September 2, 2014 at 12:15 pm #47307
Ion-exchange technique has a long history, some natural materials such as zeolites and coal through sulfonation of sulphonated coal could be used as an ion-exchanger. However, with the rapid development of modern organic synthesis industry, was made up of many types of ion exchange resins with excellent performance, and developed a variety of new application method, ion-exchange technology developed rapidly in many industries, especially high-tech industries and scientific research in the field of wide application. Produces hundreds of kinds of resin at home and abroad in recent years, hundreds of thousands of tons of annual production.
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In industrial applications, the advantages of ion-exchange resins are mainly large handling capacity, wide range of bleaching, bleaching of high capacity, can remove a variety of ions, can be repeatedly reused, long working life, low operation cost (cost). Based on ion exchange resin of various new technologies, such as chromatographic separation method, ion-exclusion, electrodialysis, and each has its unique features, it can be a variety of special work are other ways to do it. Development and application of ion exchange technology is evolving rapidly.
Application of ion-exchange resins, is an important research topic in sugar industry at home and abroad in recent years, sugar is an important symbol of modernization. Application of membrane separation technology in the sugar industry have also been extensively studied.
Ion exchange resins are made with organic synthesis. Commonly used as raw material for styrene/acrylic acid (esters), polymerization reaction generates a three dimensional spatial structure of the skeleton, then imported on the skeletons of different types of chemical reactive Group (usually acidic or basic groups) and manufactured.
Ion exchange resin is insoluble in water and common solvents. The majority into a granular, there are some made from powdered or fibrous. Resin particle sizes in the range of 0.3~1.2mm, most of it in between 0.4~0.6mm. They have higher mechanical strength (fastness), the property is also very stable, have a long service life under normal circumstances.
Ion-exchange resin containing one (or several) chemically active groups, it is the exchange of functional groups, can dissociate in aqueous some cations (h + or NA +) or anion (such as OH-or Cl-), as well as adsorption of other cations or anions exist in a solution. The resin in the ion and ion exchange in aqueous solution, thus separating the ions in the solution.
Ion-exchange resin of many varieties, depending on the chemical composition and structure and have different functions and characteristics, suitable for different purposes. Resin according to the technical requirements of the application and the nature of the materials using suitable types and varieties.
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