Overview
ABSTRACT
Ion exchange resins are used to soften and demineralize water, and also in various other applications, many of them outside water treatment. This article reviews ion exchange processes in specific areas of water purification and in the treatment of numerous other solutions in large areas of the food, pharmaceutical, chemical, and hydrometallurgical industries.
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Read the articleAUTHOR
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François de DARDEL : Chemical engineer, Swiss Federal Institute of Technology Zurich - Former Technical Director at Rohm and Haas in Paris, France
INTRODUCTION
The basic principles of ion exchange are described in article
Although ion exchange was initially used mainly in water treatment, numerous applications in a variety of industries began to appear as early as the 1950s. Today, they consume around half the volume of ion exchange resins produced. In this article, we first look at a few special water treatment processes: denitration, ultrapure water production for the semiconductor industry and condensate treatment. In the second part, we present an overview of ion exchange processes applied in other industries. The list of applications is not exhaustive.
All the processes mentioned here are implemented on an industrial scale, sometimes using considerable volumes of resin. For sugar juice treatment or uranium hydrometallurgy, these volumes can reach tens of cubic meters of resin per column .
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KEYWORDS
sugar | resins | chemical industry | food industry | pharmaceutical industry | purification | recovery | separation
CAN BE ALSO FOUND IN:
Ion Exchange Applications
Special ion exchange processes in water treatment
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