发明名称 |
Method for the production of alpha type calcium sulfate hemihydrate |
摘要 |
Alpha type calcium sulfate hemihydrate gypsum is obtained by suspending gypsum in an aqueous solution containing a specific monocarboxylate in a specific concentration and heating the resultant suspension in a specific temperature range under atmospheric pressure. The production of this alpha type calcium sulfate hemihydrate is accomplished at an increased rate by adding a specific monocarboxylic acid to the aqueous solution, suspending gypsum in the resultant solution and heating the resultant suspension in a specific temperature range under atmospheric pressure.
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申请公布号 |
US4091080(A) |
申请公布日期 |
1978.05.23 |
申请号 |
US19760732429 |
申请日期 |
1976.10.14 |
申请人 |
KUREHA KAGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
KOSUGI, JYUNITI;KUDO, YOSHIHIKO;TAGAYA, KIYOSHI |
分类号 |
C01F11/46;C04B11/024;(IPC1-7):C01F11/46;B01J17/00 |
主分类号 |
C01F11/46 |
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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