Electrodialysis reliability

Ionics introduces the reverse polarity process, a breakthrough in electrodialysis plant reliability -1970... 

The technique of electrodialysis appears to us as a very complicated and unrewarding way of studying cationic polymerisations and we feel that the propagation rate constants and other supposedly fundamental studies reported by D yachkovskii s group are not entirely reliable because of the large number of assumptions required for the treatment of the experimental data. 

Electrodialysis Fouling Temperatur e stability Cost Selectivity Reliability Process reliability and selectivity are adequate for current uses. Improvements could lead to cost reduction, especially in newer applications... 

The state-of-the-art in membrane techniques is shown in the figure ( via[8])where the advances in individual membrane operations are defined in terms of availability, service reliability, and price warranty. Research on the first group of methods primarily covers process optimization problems. From the data included in the figure, it is obvious that by far the most advanced methods are the long established membrane processes such as dialysis, microfiltration, ultrafiltration, hyperfiltration, reverse osmosis and electrodialysis. It is also evident that the dynamics of sale shows a tendency to decrease. 

A large-scale sheet flow type of electrodialysis plant can be operated satisfactorily and reliably when large membranes and large presses are used. 

Montonnet et al. (1994) did a great deal of work on defining the conditions for using electrodialysis to stabilize wine, identifying suitable membranes and process control so that each wine is treated according to its specific level of instability. This has made electrodialysis technology reliable and effective, while avoiding excessive alterations in the wine s chemical composition. 

Electrodialysis has industrial applications where salts must be separated from high-boiling substances. Reliable scale-up is possible. 

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