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Castner–Kellner process
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<p>The Castner–Kellner process is a method of <a href="/facts/Electrolysis/pU75nCDI">electrolysis</a> on an <a href="/facts/Aqueous/eRNr3MH2">aqueous</a> <a href="/facts/Alkali/s6NqPGSP">alkali</a> <a href="/facts/Chloride/m9NUaUDR">chloride</a> solution (usually <a href="/facts/Sodium_chloride/MWcXl3Mb">sodium chloride</a> solution) to produce the corresponding alkali <a href="/facts/Hydroxide/zW0wxpWD">hydroxide</a>, invented by American <a href="/facts/Hamilton_Castner/IbAnuph7">Hamilton Castner</a> and Austrian <a href="/facts/Carl_Kellner_(mystic)/bpwkqYNq">Carl Kellner</a> in the 1890s. It is a type of <a href="/facts/Chloralkali_process/5aAamEP9">chloralkali process</a>, but in this role it is gradually being replaced by <a href="/facts/Membrane/FDlaJe23">membrane</a> electrolysis which has lower energy cost and fewer environmental concerns. </p>