Leblanc process
noun
Le·blanc process
ləˈbläⁿ-,
-äŋk-
: a process formerly used for manufacturing soda by treating salt with sulfuric acid, heating the resulting sodium sulfate with limestone and coal, and extracting with water the soluble sodium carbonate from the dark-colored mass formed
also
: a similar process for manufacturing potash
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Merriam-Webster unabridged
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