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FILTRATION AND CONCENTRATION
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acid agglomerates aqueous extract aroma fraction atmosphere batch belt brew bulk density caffeine carbon dioxide centrifuge coffee beans coffee extract coffee grounds coffee oil coffee particles color column condenser constituents containing controlled cooling decaffeinated desired dried coffee dryer drying chamber employed eutectic eutectic point extraction liquor extractor film flavor and aroma flow foam fractionating column freeze drying frozen extract gases green coffee ground coffee ground roasted coffee heat exchanger hydrolysis ice crystals inch inert gas informotion instant coffee liquid extract material mesh method microns minutes mixture moisture content nitrogen nozzle obtained operation oxidation oxygen passed percolator pipe poges portion preferably pressure prior psig pump removed result roasted and ground screen separated soluble coffee solids soluble solids solution solvent spray drying steam distillate step substantially surface tank temperature tion tower U.S. Patent vacuum valve vapor volatile aromas volatile flavor weight zone