Information AboutRefining |
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The refining of Liquid s is often accomplished by Distillation or Fractionation . Gas es can be refined in this way as well, by being cooled and/or compressed until they liquefy. Gases and liquids can also be refined by Extraction with a selective Solvent that dissolves away either the substance of interest, or the unwanted impurities. Many Solid s can be refined by growing Crystal s in a Solution of the impure material; the regular structure of the crystal tends to favor the desired material and exclude other kinds of particles. Chemical Reaction s are often used to remove impurities of particular types. The use of Silicon and other Semiconductor s in Electronics is highly dependent on precise control of impurities, and a number of special techniques have been developed, such as Zone Refining . Types of materials that are usually refined: See also |