refinement
noun
[ rɪˈfʌɪnm(ə)nt ]
• the process of removing impurities or unwanted elements from a substance.
• "the refinement of uranium"
Similar:
purification,
refining,
clarifying,
clarification,
cleansing,
straining,
sifting,
filtering,
filtration,
rarefaction,
distillation,
concentration,
processing,
treatment,
treating,
rectification,
