Effects of Mercury in Brine on the Performance of the Membrane-Type Chlor-Alkali Plant

of high quality at high concentration (2,3). The performance of the membrane-type chlor-alltali plant mainly depends on the cell design, the membrane, the quality of feed brine, and operating conditions. Of these, the brine quality is the key factor affecting the service life and the performIn the case of conversion from amalgam to membrane process, it is important to elucidate the effects of mercury in the brinc used in the amalgam process plant on the performance of chelate resin and membrane cell. This is necessary, to know whether it is possible to use the existing brine process facilities and the brine itself in the membrane process plant. If not, new brine process facilities and :; * Electrochemical Society Active Member. ability. The closed points in the figure show the cathode potential in a laboratory cell. The potential in the commercial cell accords well with the laboratory results. On the other hand, the iron content in the activated cathode of the commercial cell was increased by electrolysis as shown by the triangular points in the figure. The figure illustrates the fact that the higher the iron content is the higher is the cathode overvoltage, an effect probably due to deactivation of the.coated cathode caused by iron powder deposits.