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    • 24. 发明授权
    • Method and device for continually producing an extrusion solution
    • 用于连续生产挤出溶液的方法和装置
    • US06972102B1
    • 2005-12-06
    • US10088773
    • 2000-09-29
    • Ralf-Uwe BauerUwe Kind
    • Ralf-Uwe BauerUwe Kind
    • C08B1/00D01D1/02D01F2/00C08J5/18
    • D01D1/02C08B1/003D01F2/00
    • The invention relates to a method for continually producing an extrusion solution for producing cellulosed shaped bodies, such as fibres and films, according to the lyocell method. According to the inventive method, (a) a cellulose suspension is produced from cellulose and an aqueous phase in a mass ratio ranging from 1:3 to 1:40, whereby shearing is maintained for between 5 to 200 minutes. (b) The cellulose suspension is dewatered to form a material having a cellulose content ranging from 20 to 80 mass % and the aqueous phase produced thereby is at least partially returned to step (a). (c) The humid cellulose material being homogenised is transported through a first shearing zone in the absence of N-methylmorpholine-N-oxide. (d) The cellulose material is transported through a second shearing zone after sufficient aqueous N-Methyl-morpholine-N-oxide has been added to the homogenised cellulose material so that, after mixing, a suspension having a N-Methylmorpholine-N-oxide content ranging from 70 to 80 mass % in the liquid phase is obtained. The cellulose material or the suspension completely fills in the available cross-section of transport in the shearing zones and (e) the produced cellulose suspension being sheared is converted into the extrusion solution in aqueous N-Methylmorpholine-N-oxide, whereby water evaporates.
    • 本发明涉及根据lyocell法连续生产纤维素成形体如纤维和薄膜的挤出溶液的方法。 根据本发明的方法,(a)由纤维素和水相以1:3至1:40的质量比产生纤维素悬浮液,由此剪切保持5至200分钟。 (b)将纤维素悬浮液脱水,形成纤维素含量为20〜80质量%的材料,由此制造的水相至少部分返回到工序(a)。 (c)均匀化的潮湿纤维素材料在没有N-甲基吗啉-N-氧化物的情况下通过第一剪切区输送。 (d)在均匀化的纤维素材料中加入足够的N-甲基吗啉-N-氧化物水溶液之后,将纤维素材料输送通过第二剪切区,使混合后得到具有N-甲基吗啉-N-氧化物 得到在液相中含量为70〜80质量%的含量。 纤维素材料或悬浮液完全填充剪切区域中可用的输送横截面,(e)将所生产的被剪切的纤维素悬浮液转化成N-甲基吗啉-N-氧化物水溶液的挤出溶液,由此水蒸发。