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Sublimation is the process of changing of any substance (usually on heating) from a solid to a gas (or from gas to a solid) without passing through liquid phase. In terms of purification - material is heated, often under vacuum, and the vapors of the material are then condensed back to a solid on a cooler surface.
The RCA clean is a standard set of wafer cleaning steps which need to be performed before high-temperature processing steps (oxidation, diffusion, CVD) of silicon wafers in semiconductor manufacturing. Werner Kern developed the basic procedure in 1965 while working for RCA, the Radio Corporation of America.
Separation and Purification Technology is a peer-reviewed scientific journal published by Elsevier, covering methods for separation and purification in chemical and environmental engineering, including research on the separation and purification of liquids, vapors, and gases, as well as carbon capture and separation, excluding methods intended for analytical purposes, soil science, polymer ...
Reverse osmosis (RO) is a water purification process that uses a semi-permeable membrane to separate water molecules from other substances. RO applies pressure to overcome osmotic pressure that favors even distributions.
Historically, it was the de facto standard for highly purified laboratory water for biochemistry and used in laboratory trace analysis until combination purification methods of water purification became widespread. [citation needed]
Water purification is the process of removing undesirable chemicals, ... Lyster's method remained the standard for U.S. ground forces in the field and in camps ...
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