Method of producing aqueous solution of slaked lime and apparatus therefor
    68.
    发明公开
    Method of producing aqueous solution of slaked lime and apparatus therefor 失效
    生产水溶液的水溶液及其设备的方法

    公开(公告)号:EP0510675A3

    公开(公告)日:1993-04-21

    申请号:EP92107040.5

    申请日:1992-04-24

    IPC分类号: C04B2/08 B01F7/16

    摘要: A method of producing an aqueous solution of slaked lime is disclosed the steps of which includes introducing water into a slaked lime-dissolving apparatus comprising a dissolving tank (1), a water supply piping (2) connected to a lower part of the tank, a stirring blade (3) disposed within the tank in its bottom part, an effluent piping (6) connected to an upper part of the tank for discharging aqueous slaked lime solution, and a fluidized slaked lime layer height-control device (5) disposed within the tank above the stirring blade, subsequently introducing a predetermined amount of slaked lime into the tank, feeding water, with low-speed stirring, to the tank from the water supply piping in such a rate that the water in the cylindrical or rectangular upper part of the tank ascends at a rate of from 0.25 to 1.2 mm/sec, and taking out an aqueous solution of slaked lime from the tank through the effluent piping.

    Process for production of poly(arylene thioether) copolymer
    70.
    发明公开
    Process for production of poly(arylene thioether) copolymer 失效
    生产聚(亚乙基三乙氧基)共聚物的方法

    公开(公告)号:EP0494518A3

    公开(公告)日:1993-01-07

    申请号:EP91311588.7

    申请日:1991-12-12

    IPC分类号: C08G75/02

    CPC分类号: C08G75/0218

    摘要: Disclosed herein is a process for the production of a granular poly(arylene thioether) copolymer by polymerizing an alkali metal sulfide with dihalo-aromatic compounds including at least one dihalo-aromatic carboxylic acid in a polar solvent containing water. Upon the polymerization, at least a part of the dihalo-aromatic carboxylic acid is converted into an alkaline earth metal salt in advance, the hydroxide and/or oxide of an alkaline earth metal is added together with the dihalo-aromatic carboxylic acid to the polymerization reaction system, or the hydroxide and/or oxide of an alkaline earth metal is added together with an alkaline earth metal salt of the dihalo-aromatic carboxylic acid and the dihalo-aromatic carboxylic acid to the polymerization reaction system.