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    Process for purifying an aqueous solution of N-methyl-morpholine N-oxide
    6.
    发明授权
    Process for purifying an aqueous solution of N-methyl-morpholine N-oxide 失效
    纯化N-甲基 - 吗啉N-氧化物水溶液的方法

    公开(公告)号：US5053138A

    公开(公告)日：1991-10-01

    申请号：US595562

    申请日：1990-10-11

    申请人： Dietmar Korger ,  Dieter Eichinger ,  Stephan Astegger ,  Karin Weinzierl ,  Johann Manner

    发明人： Dietmar Korger ,  Dieter Eichinger ,  Stephan Astegger ,  Karin Weinzierl ,  Johann Manner

    IPC分类号： B01D15/04 ,  B01J41/04 ,  D01F2/02 ,  D01F13/02

    CPC分类号： B01J41/043 ,  D01F13/02 ,  Y02P70/627

    摘要： There is disclosed a process for purifying aqueous solutions of N-methyl-morpholine N-oxide (NMMO), such as spinning bath solutions incurred in the production of cellulose products, in which process the solutions to be purified are contacted with an anion exchanger and the purified solutions are separated from the anion exchanger. The process is carried out in one step and the anion exchanger, as functional groups, exclusively contains quaternary tetraalkylammonium groups of the formulae--CH.sub.2 --N.sup..sym. (CH.sub.3).sub.3 X.sup..crclbar. or --CH.sub.2 --N.sup..sym. [(CH.sub.3).sub.2 (CH.sub.2 OH)]X.sup..crclbar.wherein X.sup..crclbar. represents the anion of an inorganic or organic acid. After this, the anion exchanger is regenerated with an aqueous acidic solution.

    摘要翻译： 公开了一种纯化N-甲基吗啉N-氧化物（NMMO）的水溶液的方法，例如在纤维素产物生产中产生的纺丝浴溶液，其中待纯化的溶液与阴离子交换剂接触， 将纯化的溶液与阴离子交换剂分离。 该方法在一个步骤中进行，阴离子交换剂作为官能团，仅包含式-CH 2 -N（+）（CH 3）3 X（ - ）或-CH 2 -N（+）[（CH 3））的季铵四烷基铵基团 ）2（CH 2 OH）] X（ - ）其中X（ - ）表示无机或有机酸的阴离子。 之后，用酸性水溶液再生阴离子交换剂。

    Process for the production of cellulose moulded bodies
    10.
    发明授权
    Process for the production of cellulose moulded bodies 失效
    生产纤维素成型体的方法

    公开(公告)号：US5766530A

    公开(公告)日：1998-06-16

    申请号：US471842

    申请日：1995-06-06

    申请人： Wolfram Kalt ,  Johann Manner ,  Arnold Nigsch ,  Heinrich Firgo ,  Christian Hager ,  Wolfgang Helmut Schkorwaga

    发明人： Wolfram Kalt ,  Johann Manner ,  Arnold Nigsch ,  Heinrich Firgo ,  Christian Hager ,  Wolfgang Helmut Schkorwaga

    IPC分类号： D01D4/02 ,  D01F2/00 ,  B29C47/00

    CPC分类号： D01F2/00

    摘要： The invention is concerned with a process for the production of cellulose moulded bodies wherein a suspension of cellulose in an aqueous solution of a tertiary amine-oxide is transformed into a mouldable solution, said solution being extruded by means of a forming tool and conducted into a precipitation bath. The process is characterized in that at least part of the materials in devices and pipes for the transportation and processing of the solution, which material is in contact with the mouldable solution contains at a minimum of 90% up to a depth of at least 0,5 .mu.m, preferably more than 1 .mu.m, at least one element of the group consisting of titanium, zirconium, chromium and nickel in elementary form and/or in the form of compounds provided that the remaining of the material does not contain any of the elements of the group consisting of copper, molybdenum, tungsten or cobalt. By means of the use of certain elements and compounds according to the invention, it is possible to control the occurrence and the extent of exothermal degradation reactions in the cellulose solution.

    摘要翻译： 本发明涉及生产纤维素模塑体的方法，其中将纤维素在叔胺氧化物的水溶液中的悬浮液转化成可模制的溶液，所述溶液通过成形工具挤出并进入 沉淀浴 该方法的特征在于，用于运输和处理溶液的装置和管道中的至少一部分材料，该材料与可成型溶液接触，包含至少90％，至少为0的深度， 5微米，优选大于1微米，元素形式和/或化合物形式的钛，锆，铬和镍中的至少一种元素，条件是剩余的材料不含任何 由铜，钼，钨或钴组成的组元素。 通过使用根据本发明的某些元素和化合物，可以控制纤维素溶液中放热降解反应的发生和程度。