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    • 3. 发明授权
    • Process for preparing alpha calcium sulfate hemihydrate
    • 制备α硫酸钙半水合物的方法
    • US07700066B1
    • 2010-04-20
    • US12245644
    • 2008-10-03
    • Jen-Chang YangHong-Da WuNai-Chia TengSheng-Yang Lee
    • Jen-Chang YangHong-Da WuNai-Chia TengSheng-Yang Lee
    • C01B17/96C01F11/46
    • C01F11/46
    • 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
    • 本发明提供了一种制备α-硫酸钙半水合物的方法,包括以下步骤:将含有硫酸根离子和钙离子的水溶液加入到浓度范围的氯化钙溶液中; 使a)的混合物在一定温度范围内反应适当的时间; 过滤和洗涤b)的反应产物与上升溶剂分离固相和液相; 和d)收集和干燥固相以获得高纯度的α-硫酸钙半水合物; 其中氯化钙浓度范围(y)与反应温度(x)的范围之间的关系如下式所示:-0.4x5 + 7.33x4-52.83x3 + 187.17x2-328.27x + 316 < y <1.2x5-22x4 + 158.5x3-561.5x2 + 984.8x-588(2
    • 6. 发明申请
    • Process for Preparing alpha Calcium Sulfate Hemihydrate
    • 制备α硫酸钙半水合物的方法
    • US20100086474A1
    • 2010-04-08
    • US12245644
    • 2008-10-03
    • Jen-Chang YangHong-Da WuNai-Chia TengSheng-Yang Lee
    • Jen-Chang YangHong-Da WuNai-Chia TengSheng-Yang Lee
    • C01F11/46
    • C01F11/46
    • 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
    • 本发明提供了一种制备α-硫酸钙半水合物的方法,包括以下步骤:将含有硫酸根离子和钙离子的水溶液加入到浓度范围的氯化钙溶液中; 使a)的混合物在一定温度范围内反应适当的时间; 过滤和洗涤b)的反应产物与上升溶剂分离固相和液相; 和d)收集和干燥固相以获得高纯度的α-硫酸钙半水合物; 其中氯化钙浓度范围(y)与反应温度(x)的范围之间的关系如下式所示:-0.4x5 + 7.33x4-52.83x3 + 187.17x2-328.27x + 316 < y <1.2x5-22x4 + 158.5x3-561.5x2 + 984.8x-588(2