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公开(公告)号：US10138578B2
公开(公告)日：2018-11-27
申请号：US14900904
申请日：2014-06-27
申请人： TreeToTextile AB
发明人： Lars Stigsson , Bengt Hagström , Tobias Köhnke , Artur Hedlund , Marta Bialik
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.
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