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Machinery & Equipment Company offers a wide selection of used process columns designed for separation, purification, and recovery applications across chemical, pharmaceutical, food processing, and petrochemical industries. Available equipment includes distillation columns, reflux columns, packed columns, sieve tray columns, and ion exchange columns constructed from carbon steel, stainless steel, and glass-lined materials. Manufacturers commonly found in this category include Pfaudler, De Dietrich, Koch-Glitsch, Sulzer Chemtech, Raschig, SRS Engineering, L.A. Boiler Works, and Springs Fabrication. Process columns are widely used for operations such as solvent recovery, methanol recovery, distillation, chemical reaction processing, and resin filtration where efficient separation and controlled mass transfer are required.