animal charcoal

animal charcoal

noun
carbon obtained from the carbonization of organic tissue of animals.
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Encyclopedia Britannica
Encyclopedia

animal charcoal

a form of charcoal (q.v.) produced by heating bone in the presence of a limited amount of air. It is used in removing coloured impurities from liquids, especially solutions of raw sugar. Bone black contains only about 12 percent elemental carbon, the remainder being made up principally of calcium phosphate and calcium carbonate.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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