公开(公告)号：US20230146394A1

公开(公告)日：2023-05-11

申请号：US17909165

申请日：2021-03-21

申请人： Re: NewCell AB

发明人： Mikael LINDSTROM ,  Gunnar HENRIKSSON ,  Amy TRAN CARLSTROM ,  Kajsa FOUGNER ,  Lennart BÖRJESON ,  Lennart KÄLLÉN ,  Zaheer Ahmad MANSOOR ,  Tobias SJÖGREN ,  Tahani KALDÉUS

IPC分类号： D06M13/184 ,  D06M11/50 ,  D06M11/34

CPC分类号： D06M13/184 ,  D06M11/50 ,  D06M11/34 ,  D06M2101/06

摘要： There is provided a process for chemically pretreating reclaimed cellulose fibres to be used in the production of moulded bodies from regenerated cellulose, wherein the pretreatment includes one stage, in which stage acid metal removal and acid oxidative bleaching are carried out together. Advantages include that the propensity of the regenerated cellulose to clog when flowing in a tube and through a nozzle is reduced. This is believed to be an effect of an efficient metal removal. The need for additional bleaching steps and/or metal removing steps is reduced or even eliminated. A one-stage method is more efficient, faster and less costly compared to a multi-stage method according to the prior art. From an environmental perspective, acidic metal removal is preferred over removal by chelating agents such as EDTA.