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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C07C51/42
Separation; Purification; Stabilisation; Use of additives
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C07C51/43
by change of the physical state, e.g. crystallisation
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