Table of contents : Cover Applicative Chemistry of Tanning Metallic Heterocomplexes Copyright Contents Foreword Preface Acknowledgements Conflict of Interest 1. Understanding of Leather Tanning Abstract Brief History Leather Tanning, the Art of Processing a Biopolymer – the Collagen Definition The Mechanism of Collagen Crosslinking Using Various Tanning Agents Vegetable/Synthetic Tanned Leathers Mineral Tanned Leathers Other Tanning Methods Oil Tanning Tanning/Retanning Using Chromium in Leather Tanning Basic Chromium Salts, oLo and oxo Compounds Chromium-Collagen Compounds Practical Aspects Masking with Acetate Masking with Phthalates 2. Chromium in the Leather Industry and its Environmental Implications Abstract The Environment and the Use of Chromium Salts in Leather Tanning Methods of Fixing-Exhausting Chromium from Wastewaters Partially Replacing Chromium with Another Tanning Material Direct Recirculation of Wastewaters Recycling Basic Chromium Salts from Wastewaters Using the Wet-White Tanning Process 3. Synthesis and Use of Tanning Metallic Heterocomplexes Absrtact Synthesis, Structure and Properties of Tanning Metallic Heterocomplexes 4. Theory and Experimentation of Synthesis Reactions of Tanning Metallic Heterocomplexes Abstract Theoretical Synthesis Reactions of Tanning Metallic Heterocomplexes Basic Chromium Complexes Basic Chromium-Aluminium Heterocomplexes Basic Chromium-Iron Heterocomplexes Basic Chromium-Aluminium-Iron Heterocomplexes Basic Chromium-Zirconium Heterocomplexes Basic Chromium-Aluminium-Zirconium Heterocomplexes Basic Chromium-Iron-Zirconium Heterocomplexes Synthesis of Heterocomplexes Based on Chromium, Aluminium, Iron or Zirconium Synthesis of Chromium-Iron Heterocomplexes Synthesis of Chromium-Iron-Zirconium Heterocomplexes Pilot Scale Synthesis of Chromium-Iron Tanning Metallic Heterocomplexes Pilot Scale Synthesis of Chromium-Aluminum-Iron Tanning Metallic Heterocomplexes Pilot Scale Synthesis of Chromium-Iron-Zirconium Tanning Metallic Heterocomplexes 5. Structural Analysis of Tanning Metallic Heterocomplexes and Testing their Tann Abstract Structural Characteristics of Tanning Metallic Heterocomplexes Near Infrared Spectroscopy (200-400 cm-1) Reflection Spectroscopy Electron Paramagnetic Resonance (EPR) Scanning Electron Microscopy (SEM) and Energy-Dispersive X-Ray Analysis (EDAX) Analyses on Metal Heterocomplex Solutions Determining the Electric Charge of Tanning Solution Components Separating Components from the Chromium-Iron Tanning Solution. Chemical and Spectral Analysis of Components Separating Components from the Chromium-Aluminum-Iron Tanning Solution. Chemical and Spectral Analysis of Components Separating Components from the Chromium-Iron-Zirconium Tanning Solution. Chemical and Spectral Analysis of Components References Index A B C E I G H L M O P R S T V Z