Exactly what procedure you follow when making Sodium Chlorate is up to you. It depends on the Anode materials that you have available
and on what Chlorate (or Perchlorate) salt that you ultimately want.
If you are ultimately going to make Sodium Perchlorate you may decide to separate the Chlorate and Perchlorate steps by separating out the Sodium Chlorate and then using this Chlorate in another cell to make Perchlorate. You may decide not to separate the Chlorate and Perchlorate stages (labour saving) and simply keep running your cell without separating out the Chlorate as per US patent 3,493,478 (see the Sodium Perchlorate section). You need a Lead Dioxide Anode to run from Chloride all the way to Perchlorate as wear rates ($$$) on Platinum may be too high. Graphite or Manganese Dioxide will not work. Magnetite may work if you run the cell long enough and it may not reduce the Chlorate to a low level.
If you have enough evaporation from the cell you can run a continous process by adding NaCl solution to the cell. The Na Chlorate will crystallize out when the concentration gets high enough.
If you are making Potassium Chlorate (from the Sodium Chlorate) you can simply run your cell for the required run time and take out a crop of Potassium Chlorate by adding KCl and start running the cell again.
Removal of product.
Collection of graphs and tables for Na Chlorate and Chloride.
Cost of making Sodium Chlorate.
Article from Encyclopedia of electro chemistry regarding Chlorate making
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