Process for removing a layer of thick mercury from the bottom of mercury-cathode electrolysis cells and a process for the electrolysis of an aqueous solution of an alkali metal halide in a mercury-cathode cell

摘要

To remove a layer of thick mercury from the bottom of electrolysis cells having a cathode formed by a film of mercury flowing over the bottom, a scraper is moved in the mercury film in a controlled manner to leave continuously a residual film of thick mercury of predetermined thickness adhering to the bottom. The process applies to mercury-cathode cells for the electrolysis of aqueous solutions of sodium chloride.