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Source page: |
http://commons.wikimedia.org/wiki/File:AluminumFromClay_003.jpg |
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Summaryedit
Description |
After all soluble material in the clay has been dissolved in hydrochloric acid, the insoluble material, largely silica sludge, is removed in the filter press (above). The filter cake is blown dry with compressed air and washed with water. The acid filtrate and washings are then evaporated in a still to smaller volume, so that less hydrochloric acid gas will be required for eventual precipitation of hte aluminim as the hydrated chloride. Note the glass piping (upper right) used because of the corrosive effect of acid vapors on metal. The hydrochloric acid process for the production of alumina from was developed at the National Bureau of Standards during the war, when bauxite imports were cut off and it became necessary to utilize domestic sources of aluminum. |
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Date | 5/1/1947 | |||
Source | National Institute of Standards and Technology | |||
Author | National Institute of Standards and Technology | |||
Permission (Reusing this file) |
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Licensingedit
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use. |
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EXIF data: | |
File name | aluminumfromclay_003.jpg |
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Size, Mbytes | 1.7983642578125 |
Mime type | image/jpeg |
Orientation of image | 1 |
Image resolution in width direction | 600 |
Image resolution in height direction | 600 |
Unit of X and Y resolution | 2 |
Exif version | 0221 |
Color space information | 65535 |
Exif image width | 4837 |
Exif image length | 5937 |
Software used | Adobe Photoshop CS5 Windows |
Copyright holder | This is the copyright info. |
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