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1. 发明申请

US20170014771A1 PURIFICATION PROCESS FOR PARTLY-HYDROLYZED CELLULOSE 有权
标题翻译：部分水解纤维素的净化过程
公开(公告)号：US20170014771A1
公开(公告)日：2017-01-19
申请号：US15122027
申请日：2014-02-28
申请人： NORAM Engineering and Constructors Ltd.
发明人： James M. Lockhart , Peter G. Symons , J. David Genders
IPC分类号： B01D61/42
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：使用电渗析从包含凝聚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，以及将纯化的部分水解的纤维素颗粒进行电渗析的第二步骤。

2. 发明申请

US20150252531A1 PROCESS FOR MAKING PARTLY-HYDROLYZED CELLULOSE USING COMPRESSED CELLULOSIC MATERIALS 审中-公开
标题翻译：使用压缩纤维素材料制备部分水解纤维素的方法
公开(公告)号：US20150252531A1
公开(公告)日：2015-09-10
申请号：US14429953
申请日：2012-09-20
申请人： NORAM ENGINEERING AND CONSTRUCTORS LTD.
发明人： James M. Lockhart , James T. Wearing , Ali Gulamhusein , Evan J. Hobenshield , Durk Devries
IPC分类号： D21H17/65 , D21F7/08 , D21D5/00 , D21H11/04
摘要： A method and apparatus for contacting and reacting fine cellulosic material with acid to produce partly-hydrolyzed cellulose, in which the cellulose is compressed to form higher density material, resulting in reduced consumption of acid and increased uniformity of reaction times. Cellulosic material, such as ground wood pulp, is compressed to reduce the interstitial spaces therein. The compressed material is contacted with an acid, such as sulfuric acid, which is allowed to wick into the interstitial spaces and react with the cellulose to produce partly-hydrolyzed cellulose.
摘要翻译：一种使精细纤维素材料与酸接触和反应以产生部分水解的纤维素的方法和装置，其中纤维素被压缩以形成较高密度的材料，导致酸的消耗减少并且反应时间的均匀性增加。纤维素材料如磨木浆被压缩以减少其中的间隙空间。将压缩的材料与酸（如硫酸）接触，硫酸可以吸附到间隙中并与纤维素反应以产生部分水解的纤维素。

3. 发明授权

US10016726B2 Purification process for partly-hydrolyzed cellulose 有权
公开(公告)号：US10016726B2
公开(公告)日：2018-07-10
申请号：US15122027
申请日：2014-02-28
申请人： NORAM Engineering and Constructors Ltd.
发明人： James M. Lockhart , Peter G. Symons , J. David Genders
IPC分类号： B01D61/42
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.

4. 发明授权

US10697122B2 Process for making partly-hydrolyzed cellulose using compressed cellulosic materials 有权
公开(公告)号：US10697122B2
公开(公告)日：2020-06-30
申请号：US14429953
申请日：2012-09-20
申请人： NORAM Engineering and Constructors Ltd.
发明人： James M. Lockhart , James T. Wearing , Ali Gulamhusein , Evan J. Hobenshield , Durk Devries
IPC分类号： D21H17/65 , D21C9/00 , D21D5/00 , D21F7/08 , D21H11/04
摘要： A method and apparatus for contacting and reacting fine cellulosic material with acid to produce partly-hydrolyzed cellulose, in which the cellulose is compressed to form higher density material, resulting in reduced consumption of acid and increased uniformity of reaction times. Cellulosic material, such as ground wood pulp, is compressed to reduce the interstitial spaces therein. The compressed material is contacted with an acid, such as sulfuric acid, which is allowed to wick into the interstitial spaces and react with the cellulose to produce partly-hydrolyzed cellulose.

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