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  2. List of purification methods in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_purification...

    Refining is used primarily in the petroleum industry, whereby crude oil is heated and separated into stages according to the condensation points of the various elements. Distillation, widely used in petroleum refining and in purification of ethanol separates volatile liquids on the basis of their relative volatilities. There are several type of ...

  3. Iodine value - Wikipedia

    en.wikipedia.org/wiki/Iodine_value

    Such a triglyceride has a high iodine value (approx. 119). Below, the reaction product after the addition of four equivalents of iodine or bromine to the four C=C double bonds of the unsaturated fatty acid residues. The determination of iodine value is a particular example of iodometry. A solution of iodine I 2 is yellow/brown in color.

  4. Food-grade lubricant - Wikipedia

    en.wikipedia.org/wiki/Food-grade_lubricant

    There is a 10 parts per million (ppm) limit for lubricant base oils (e.g., mineral oil) that can be present in food if incidental contact occurs. To get new food contact substances (FCSs) approved by the FDA, manufacturers must either submit a Food Contact Notification (FCN) filing or apply for a Threshold of Regulation (TOR) exemption.

  5. Oil purification - Wikipedia

    en.wikipedia.org/wiki/Oil_Purification

    Oil filtration systems generally use a multistage filtration with coarse and fine filters. [2] Centrifugation is separation of oil and water, or oil and solid particles by centrifugal forces. Vacuum treatment degasses and dehydrates industrial oil. This method is well suited for removing dispersed and dissolved water, as well as dissolved gases ...

  6. Portable water purification - Wikipedia

    en.wikipedia.org/wiki/Portable_water_purification

    Carrying iodine for water purification is an imperfect but lightweight solution for those in need of field purification of drinking water. Kits are available in camping stores that include an iodine pill and a second pill (vitamin C or ascorbic acid) that will remove the iodine taste from the water after it has been disinfected. The addition of ...

  7. Iodine - Wikipedia

    en.wikipedia.org/wiki/Iodine

    This is an accepted version of this page This is the latest accepted revision, reviewed on 10 February 2025. This article is about the chemical element. For other uses, see Iodine (disambiguation). Chemical element with atomic number 53 (I) Iodine, 53 I Iodine Pronunciation / ˈ aɪ ə d aɪ n, - d ɪ n, - d iː n / (EYE -ə-dyne, -⁠din, -⁠deen) Appearance lustrous metallic gray solid ...

  8. Iodophor - Wikipedia

    en.wikipedia.org/wiki/Iodophor

    Medical iodophor (Chinese povidone-iodine solution) An iodophor is a preparation containing iodine complexed with a solubilizing agent, such as a surfactant or water-soluble polymers such as povidone (forming povidone-iodine), [1] [2] The result is a water-soluble material that releases free iodine when in solution.

  9. Ion exchange - Wikipedia

    en.wikipedia.org/wiki/Ion_exchange

    Ion exchange is widely used in the food and beverage industry, hydrometallurgy, metals finishing, chemical, petrochemical, pharmaceutical technology, sugar and sweetener production, ground- and potable-water treatment, nuclear, softening, industrial water treatment, semiconductor, power, and many other industries. [citation needed]