| 发明名称 |
Gypsum from wet phosphoric acid process - having a low fluosilicate content |
| 摘要 |
<p>In a wet phosphoric acid process the gpysum formed is rendered suitable for further use by with a warm soln. of an alkaline fluorsilicate (satd. in the cold), the washings after cooling and removal of fluosilicate, being recycled. The washing is carried out at 70-100 degrees C and crystallisation at 10-30 degrees C.</p> |
| 申请公布号 |
DE2208049(A1) |
申请公布日期 |
1972.08.30 |
| 申请号 |
DE19722208049 |
申请日期 |
1972.02.21 |
| 申请人 |
GEBR. KNAUF, WESTDEUTSCHE GIPSWERKE, 8715 IPHOFEN |
发明人 |
SCHEEL, KURT C., DIPL.-CHEM., 2000 HAMBURG |
| 分类号 |
C01B33/10;C01F11/46;(IPC1-7):01B25/22 |
主分类号 |
C01B33/10 |
| 代理机构 |
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代理人 |
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