Patent classifications
C
CHEMISTRY; METALLURGY
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C01
INORGANIC CHEMISTRY
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C01D
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
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3/00
Halides of sodium, potassium or alkali metals in general
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C01D3/08
Preparation by working up natural or industrial salt mixtures or siliceous minerals
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