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Lix-iv-i-a′tion.

The process of separating a soluble from an insoluble material by a washing or filtering action. Leaching.

Lixiviation removes a soluble material, which is the valuable portion, as in discharging a certain amount of syrup from a bone-black filter, by passing water therethrough. The leaching of ashes is a familiar instance of lixiviation.

Elutriation is the separation of more soluble and comparatively useless portions from one less soluble, by allowing the latter to settle and decanting the supernatant liquor, as in the case of removing the saccharine and coloring matter from starch in the starch manufacture.

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