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Why does the cell voltage increase in ion-exchange membrane cells when Shandong sea salt is used?

2021-11-15View Original

Thread Content

Gentlemasters! Our company uses sea salt from Shandong: 0.23% calcium, 0.09% magnesium, 0.69% sulfate ions, 94.9% sodium chloride, 3.0% moisture content, and 0.55% water-insoluble substances. The parameters related to the water quality after secondary treatment are normal; however, the voltage of the tank units increases by about 40 mv after using this salt. Has anyone encountered this issue? What substance has an impact?
Reply #22021-11-16
For a period of time, our company experienced high voltages in the electrolyzers; it was later found that the problem lay with the raw salt. We suggested that the company test the iodine content in the raw salt and compare it with previous values
Reply #32021-11-16
It is recommended to analyze and test the iodide and bromide content in refined saline.
Reply #42021-11-16
Does bromine vaporize in the electrolyzer? Its boiling point is 59 degrees. The iodine content needs to be checked
Reply #52021-11-16
Similar to chloride ions in saline water, bromine also refers to bromine in ionic form. The boiling point of Br2 is 59 degrees, while that of Cl2 is only -34.6 degrees!
Reply #62021-11-16
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