Method for integrated production of magnesium sulfate, magnesium carbonate and magnesium hydroxide from magnesite |
Title： |
| Method for integrated production of magnesium sulfate, magnesium carbonate and magnesium hydroxide from magnesite |
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Application Number： |
02130915 |
Application Date： |
2002/09/13 |
Announcement Date： |
2003/03/12 |
Pub. Date： |
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Publication Number： |
1401573 |
Announcement Number： |
1212271 |
Grant Date： |
2005-7-27 |
Granted Pub. Date： |
2005-7-27 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C01F 5/00, C01F 5/40, C01F 5/24, C01F 5/14, C04B 2/10 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Zhu Guocai, Meng Guangzhou, Yuan Shaogang |
Key Words： |
integrated production, magnesium sulfate, magnesium carbonate, magnesium hydroxide,magnesite |
Abstract： |
A process for preparing magnesium sulfate, magnesium carbonate and magnesium hydroxide from magnesite includes reaction of light-burned magnesium oxide powder obtained by calcining magnesite, the solution of ammonium sulfate as the by-product obtained by reaction with magnesium carbonate and magnesium hydroxide precipitate and industrial concentrated sulfuric acid, evaporating ammonia gas, dissolving in water, depositing to obtain magnesium hydroxide, controlling acidity and temp. filtering to remove impurities, cooling crystallizing to obtain magnesium sulfate heptahydrate, diluting the mother liquid, preparing alkaline magnetic carbonate by ammonium hydrogen carbonate method, and sulfuric acid absorption to residual ammonia water to obtain ammonium sulfate as by-product. Its advantage is no generation of gas and liquid pollutants. |
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 Relevancy information |
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| Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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