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The development of ion exchange resins

Views:1     Author:Site Editor     Publish Time: 2008-07-22      Origin:Site

Ion exchange technology has a long history, some natural substances, such as foam zeolite and coal obtained through sulfonation sulfonation of coal are used as ion exchanger. However, with modern organic synthesis industry, rapid technological development, research and made a number of types of ion exchange resins with excellent performance, and the development of a variety of new application methods, ion exchange technology developed rapidly, in many industries, especially high-tech industry and widely used in scientific research in the field. In recent years, domestic production of resin, up to hundreds of species, hundreds of tons of annual production.
In industrial applications, the advantages of ion exchange resins are mainly large capacity, marking a wide range of high capacity bleaching can remove a variety of ions, can be repeated use of renewable, long working life, lower operating costs (although the cost of an input larger). Ion exchange resin Wei basis of a variety of new technologies, such as chromatographic separation, ion exclusion method, electrodialysis law, Ge with Dute of Gongneng, Keyijinxing various special work is difficult to achieve in other ways. Ion exchange technology development and application is still rapidly evolving.

The application of ion exchange resins, domestic sugar industry in recent years a focus of research topic is an important symbol of modernization sugar. Membrane separation technology in the application of sugar has also been extensively studied.

Ion exchange resins are made with organic synthesis. Raw materials used for the styrene or acrylic acid (ester), through the polymerization reaction with the three-dimensional three-dimensional network structure of the skeleton, then the skeleton into the different types of chemical active groups (usually acidic or basic groups) and the system into.
Ion exchange resins do not dissolve in water and common solvents. Most manufactured granular, some made of fiber or powder. Resin particle size generally in the range of 0.3 ~ 1.2mm, mostly in between 0.4 ~ 0.6mm. They have high mechanical strength (fastness of), is also very stable chemical properties, under normal circumstances, have a longer life.
Ion exchange resin containing one (or several) chemical active groups, it is the exchange of functional groups in aqueous solution to dissociate from some of the cations (such as H + or Na +) or anions (eg OH-or Cl-), while solution of the original adsorption of other cations or anions exist. The resin in the ion and ion exchange in solution, thereby separating ions in solution.

Many kinds of ion exchange resins, because of different chemical composition and structure have different functions and features, suitable for different purposes. Application of resin materials according to process requirements and the nature of the choice of appropriate types and varieties.

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