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be directly attributed to sodium chloride, e.g. mercury emissions, were partitioned between the products on a simple mass basis. Steam input to the chlorine cell In an earlier report,1 the steam input to chlorine cells was all attributed to sodium hydroxide on the assumption that this was the primary reason for this input. From the present data, however, it is clear that this is not so. Many plants which reported separately the NaOH concentration stage also reported steam inputs to the cell itself. The steam input to the chlorine cell has therefore been partitioned across all products on a simple mass basis. HCl input to the chlorine cell Any HCl input to the cell electrolyte will be completely dissociated and will therefore provide an additional source of chloride ions in the electrolyte. It has therefore has been attributed to the production of chlorine. NaOH input to the chlorine cell Any NaOH input to the cell has been attributed solely to the production of NaOH on the assumption that it will be recovered along with the NaOH generated within the electrolytic process. Sulphuric acid input An input of 98% sulphuric acid is used for chlorine drying and so has all been attributed to the chlorine output. Hydrogen emissions from the chlorine cell Hydrogen emissions from the cell refer to the losses of hydrogen to the atmosphere. These emissions have therefore all been attributed to the production of hydrogen. Chlorine emissions from the chlorine cell Chlorine gas emissions from the cell refer to the loss of chlorine to the atmosphere. These emissions have therefore all been attributed to the production of chlorine. 1 I Boustead. Ecoprofiles of the European polymer industry: Report 6: Polyvinyl chloride. A report for APME’s technical and Environmental Centre, Brussels. April 1994. cl2 9PDF Image | CHLORINE Euro Eco Profile
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