| 发明名称 |
Process for purifying gypsum |
| 摘要 |
<p>The invention relates to a process for purifying gypsum of heavy metal impurities and/or impurities of the lanthanide group by means of a strong-magnetic separation, and to the use of purified gypsum as a coating pigment and/or filler pigment in paper and as a building material.</p> |
| 申请公布号 |
FI101787(B1) |
申请公布日期 |
1998.08.31 |
| 申请号 |
FI19950005761 |
申请日期 |
1995.11.29 |
| 申请人 |
KEMIRA CHEMICALS OY;KEMIRA AGRO OY |
发明人 |
KARHUNEN, JUKKA;AEIJAELAE, HANNU;LEHTINEN, KARI;MYLLYLAE, VEIKKO |
| 分类号 |
B03C1/00;C01F11/46;C08K3/30;C22B7/00;(IPC1-7):C01F11/46 |
主分类号 |
B03C1/00 |
| 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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