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1.发明授权
公开(公告)号：US4339573A
公开(公告)日：1982-07-13
申请号：US165868
申请日：1980-07-07
IPC分类号： C08B11/02 , C08B1/08 , C08B1/06 , C08B11/193
CPC分类号： C08B1/08
摘要： This invention relates to an improved process for preparing cellulose derivatives by alkalizing cellulose to form alkali cellulose, alkylating the alkali cellulose to form alkylated alkali cellulose, and recovering the alkylated alkali cellulose. According to the process of the invention, finely-divided, preferably powdered, cellulose is reacted with an aqueous-alcoholic alkali metal hydroxide solution at a temperature of from about 20.degree. to 120.degree. C., to form alkali cellulose, oxygen is removed, and the water content is reduced to from about 2.5 to 6.0 moles per anhydroglucose unit, prior to alkylization.
摘要翻译： 本发明涉及通过碱化纤维素来形成碱纤维素，烷基化碱性纤维素以形成烷基化碱纤维素并回收烷基化碱纤维素来制备纤维素衍生物的改进方法。 根据本发明的方法，将微细的，优选粉末状的纤维素与约20-120℃的水性醇碱金属氢氧化物溶液反应，形成碱性纤维素，除去氧气， 并且在烷基化之前将水含量降低至约2.5至6.0摩尔/脱水葡萄糖单元。
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公开(公告)号：US4339574A
公开(公告)日：1982-07-13
申请号：US165869
申请日：1980-07-07
IPC分类号： C08B11/02 , C08B11/193 , C08B17/06 , C08B11/08
CPC分类号： C08B17/06 , C08B11/02 , C08B11/193
摘要： This invention is directed to a method for the continuous production of alkyl cellulose by reacting alkali cellulose with alkylating agents in the presence of inert liquids, wherein:(a) powdered cellulose is reacted with aqueous-alcoholic alkali metal hydroxide solution at temperatures of from about 20.degree. to 80.degree. C. to form alkali cellulose;(b) oxygen is completely removed from the alkali cellulose reaction mixture of step (a) and the water content is reduced to about 2.5 to 6.0 moles per anhydroglucose unit; and(c) the reaction mixture from step (b) is reacted with at least a stoichiometric amount, but not more than with a molar excess of up to about 50%, based on the alkali metal hydroxide, of an alkylating agent in an inert liquid boiling at a temperature of from about 80.degree. to 160.degree. C., the reaction being carried out continuously in stirred tanks-in-series with 2 to 10 units.
摘要翻译： 本发明涉及一种在惰性液体存在下使碱纤维素与烷基化剂反应连续生产烷基纤维素的方法，其中：（a）粉末状纤维素与含水醇碱金属氢氧化物溶液在约 20〜80℃，形成碱纤维素; （b）从步骤（a）的碱纤维素反应混合物中完全除去氧气，并且每个脱水葡萄糖单元的含水量降低至约2.5至6.0摩尔; 和（c）来自步骤（b）的反应混合物与基于碱金属氢氧化物的烷基化剂在惰性物质中的至少化学计量量但不超过摩尔过量至多约50％ 液体在约80℃至160℃的温度下沸腾，反应在2至10单位的串联搅拌釜中连续进行。
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公开(公告)号：US4341892A
公开(公告)日：1982-07-27
申请号：US243502
申请日：1981-03-13
申请人： Norbert Kuhne , Hasso Leischner , Wilfried Rahse , Willi Wust
发明人： Norbert Kuhne , Hasso Leischner , Wilfried Rahse , Willi Wust
IPC分类号： C08B1/08
CPC分类号： C08B1/08
摘要： This invention is directed to the preparation of alkali cellulose. More particularly, this invention is directed to a process for the preparation of alkali cellulose having a low water content, wherein finely divided cellulose suspended in a typical inert organic solvent is presteeped and the cellulose suspension is contacted with an alkali metal hydroxide/alcohol mixture and at least one aqueous alkalization solution of different concentration.
摘要翻译： 本发明涉及碱纤维素的制备。 更具体地说，本发明涉及一种制备水含量低的碱纤维素的方法，其中悬浮在典型的惰性有机溶剂中的细碎纤维是预先悬浮的，纤维素悬浮液与碱金属氢氧化物/醇混合物接触， 至少一种不同浓度的碱性水溶液。
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公开(公告)号：US5846798A
公开(公告)日：1998-12-08
申请号：US605102
申请日：1996-05-13
申请人： Kathleen Paatz , Wilfried Rahse , Werner Pichler , Horst Upadek , Norbert Kuhne
发明人： Kathleen Paatz , Wilfried Rahse , Werner Pichler , Horst Upadek , Norbert Kuhne
CPC分类号： C11D3/38672 , B01J2/20 , C12N9/98
摘要： Enzyme granules having an average particle size of from about 1 to about 2.2 mm are disclosed. The enzyme granules comprise an extruded particulate first enzyme component containing at least one enzyme and organic and/or inorganic carrier material and a second particulate enzyme component containing at least one particulate enzyme different from the one enzyme in the said first enzyme component, wherein the second particulate enzyme component is agglomerated onto the particulate first enzyme component, and wherein the average particle size of the particulate first enzyme component is in the range of from about 1.1 to about 3 times the average particle size of the second particulate enzyme component. Furthermore, a process for the preparation of the enzyme granules is disclosed.
摘要翻译： PCT No.PCT / EP94 / 02779 Sec。 371日期：1996年5月13日 102（e）日期1996年5月13日PCT 1994年8月22日PCT公布。 公开号WO95 / 06709 日期1995年3月9日公开了平均粒度为约1至约2.2mm的酶颗粒。 所述酶颗粒包含含有至少一种酶和有机和/或无机载体材料的挤出颗粒状第一酶组分和含有与所述第一酶组分中的一种酶不同的至少一种颗粒酶的第二颗粒酶组分，其中第二种 颗粒状酶组分聚集在颗粒状第一酶组分上，其中颗粒状第一酶组分的平均粒度在第二颗粒酶组分的平均粒度的约1.1至约3倍的范围内。 此外，公开了制备酶颗粒的方法。
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