Method for the production of alpha type calcium sulfate hemihydrate
    1.
    发明授权
    Method for the production of alpha type calcium sulfate hemihydrate 失效
    生产α型硫酸钙半水合物的方法

    公开(公告)号:US4091080A

    公开(公告)日:1978-05-23

    申请号:US732429

    申请日:1976-10-14

    CPC分类号: C01F11/466 C04B11/024

    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.

    摘要翻译: 通过将石膏悬浮在特定浓度的特定单羧酸盐的水溶液中并在大气压下在特定温度范围内加热得到的悬浮液,得到α型硫酸钙半水石膏。 通过向水溶液中加入特定的一元羧酸,将石膏悬浮在所得溶液中并在大气压下在特定温度范围内加热得到的悬浮液,以增加的速率实现了该α型硫酸钙半水合物的生产。