发明名称 |
Process for preparing alpha calcium sulfate hemihydrate |
摘要 |
The invention provides a process for preparing α-calcium sulfate hemihydrate which comprises the following steps: adding aqueous solutions containing sulfate ions and calcium ions to calcium chloride solution with a range of concentration; reacting the mixture of a) at a range of temperature for an appropriate time; filtering and washing the reaction products of b) with a rising solvent to isolate the solid and liquid phases; and d) collecting and drying the solid phase to obtain α-calcium sulfate hemihydrate with high purity; wherein the relationship between the range of the concentration of calcium chloride (y) and the range of the reaction temperature (x) is shown as the following formula: −0.4x5+7.33x4−52.83x3+187.17x2−328.27x+316<y<1.2x5−22x4+158.5x3−561.5x2+984.8x−588 (2<X<5).
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申请公布号 |
US7700066(B1) |
申请公布日期 |
2010.04.20 |
申请号 |
US20080245644 |
申请日期 |
2008.10.03 |
申请人 |
TAIPEI MEDICAL UNIVERSITY |
发明人 |
YANG JEN-CHANG;WU HONG-DA;TENG NAI-CHIA;LEE SHENG-YANG |
分类号 |
C01B17/96;C01F11/46 |
主分类号 |
C01B17/96 |
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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