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1. 发明公开

EP3110534A1 PURIFICATION PROCESS FOR PARTLY-HYDROLYZED CELLULOSE 有权
标题翻译：复合纤维素纤维素纤维素
公开(公告)号：EP3110534A1
公开(公告)日：2017-01-04
申请号：EP14884237.0
申请日：2014-02-28
申请人： Noram Engineering and Constructors Ltd
发明人： LOCKHART, James M. , SYMONS, Peter G. , GENDERS, J. David
IPC分类号： B01D61/42 , D21D5/00
CPC分类号： B01D61/422
摘要： A method of recovering purified partly-hydrolyzed cellulose particles from a composition comprising agglomerated partly-hydrolyzed cellulose particles and an acid, using electrodialysis. The invention addresses the problem of reducing the acid to very low levels while avoiding the high capital and operating costs, high water usage and large filtration surface area or dilution time requirements of the prior art processes. Following dilution, concentration by centrifuging or settling, and/or dialysis of the composition, the composition is treated in an electrodialysis cell to remove ions, such as free sulfate from sulfuric acid. The method may include having an anion exchange resin in the feed compartment of the electrodialysis cell, adding a base to the receiving solution in the electrodialysis cell, and a second step of electrodialysis of the purified partly-hydrolyzed cellulose particles.
摘要翻译：一种使用电渗析从包含聚集的部分水解的纤维素颗粒和酸的组合物中回收纯化的部分水解的纤维素颗粒的方法。本发明解决了将酸降低至非常低水平的问题，同时避免了现有技术方法的高资本和操作成本，高的用水量和大的过滤表面积或稀释时间要求。稀释后，通过离心或沉降浓缩和/或组合物的透析，组合物在电渗析池中处理以从硫酸中除去离子，例如游离硫酸盐。该方法可以包括在电渗析池的进料室中具有阴离子交换树脂，向电渗析池中的接收溶液添加碱，以及对纯化的部分水解的纤维素颗粒进行电渗析的第二步骤。

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