-
公开(公告)号：US4086418A
公开(公告)日：1978-04-25
申请号：US662134
申请日：1976-02-27
摘要： Hollow cellulosic fibers are produced by nitrosating and dissolving a cellulosic material in an aprotic solvent selected from the group consisting of a dialkylacylamide and dimethylsulfoxide and regenerating the dissolved cellulose by contacting the cellulose solution with a regenerant. The regenerant is n-octanol where the solvent is a dialkylacylamide and n-hexanol where the solvent is dimethylsulfoxide. The fibers are hollow as regenerated and require no special spinnerette designs nor special spinning conditions.
摘要翻译： 中空纤维素纤维通过将纤维素材料亚硝化并溶解在选自二烷基酰胺和二甲基亚砜的非质子溶剂中并通过使纤维素溶液与再生剂接触来再生溶解的纤维素来生产。 再生剂是正辛醇，其中溶剂是二烷基酰胺和正己醇，其中溶剂是二甲基亚砜。 纤维是中空的再生，不需要特殊的喷丝板设计和特殊的纺丝条件。
-
2.发明授权Supported catalyst, process for its production as well as its use in the oxychlorination of ethylene 失效负载催化剂，其生产方法及其在乙烯氧氯化中的应用
公开(公告)号：US5986152A
公开(公告)日：1999-11-16
申请号：US198251
申请日：1998-11-24
IPC分类号： B01J23/83 , B01J27/122 , B01J35/02 , B01J35/10 , C07B61/00 , C07C17/08 , C07C17/156 , C07C19/045 , B01J23/72
CPC分类号： B01J35/026 , B01J23/83 , B01J27/122 , C07C17/156
摘要： A supported catalyst includes: a) 0.5-15 wt. % of one or more Cu-II compounds, the quantitative amounts referring to copper metal; b) 0.1-8 wt. % of one or more alkali metal compounds, the quantitative amounts referring to alkali metal; c) 0.1-10 wt. % of an oxide mixture including; c1) 80-95 mole % of oxides of cerite rare earths with atomic Nos. 57 to 62, except promethium, and c2) 5-20 mole % of zirconium dioxide, where c1) and c2) must together total 100 mole % and the quantitative amount of c) refers to the oxides of the mixture, and d) the remainder up to 100 wt. % being .gamma. and/or .alpha.-aluminum oxide as support material, wherein e) the support material d) has a total pore volume in the range from 0.65 to 1.2 cm.sup.3 /g, and wherein f) the supported catalyst is present in the form of cylindrical hollow bodies having at least one passage channel, the ratio of height h to external diameter d.sup.e being less than 1.5 for diameters d.sub.e of up to 6 mm, and the ratio h/d.sub.e being less than 0.6 for diameter d.sub.e greater than 6 mm. A process for producing the supported catalyst is also described.
摘要翻译： 负载催化剂包括：a）0.5-15wt。 ％的一种或多种Cu-II化合物，定量为铜金属; b）0.1-8wt。 ％的一种或多种碱金属化合物，定量为碱金属; c）0.1-10重量％ ％的氧化物混合物包括： c1）80-95摩尔％的原子号为57〜62的铈铈稀土的氧化物，除了碲，和c2）5-20摩尔％的二氧化锆，其中c1）和c2）必须总共为100摩尔％ 定量的c）是指混合物的氧化物，和d）余量高达100wt。 ％为γ和/或α-二氧化铝作为载体材料，其中e）载体材料d）具有在0.65-1.2cm 3 / g范围内的总孔体积，并且其中f）负载型催化剂以 具有至少一个通道的圆柱形空心体，对于直径为d至6mm，高度h与外径之比de小于1.5，直径d大于0.6的比率h / de小于0.6 。 还描述了制备负载型催化剂的方法。
-
公开(公告)号：US4056675A
公开(公告)日：1977-11-01
申请号：US662132
申请日：1976-02-27
IPC分类号： C08B16/00
CPC分类号： C08B16/00
摘要： Regenerated cellulosic fibers of improved resistance to alkaline treatment are produced by nitrosating and dissolving from 5 to 14% by weight of a cellulosic material in a dialkylacylamide solvent while said solution is maintained at a temperature no greater than 20.degree. C to form a cellulose nitrite ester, and regenerating the cellulose by contacting the cellulose ester with a regenerant. Regeneration of the cellulose occurs before significant oxidation of the cellulose takes place.
摘要翻译： 改进的抗碱性处理的再生纤维素纤维是通过在5-14重量％的纤维素材料的二烷基酰胺溶剂中亚硝化和溶解而制备的，同时将所述溶液保持在不高于20℃的温度下形成亚硝酸纤维素酯 ，并通过使纤维素酯与再生剂接触来再生纤维素。 纤维素的再生发生在纤维素发生显着氧化之前。
-
公开(公告)号：US5187233A
公开(公告)日：1993-02-16
申请号：US490729
申请日：1990-03-08
申请人： Peter Ball , Josef Christ , Albin Frank , Klaus Marquardt , Manfred Selig
发明人： Peter Ball , Josef Christ , Albin Frank , Klaus Marquardt , Manfred Selig
IPC分类号： A61K47/48 , C08F255/02 , C08F263/04
CPC分类号： A61K47/48007 , C08F255/026 , C08F263/04
摘要： A process is provided for the production of a graft copolymer by means of emulsion polymerization. The graft base used is a sulfonate group-containing vinyl ester/ethylene latex which is stabilized exclusively by an anionic emulsifier (CMC.gtoreq.0.5% by weight in H.sub.2 O) and is grafted, preferably with vinyl chloride, without further addition of emulsifier or protective colloid. The graft copolymers according to the invention have good water resistance and very good thermoplastic processability. They are useful as impact modifiers and for the production of articles, such as, soft to semi-hard moldings.
摘要翻译： 提供了通过乳液聚合制备接枝共聚物的方法。 所使用的接枝基是含有磺酸基的乙烯基酯/乙烯胶乳，其仅由阴离子乳化剂（CMC> / = 0.5重量％，在H 2 O中）稳定，并且优选用氯乙烯接枝，而不进一步加入乳化剂或 保护胶体。 根据本发明的接枝共聚物具有良好的耐水性和非常好的热塑性加工性。 它们可用作抗冲击改性剂和用于生产物品，如软硬半成品。
-
公开(公告)号：US4076933A
公开(公告)日：1978-02-28
申请号：US662138
申请日：1976-02-27
CPC分类号： C08B5/00 , C08B16/00 , D01F2/24 , Y10T428/2973
摘要： Shaped cellulosic fibers are produced by nitrosating and dissolving a cellulosic material in an aprotic solvent selected from the group consisting of a dialkylacylamide and dimethylsulfoxide and regenerating the dissolved cellulose by contacting the cellulose solution with a regenerant. The regenerant is butanol, pentanol or benzyl alcohol where the solvent is a dialkylacylamide and propanol, butanol or benzyl alcohol where the solvent is dimethylsulfoxide. The fibers have a generally crenulated shape as regenerated and require no special spinnerette designs nor special spinning conditions.
摘要翻译： 成型的纤维素纤维通过将纤维素材料亚硝化并溶解在选自二烷基酰胺和二甲基亚砜的非质子溶剂中并通过使纤维素溶液与再生剂接触来再生溶解的纤维素来生产。 再生剂是丁醇，戊醇或苄醇，其中溶剂是二烷基酰胺和丙醇，丁醇或苄醇，其中溶剂是二甲基亚砜。 纤维通常具有再生的形状，不需要特殊的喷丝板设计，也不需要特殊的纺丝条件。
-
公开(公告)号：US4076932A
公开(公告)日：1978-02-28
申请号：US662137
申请日：1976-02-27
摘要： Regenerated cellulosic articles are produced by nitrosating and dissolving cellulose in a dialkylacylamide solvent, such as dimethylformamide, and regenerating the dissolved cellulose by passing into a coagulant bath. The coagulant comprises water or a 1 to 4 carbon atom aliphatic monohydric alcohol and a soluble reactive base, the latter in an amount ranging from 6% to 25% by weight of the regenerant. The process produces regenerated cellulose products of improved resistance to alkaline solubility.
摘要翻译： 再生纤维素制品通过将纤维素亚硝化并溶解在二甲基酰胺溶剂如二甲基甲酰胺中而制备，并通过进入凝结浴再生溶解的纤维素。 凝结剂包含水或1至4个碳原子的脂族一元醇和可溶性反应性碱，后者的量为再生剂重量的6％至25％。 该方法产生具有改善的耐碱性溶解性的再生纤维素产品。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.017 秒)
