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| View Original: | Man working with precipitator in pilot plant.jpg (4761x6057) | |||
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| Keywords: Man working with precipitator in pilot plant.jpg en Photograph of lower portion of the precipitator used in the pilot plant at the National Bureau of Standards for the extraction of alumina from clay The solution obtained from digestion of the clay in hydrochloric acid with insoluble silica removed enters a large tank lower center The contents of the tank are pumped to the top of a nine-foot tower the base of which is shown above the tank and then allowed to fall against a stream of hydrochloric acid gas entering at the bottom of the tower with resultant precipitation of aluminum as hydrated aluminum chloride 1947-05-01 National Institute of Standards and Technology National Institute of Standards and Technology The images in the Aluminum from Clay Photographic Collection are in the public domain and are not subject to copyright in the United States However please pay special attention to the individual works to make sure there are no copyright restrictions indicated Individual works may require securing other permissions from the original copyright holder Use of the images from NIST Digital Collections is not restricted but a statement of attribution is required Please use the following attribution statement National Institute of Standards and Technology Digital Collections Gaithersburg MD 20899 PD-USGov National Bureau of Standards National Institute of Standards and Technology Uploaded with UploadWizard | ||||
