Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
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51/00
Preparation of carboxylic acids or their salts, halides or anhydrides
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C07C51/347
by reactions not involving formation of carboxyl groups
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C07C51/363
by introduction of halogen; by substitution of halogen atoms by other halogen atoms
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