Preparation of solutions for use in photography
    2.
    发明授权
    Preparation of solutions for use in photography 失效
    准备用于摄影的解决方案

    公开(公告)号:US5472835A

    公开(公告)日:1995-12-05

    申请号:US263101

    申请日:1994-06-21

    摘要: The present invention is a process for continuous preparation of solutions of water-immiscible or water-insoluble organic compounds in substantially non-aqueous organic solvents. Particularly, a process for the continuous preparation of colour forming coupler solutions for use in the photographic industry is described. The process uses a twin screw extruder wherein the compound to be dissolved is introduced into a first section of the extruder. The compound passes along the extruder interior to a section where organic solvent is introduced to form the required solution.

    摘要翻译: 本发明是在基本上非水有机溶剂中连续制备水不混溶或水不溶性有机化合物的溶液的方法。 特别地,描述了用于连续制备用于照相工业中的成色成色剂溶液的方法。 该方法使用双螺杆挤出机,其中待溶解的化合物被引入挤出机的第一部分。 化合物沿着挤出机内部通过引入有机溶剂以形成所需溶液的部分。