts, self-supported catalysts and perfluorous catalytic systems The development of reusable organic catalysts Continuous flow and membrane reactors Each chapter combines principles with practical information on the synthesis of catalysts and strategies for catalyst recovery. The book concludes with a comparison of different catalytic systems, using case studies to illustrate the key features of each approach. Recoverable and Recyclable Catalysts is a valuable reference source for academic researchers and professionals from a range of pharmaceutical and chemical industries, particularly those working in catalysis, organic synthesis and sustainable chemistry.
Categories: Science

Lanthanides Chemistry and Use in Organic Synthesis

Lanthanides  Chemistry and Use in Organic Synthesis

Although the use of immobilized homogeneous catalysts is of continuing interest,
few successful examples are known for polymer-supported Lewis acids. The
unique characteristics of rare earth Lewis acids have been utilized, and efficient ...

Author: G. Molander

Publisher: Springer Science & Business Media

ISBN: 9783540645269

Category: Science

Page: 305

View: 533

The use of lanthanides in organic chemistry and in organic synthesis has attracted broad interest recently because of the unique reactivities and selectivities exhibited by compounds of these rare earth elements. In particular, several major advances have been made in the last five years. This volume of Topics in Organometallic Chemistry is designed to provide the specialist and non-specialist alike with a much needed overview of recent developments. Contributions by leaders in the field focus on stereoselective organic synthesis using lanthanides, the principles of lanthanide chemistry, lanthanide-based chiral catalysts, low-valent lanthanide compounds, polymer synthesis using lanthanide catalysts, and polymer-supported lanthanide catalysts used in organic synthesis.
Categories: Science

Polymeric Materials in Organic Synthesis and Catalysis

Polymeric Materials in Organic Synthesis and Catalysis

It is not the substrate which remains attached to the solid support during a multi-
step synthesis until it is finally cleaved from the support, but instead, the
immobilized reagent or catalyst promotes a chemical transformation of a
substrate which is ...

Author: Michael R. Buchmeiser

Publisher: John Wiley & Sons

ISBN: 9783527605682

Category: Science

Page: 582

View: 363

This is the first book to describe the synthesis and characterization of the materials used in polymer-supported synthesis. The authors cover not only the classical polymers and their use in homogeneous, heterogeneous and micellar catalysis, but also such new developments as "enzyme-labile linkers", illustrating how to simplify the purification process and avoid waste. The result is a wealth of useful information -- for beginners and experts alike - in one handy reference, removing the need for difficult and time-consuming research among the literature.
Categories: Science

Homogeneous Catalysts

Homogeneous Catalysts

Immobilization on a particulate support material is a vital requirement for
widespread implementation of homogeneous catalysts in polyolefin production
processes. The effects of immobilization on catalyst activity are dependent on
both ...

Author: John C. Chadwick

Publisher: John Wiley & Sons

ISBN: 9783527636006

Category: Science

Page: 418

View: 901

This first book to illuminate this important aspect of chemical synthesis improves the lifetime of catalysts, thus reducing material and saving energy, costs and waste. The international panel of expert authors describes the studies that have been conducted concerning the way homogeneous catalysts decompose, and the differences between homogeneous and heterogeneous catalysts. The result is a ready reference for organic, catalytic, polymer and complex chemists, as well as those working in industry and with/on organometallics.
Categories: Science

Carbon Materials for Catalysis

Carbon Materials for Catalysis

CRISTINA FREIRE and ANA ROSA SILVA 8.1 INTRODUCTION Immobilization of
transition-metal complexes with catalytic properties onto solid supports is a
theme of intense research [1–10]. Most reports on complex immobilization
describe ...

Author: Philippe Serp

Publisher: John Wiley & Sons

ISBN: 0470403691

Category: Science

Page: 608

View: 426

This is the first comprehensive book covering all aspects of the use of carbonaceous materials in heterogeneous catalysis. It covers the preparation and characterization of carbon supports and carbon-supported catalysts; carbon surface chemistry in catalysis; the description of catalytic, photo-catalytic, or electro-catalytic reactions, including the development of new carbon materials such as carbon xerogels, aerogels, or carbon nanotubes; and new carbon-based materials in catalytic or adsorption processes. This is a premier reference for carbon, inorganic, and physical chemists, materials scientists and engineers, chemical engineers, and others.
Categories: Science

Polymer Surface Modification

Polymer Surface Modification

Immobilization of Organometallic Catalysts on Textile Carrier Materials Klaus
Opwis∗, Thomas Mayer-Gall, Torsten Textor and Eckhard Schollmeyer
Deutsches Textilforschungszentrum Nord-West e.V., Adlerstr. 1, D-47798 Krefeld,
Germany ...

Author: K. L. Mittal

Publisher: BRILL

ISBN: 9789004165908

Category: Technology & Engineering

Page: 394

View: 871

The topic of polymer surface modification is of tremendous contemporary interest because of its critical importance in many and varied technological applications where polymers are used. Currently there is brisk research activity in unraveling the mechanisms of surface modification and finding ways to prolong the life of surface treatment. Also there is acute interest and need to devise new, improved and economical means to modify polymer surfaces. This book is divided into three parts as follows: Part 1: Surface Modification Techniques; Part 2: Interfacial Aspects and Adhesion; Part 3: General Papers. The topics covered include: various techniques for surface modification including plasma (both vacuum and atmospheric pressure), ozone, photografting, UV photo-oxidation, laser, use of charged particles and others for a variety of polymers; longevity of surface treatment; hydrophobic recovery; fabrication of high-density polymer nano-dots; immobilization of organometallic catalysts on textile carrier materials; polymer membrane antifouling properties; electroless metallization of polymers; effects of surface modification on interfacial shear strength of composites, cord/rubber adhesion, adhesion of UV-curable coatings and attachment of hyperbranched polymers; plasma polymerization; block copolymers; application of plasma technology in decontamination of heat-sensitive polymer surfaces. In essence this book reflects the current state-of-the-knowledge in the arena and represents the work of many renowned scientists and technologists. It should be of interest to anyone with a desire or need to learn the latest R&D activity in this domain and the information contained here should be very valuable in deciding the optimum surface modification technique for his/her particular requirements.
Categories: Technology & Engineering

Synthetic Methods of Organometallic and Inorganic Chemistry

Synthetic Methods of Organometallic and Inorganic Chemistry

Immobilization on Silica Gel When drying silica gel with vacuum , a sinter plate
should be placed between the flask and the ... which can be detrimental for the
catalytic properties of the immobilized catalysts , most probably through
restriction of ...

Author: Wolfgang A. Herrmann

Publisher: Georg Thieme Verlag

ISBN: 3131151617

Category: Chemistry, Inorganic

Page: 237

View: 743

The last in this ten-volume series, this text covers the most important standard compounds to be generally used in laboratories engaged in all branches of synthetic chemistry.
Categories: Chemistry, Inorganic

Synthetic Methods of Organometallic and Inorganic Chemistry Volume 10 2002

Synthetic Methods of Organometallic and Inorganic Chemistry  Volume 10  2002

Ir is known to have a strong tendency to form very stable, hydrogen-bridged
dimers that have no catalytic activity. ... The homogeneous catalyst is much less
active and productive than the corresponding immobilized catalysts, especially
when ...

Author: W. A. Herrmann

Publisher: Georg Thieme Verlag

ISBN: 9783131795113

Category: Science

Page: 253

View: 324

Designed as a benchtop tool, the series includes detailed and reliable experimental procedures for the preparation of common but imp ortant starting compounds, organized according to the periodic table. Properties of the compounds and additional references are also provided. In most cases, no strict borderline has been drawn between inorganic and organometallic compounds. Instead, the material is conveniently presented so that for every group of elements, the various aspects of the chemistry are combined. Several hundred in ternational specialists with established expertise in their respective fields have contributed, resulting in proven and reliable pre parations. In view of the enormous growth of organometallic chemistry, Synthetic Methods of Organometallic and Inorganic Chemistry p rovides you with a balanced compilation of carefully selected and representative examples for all classes of compounds. // The conte nt of this e-book was originally published in 2002.
Categories: Science

Science and Technology in Catalysis

Science and Technology in Catalysis

immobilization. of. ATRP. catalysts. on. a. solid. support. ,. providing. a. more
efficient way of separating and potentially ... Haddleton et al . immobilized a Cul
pyridylmethanimine complex [ 38 ] on both silica and polystyrene bead through ...

Author: Masakazu Anpo

Publisher: Gulf Professional Publishing

ISBN: 0444513493

Category: Science

Page: 564

View: 248

(Selected) -- Plenary Lecures: New Catalysts for Controlled/Living Atom Transfer Radical Polymerization (ATRP; Catalysis and Applications of Gold Nanoparticles -- Oral Presentations: Ionic Liquids as New Solvents and Catalysis for Petrochemical and Refining Processes; High Throughput Experiment on the Investigation of Oxidation Catalysts with Gas Sensor System -- Poster Presentations: Development of a Low-Temperature Dioxin Decomposition Catalyst; Studies on Unique Properties of Polyolefins Prepared with Metallocene Catalyst Systems -- Index.
Categories: Science

Modern Surface Organometallic Chemistry

Modern Surface Organometallic Chemistry

Catalysts–. From. Homogeneous. to. Immobilized. Systems. 5. AntonyJ. Ward,
Anthony F. Masters, and Thomas Maschmeyer ... are the principle advantages of
homogeneous organometallic catalysis, when operating under ideal conditions.

Author: Jean-Marie Basset

Publisher: John Wiley & Sons

ISBN: 9783527627103

Category: Science

Page: 725

View: 559

Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Categories: Science

Enzymes in Food Processing

Enzymes in Food Processing

... its production devised around 1815, was an early use of immobilized cells.
Enzymes, consisting of thousands of atoms in precise arrangements, are
biological catalysts, which promote the transformation of chemical species in
living systems.

Author:

Publisher: I. K. International Pvt Ltd

ISBN: 9789380026336

Category: Enzymes

Page: 365

View: 577

This book reflects an in depth study of high academic standards dealing in a coherent and lucid way the most comprehensive and advances in application of enzymes in food processing. This indispensable treatise is the product of combined efforts of leading experts of excellent academic credentials in the area of food technology and biotechnology. This unique volume gives a holistic view about the interventions of enzymes in food processing i.e. " Handles different enzymes used in food processing at one platform. " Discusses the methods of enzyme immobilization and application of immobilized enzymes in food processing. " Describes the use of enzymes as food analytical tools including biosensors " Illustrates the knowledge about novel strategies in enzyme designing. " Numerous tables and figures throughout the volume provide illustrative material to support the detailed information The present volume is an excellent resource of information especially for food scientists/technologists, biotechnologists, biochemical engineers, biochemists, organic chemists, graduate and research students.
Categories: Enzymes

Multicatalyst System in Asymmetric Catalysis

Multicatalyst System in Asymmetric Catalysis

The use of immobilized catalysts/substrates, either soluble or insoluble, to
accommodate individual catalysts/substrates into organic, aqueous, solid, or
fluoro phase, respectively, could effectively suppress the possible undesired
deactivation ...

Author: Jian Zhou

Publisher: John Wiley & Sons

ISBN: 9781118846933

Category: Science

Page: 712

View: 792

This book introduces multi-catalyst systems by describing theirmechanism and advantages in asymmetric catalysis. • Helps organic chemists perform more efficientcatalysis with step-by-step methods • Overviews new concepts and progress for greener andeconomic catalytic reactions • Covers topics of interest in asymmetric catalysisincluding bifunctional catalysis, cooperative catalysis,multimetallic catalysis, and novel tandem reactions • Has applications for pharmaceuticals, agrochemicals,materials, and flavour and fragrance
Categories: Science