ALKALI RECYCLE IN CELLULOSE SPINNING PROCESS
    1.
    发明申请
    ALKALI RECYCLE IN CELLULOSE SPINNING PROCESS 审中-公开
    纤维素纺丝工艺中的碱性回收

    公开(公告)号:US20160138200A1

    公开(公告)日:2016-05-19

    申请号:US14900904

    申请日:2014-06-27

    申请人: IHK FIBRE AB

    IPC分类号: D01F13/02 C01D1/28 C08B16/00

    摘要: The present invention concerns a method for the recovery of solvent in a process for preparation of regenerated cellulosic fibers using sodium hydroxide as solvent for cellulose dissolving in the manufacturing of a cellulose spinning dope wherein sodium hydroxide present in the spinning dope is at least partially recovered and recycled as sodium hydroxide from a cellulose fiber regeneration or cellulose coagulation step and wherein said cellulose fiber regeneration or cellulose coagulation step consists of a bath into which cellulose spinning dope is injected. Recovered sodium hydroxide may be directly or indirectly recycled from a cellulose fiber regeneration or cellulose coagulation step to a cellulose dissolving step.

    摘要翻译: 本发明涉及一种在制备再生纤维素纤维的方法中回收溶剂的方法,该方法使用氢氧化钠作为纤维素溶剂的溶剂来溶解制备纤维素纺丝原液,其中存在于纺丝原液中的氢氧化钠至少部分回收, 从纤维素纤维再生或纤维素凝固步骤循环使用氢氧化钠,其中所述纤维素纤维再生或纤维素凝固步骤由注入纤维素纺丝原液的浴组成。 回收的氢氧化钠可以直接或间接地从纤维素纤维再生或纤维素凝结步骤再循环到纤维素溶解步骤。