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  2. Desalination - Wikipedia

    en.wikipedia.org/wiki/Desalination

    Freezethaw desalination (or freezing desalination) uses freezing to remove fresh water from salt water. Salt water is sprayed during freezing conditions into a pad where an ice-pile builds up. When seasonal conditions warm, naturally desalinated melt water is recovered. This technique relies on extended periods of natural sub-freezing ...

  3. Fractional freezing - Wikipedia

    en.wikipedia.org/wiki/Fractional_freezing

    Fractional freezing is a process used in process engineering and chemistry to separate substances with different melting points. It can be done by partial melting of a solid, for example in zone refining of silicon or metals, or by partial crystallization of a liquid, as in freeze distillation, also called normal freezing or progressive freezing.

  4. Freezing - Wikipedia

    en.wikipedia.org/wiki/Freezing

    Most liquids freeze by crystallization, formation of crystalline solid from the uniform liquid. This is a first-order thermodynamic phase transition, which means that as long as solid and liquid coexist, the temperature of the whole system remains very nearly equal to the melting point due to the slow removal of heat when in contact with air, which is a poor heat conductor.

  5. Degassing - Wikipedia

    en.wikipedia.org/wiki/Degassing

    The solubility of gas obeys Henry's law, that is, the amount of a dissolved gas in a liquid is proportional to its partial pressure.Therefore, placing a solution under reduced pressure makes the dissolved gas less soluble.

  6. Directional freezing - Wikipedia

    en.wikipedia.org/wiki/Directional_freezing

    Directional freezing can freeze water, from only one direction or side of a container, into clear ice. [ 1 ] [ 2 ] [ 3 ] Directional freezing in a domestic freezer can be done by putting water in a insulated container so that the water freezes from the top down, and removing before fully frozen, so that the minerals in the water are not frozen.

  7. Freeze and thaw action - Wikipedia

    en.wikipedia.org/?title=Freeze_and_thaw_action&...

    Pages for logged out editors learn more. Contributions; Talk; Freeze and thaw action

  8. Freezing-point depression - Wikipedia

    en.wikipedia.org/wiki/Freezing-point_depression

    In the above equation, T F is the normal freezing point of the pure solvent (273 K for water, for example); a liq is the activity of the solvent in the solution (water activity for aqueous solution); ΔH fus T F is the enthalpy change of fusion of the pure solvent at T F, which is 333.6 J/g for water at 273 K; ΔC fus p is the difference ...

  9. Freeze-thaw - Wikipedia

    en.wikipedia.org/?title=Freeze-thaw&redirect=no

    This page was last edited on 10 August 2010, at 13:01 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...