M.J. Slater – författare

The Principles of Ion Exchange Technology covers the fundamental properties of ion exchange resins and the chemical engineering principles of plant design to aid process and equipment evaluation, choice and design. This text is composed of 12 chapters and begins with a discussion of the equilibrium concept and the calculation of diffusion coefficients and mass transfer coefficients, as well as the rate constants in ion exchange. The succeeding chapters deal with the kinetics of ion exchange in solution and in resin beads. These topics are followed by reviews of axial mixing, flow abnormalities, design equations, fixed bed performance calculation, and multi-component ion exchange. The final chapters explore the choices of continuous and countercurrent design techniques and the practical procedures for packed beds. This book is of great value to chemical engineers.

This volume contains the papers presented at the Sixth International Ion Exchange Conference organised by the SCI and held at Churchill College, Cambridge, UK, in July 1992. As on previous occasions, most recently in 1988, the organising committee did not engage plenary speakers but decided to solicit state-of-the-art contributions from the ion exchange community. This book contains the refereed papers presented at the meeting, whether in poster or oral form. Extra papers were presented at the meeting as posters because they were not available in time for refereeing purposes. The subject matter of the meeting and therefore the contents of the book is subdivided into seven separate topic areas as follows: resin developments; water treatment; fundamentals; biotechnology, food and pharmaceuticals; environmental and pollution control; membranes, inorganic materials and nuclear; and hydrometallurgy. The coverage of the meeting is similar to 1988 although there are fewer subdivisions on this occasion. The more restricted coverage this time reflects the smaller number of papers offered by authors. This is probably due to the world­ wide industrial recession which has affected commercial development and exploitation of the technology and restricts the ability of practitioners and academics to contribute to and attend international meetings. Nevertheless, the advances in biotechnology, growing concern about the environment and the. need for novel separation processes have provided sufficient impetus to stimulate a sufficient number of workers in the field.

Solvent extraction is now a most powerful separation and purification tool in the process industries. It is used commercially in hydrometallurgy (including the nuclear industry) and widely within the chemical industry including organic chemicals, petrochemicals and pharmaceuticals. That the technique has risen to prominence in only a few decades is undoubtedly due to the vast amount of research and development carried out not only into reagents, their extraction chemistry and performance in a wide variety of systems, applications and process development but also in the development of appropriate equipment for the process without which process development would be impossible. The scientific literature is rich in papers from fundamental solvent extraction studies on basic physical chemistry, co-ordination chemistry, extraction chemistry, chemical kinetics to process development through to the chemical engineering fundamentals and design required to understand the process of solvent extraction and to permit design and engineering of processes and equipment.The investigation in recent years of phenomena such as reversed micelles, microemulsions, liquid membranes and lyotropic liquid crystals still requires further research, as does the continuing search for a direct method of studying the interfacial reactions involved in many solvent extraction systems and direct identification and characterization of the interfacial species. In planning ISEC '93 the Organizing Committee selected as the conference theme "Solvent Extraction in the Process Industries" noting that, while solvent extraction continues to develop improved processing, yields, separations and reduced costs, it was timely to seek to answer the questions such as: How does this technology measure up in today's environmentally aware world? Where should new developments be? and What should the goals be now for workers in both solvent extraction and liquid membranes? The conference aimed to provide answers to these questions.