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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Refining
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INFOTEXT
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1992-09-02
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408b
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12 lines
Refining is any process that purifies or
converts something into a more useful form.
Metals usually need refining after they have
been extracted from their ores by such
processes as smelting. Petroleum, or crude
oil, needs refining before it can be used.
The process involves fractional distillation,
the separation of the substance into separate
components or `fractions'.
Subject by: Vince Pike