File:AluminumFromClay 004.jpg
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Captions
Summary
[edit]DescriptionAluminumFromClay 004.jpg | The second step in the hydrochloric acid process for the production of alumina from clay as carried out in the pilot plant constructed at the National Bureau of Standards to test the process. The digester is shown, in which, after preliminary roasting, the clay is stirred with hot dilute hydrochloride acid until soluble material is dissolved. Thus the aluminum content is dissolved out as alumina, whereas the silicon remains as insoluble silica. | ||||
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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Licensing
[edit]Public domainPublic domainfalsefalse |
This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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current | 19:02, 6 March 2014 | 4,852 × 6,012 (1.75 MB) | NISTResearchLibrary (talk | contribs) |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Image title |
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Author | National Institute of Standards and Technology |
Copyright holder |
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Credit/Provider | National Institute of Standards and Technology |
Source | Aluminum from Clay Photograph Collection |
Short title |
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Date and time of data generation | 1 May 1947 |
Width | 4,852 px |
Height | 6,012 px |
Bits per component |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 600 dpi |
Vertical resolution | 600 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS5 Windows |
File change date and time | 15:54, 12 February 2013 |
Exif version | 2.21 |
Color space | Uncalibrated |
Image width | 4,852 px |
Image height | 6,012 px |
Original transmission location code | 16233-3 |
Copyright status | Copyright status not set |
Date metadata was last modified | 11:00, 12 February 2013 |
Date and time of digitizing | 02:41, 29 January 2013 |
Unique ID of original document | xmp.did:56BB4E4E5675E21197A3CF50644ABE3E |
Keywords |
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Contact information | library@nist.gov
100 Bureau Dr, MS 2500 Gaithersburg, MD, 20899 |
IIM version | 2 |