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1.发明授权Process for making cellulose ethers having reduced yellowing and discoloration 有权制备纤维素醚的方法，其具有减少的变黄和变色公开(公告)号：US06306333B1
公开(公告)日：2001-10-23
申请号：US09416783
申请日：1999-10-13
IPC分类号： B29C4114
摘要： A process for making a low molecular weight cellulose ether has the following steps: a) providing a high molecular weight cellulose ether; b) contacting it with acid to partially depolymerize it to a cellulose ether of a viscosity of about 100 cP or less; c) neutralizing the acid; d) repeating steps a)-c) to produce two or more discrete product batches of low molecular weight cellulose ether and produce at least one discrete product batch which is partially neutralized; and e) blending the two or more discrete product batches to form a combined product batch of low molecular weight cellulose ether of a pH of 4 to 6.8. The process provides a cellulose ether with reduced yellowing and discoloration.
摘要翻译： 制备低分子量纤维素醚的方法具有以下步骤：a）提供高分子量纤维素醚; b）使其与酸接触以将其部分解聚为粘度为约100cP或更低的纤维素醚; c）中和酸; d）重复步骤a）-c）以产生两个或更多个分散的低分子量纤维素醚的分批产物，并产生部分中和的至少一个离散产物批料; 和e）混合两个或更多个离散的产物批次以形成pH为4至6.8的低分子量纤维素醚的组合产品批料。 该方法提供了具有减少黄变和变色的纤维素醚。
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2.发明授权Removal of undesirable material from water-soluble cellulose ether aqueous solutions 失效从水溶性纤维素醚水溶液中除去不需要的物质
公开(公告)号：US5218107A
公开(公告)日：1993-06-08
申请号：US814525
申请日：1991-12-30
申请人： Gary J. Schulz
发明人： Gary J. Schulz
IPC分类号： C08B11/20
CPC分类号： C08B11/20
摘要： This invention is a process of removing water-soluble impurities from a water-soluble cellulose ether aqueous solution containing such water-soluble impurities comprising treating an aqueous solution comprising a water-soluble cellulose ether and a water-soluble impurity by means of ultrafiltration and diafiltration at conditions effective to produce a treated aqueous solution having a reduced concentration of the water-soluble impurity and an increased concentration of the water-soluble cellulose ether.
摘要翻译： 本发明是从含有这种水溶性杂质的水溶性纤维素醚水溶液中除去水溶性杂质的方法，包括通过超滤和渗滤处理包含水溶性纤维素醚和水溶性杂质的水溶液 在有效产生水溶性杂质浓度降低和水溶性纤维素醚浓度增加的条件下。
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3.发明授权
公开(公告)号：US5674999A
公开(公告)日：1997-10-07
申请号：US574066
申请日：1995-12-18
CPC分类号： C08B15/10 , C08B11/20 , C08B15/005
摘要： An improved process for surface treating water soluble cellulosic polymers with crosslinking agents to provide products which are more readily dispersible in cold water, and have longer viscosity delay times than can be achieved with polymers treated in low intensity mixers, such as ribbon blenders, comprising distributing the crosslinking agent using a continuous, high intensity mixer, followed by heating to facilitate surface crosslinking. This process also allows for a reduced level of crosslinking chemicals to be used.
摘要翻译： 一种改进的用交联剂表面处理水溶性纤维素聚合物的方法，以提供更容易在冷水中分散的产物，并且具有比用低强度混合器（例如带式搅拌机）处理的聚合物可以获得的粘度延迟时间更长的粘合延迟时间，其包括分布 交联剂使用连续的高强度混合器，然后加热以促进表面交联。 该方法还允许使用降低量的交联化学品。
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公开(公告)号：US4820813A
公开(公告)日：1989-04-11
申请号：US155399
申请日：1988-02-12
申请人： Gary J. Schulz
发明人： Gary J. Schulz
CPC分类号： C08J3/12 , C08B11/20 , C08J3/122 , C08J2301/26
摘要： High viscosity cellulose ether products are produced by grinding a substantially dry high molecular weight cellulose ether under conditions of mild mechanical impact such as those encountered in a high speed air swept impact mill. It has been found that such a cellulose ether product has several times the intrinsic viscosity of a product of substantially equivalent particle size by ball mill or hammer mill grinding.
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5.发明授权Palatable cholestyramine granules, tablets and methods for preparation thereof 失效可口的考来烯胺颗粒，片剂及其制备方法
公开(公告)号：US5167965A
公开(公告)日：1992-12-01
申请号：US521797
申请日：1990-05-10
申请人： Gary J. Schulz
发明人： Gary J. Schulz
IPC分类号： A61K9/16 , A61K9/20 , A61K31/785
CPC分类号： A61K31/785 , A61K9/1652 , A61K9/2054
摘要： Palatable cholestyramine granules, tablets and method for preparation thereof are disclosed.
摘要翻译： 公开了可口的考来烯胺颗粒，片剂及其制备方法。
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6.发明授权
公开(公告)号：US4988807A
公开(公告)日：1991-01-29
申请号：US506724
申请日：1990-04-09
CPC分类号： A61K9/2866 , C08B11/20 , C08B37/0003 , Y10S210/917
摘要： A method of removing undesirable material from water-soluble polysaccharide ethers, such as water-soluble cellulose ethers, via contact of an aqueous solution of the water-soluble polysaccharide ether with an anion exchange resin. Anion exchange resins that are useful in the invention are derived from epoxy resin polymers, acrylic based copolymers or a copolymer of styrene-divinylbenzene. The method significantly reduces the amount of colored bodies in the polysaccharide ether.
摘要翻译： 通过水溶性多糖醚的水溶液与阴离子交换树脂的接触，从水溶性多糖醚例如水溶性纤维素醚中除去不需要的物质的方法。 可用于本发明的阴离子交换树脂衍生自环氧树脂聚合物，丙烯酸基共聚物或苯乙烯 - 二乙烯基苯的共聚物。 该方法显着减少多糖醚中着色体的含量。
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公开(公告)号：US5488104A
公开(公告)日：1996-01-30
申请号：US268402
申请日：1994-06-30
申请人： Gary J. Schulz
发明人： Gary J. Schulz
CPC分类号： C08J3/12 , C08B11/20 , C08J2301/28
摘要： This invention is a process for comminuting a cellulose ether which comprises extruding a hydrated cellulose ether through a plurality of orifices, each orifice having a cross-sectional area of from about 7.5.times.10.sup.-9 m.sup.2 to about 1.times.10.sup.-6 m.sup.2, to form an elongated extrudate, and then cutting the elongated extrudate to desired length. The high density cellulose ether product is typically cold water dispersible, non-dusty, and free flowing.
摘要翻译： 本发明是粉碎纤维素醚的方法，其包括通过多个孔挤出水合纤维素醚，每个孔的横截面积为约7.5×10 -9 m 2至约1×10 -6 m 2，以形成细长的 挤出，然后将细长的挤出物切割成所需长度。 高密度纤维素醚产品通常是冷水可分散的，无尘的和自由流动的。
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公开(公告)号：US4581446A
公开(公告)日：1986-04-08
申请号：US712287
申请日：1985-03-15
申请人： Gary J. Schulz
发明人： Gary J. Schulz
IPC分类号： C08B11/20
CPC分类号： C08B11/20
摘要： Impurities in cellulose ether compositions are removed by providing a functionally effective thickness of a cellulose ether composition to a filtration device, and contacting the thickness, in a manner such that substantial thickness is maintained with at least one extracting solution in which the impurities in the cellulose ether are soluble such that a gradient impurity concentration is formed. High purity cellulose ethers are prepared, without experiencing large product losses.
摘要翻译： 通过向过滤装置提供功能有效厚度的纤维素醚组合物并且以使得与至少一种提取溶液保持相当厚度的方式接触该厚度以除去纤维素醚组合物中的杂质，其中纤维素中的杂质 醚可溶，使得形成梯度杂质浓度。 制备高纯度纤维素醚，不会产生大量的产品损失。
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公开(公告)号：US06294008B1
公开(公告)日：2001-09-25
申请号：US09295692
申请日：1999-04-21
申请人： Colin M. Keary , Gary J. Schulz
发明人： Colin M. Keary , Gary J. Schulz
IPC分类号： C09D10126
CPC分类号： C08B11/20 , A61K9/4816 , C08L1/28
摘要： Disclosed is a cellulose ether composition having a low molecular weight cellulose ether of a viscosity of about 200 centipoise or less in a two percent aqueous solution at 20° C. The composition has a sodium chloride content of about 0.3 weight percent or less based upon the weight of the cellulose ether. The composition exhibits significantly reduced haze formation when in capsule form. Also disclosed is a process for making the composition.
摘要翻译： 公开了一种在20℃下在2％水溶液中具有约200厘泊或更低粘度的低分子量纤维素醚的纤维素醚组合物。该组合物的氯化钠含量基于 纤维素醚的重量。 当胶囊形式时，组合物显示出显着降低的雾度形成。 还公开了制备该组合物的方法。
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公开(公告)号：US06261218B1
公开(公告)日：2001-07-17
申请号：US09203324
申请日：1998-12-01
申请人： Gary J. Schulz
发明人： Gary J. Schulz
IPC分类号： C08B1100
摘要： There is a process for making a cellulose ether. The process comprises the following: a) alkalyzing a cellulose pulp; b) etherifying the alkalyzed cellulose pulp to form a cellulose ether; c) washing the cellulose ether; d) drying the cellulose ether; e) milling the cellulose ether to a particulate form; f) heating the particulate cellulose ether; g) tumbling the particulate cellulose ether while simultaneously contacting it with an acid to partially depolymerize it to a lower molecular weight; h) partially or substantially neutralizing the acid. There is also an apparatus for making the cellulose ether.
摘要翻译： 有一种制备纤维素醚的方法。 该方法包括以下步骤：a）碱化纤维素纸浆; b）使烷基化纤维素纸浆醚化以形成纤维素醚; c）洗涤纤维素醚; d）干燥纤维素醚; e）将纤维素醚研磨成颗粒状; f）加热颗粒状纤维素醚; g）转动颗粒状纤维素醚，同时使其与酸接触以将其部分解聚至较低分子量; h）部分或基本上中和酸。 还有一种制备纤维素醚的装置。
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