发明名称 |
Dry reaction process of asbestos tailings and ammonium sulfate |
摘要 |
There is disclosed a dry process for preparing magnesium sulfate by heating one surface of a reaction mixture of asbestos tailings to a temperature of from 350 DEG to 400 DEG C. whereby there is provided a gradient temperature between the heated zone, an intermediate zone and the outside zone where the ammonium bisulfate formed can condense in one of the last two zones which are at a temperature lower than 250 DEG C. and react with ammonia to provide a new supply of ammonium sulfate for further reaction with the asbestos tailings and recovering the magnesium sulfate thus obtained.
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申请公布号 |
US4277449(A) |
申请公布日期 |
1981.07.07 |
申请号 |
US19790035267 |
申请日期 |
1979.05.01 |
申请人 |
SOCIETE NATIONALE DE L'AMINATE |
发明人 |
LALANCETTE, JEAN-MARC |
分类号 |
C01F5/40;(IPC1-7):C01F5/40 |
主分类号 |
C01F5/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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