Usage Note
Refinería is an industrial plant that processes crude oil into usable products (refinería de petróleo = oil refinery) or refines other raw materials such as sugar (refinería de azúcar). Without a qualifier, it most commonly refers to an oil refinery in modern usage. The verb is refinar and the abstract noun is refinamiento (refinement, also elegance of manner).
Examples
"La refinería produce miles de barriles al día."
Natural Translation
The refinery produces thousands of barrels a day.

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