Patent classifications
C
CHEMISTRY; METALLURGY
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C01
INORGANIC CHEMISTRY
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C01B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF;; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
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C01B17/02
Preparation of sulfur; Purification
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C01B17/04
from gaseous sulfur compounds including gaseous sulfides
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C01B17/05
by wet processes
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