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1. 发明申请

WO2012064741A3 METHOD FOR THE PRODUCTION OF SUBSTITUTED POLYSACCHARIDES VIA REACTIVE EXTRUSION 审中-公开
标题翻译：通过反应挤出生产取代多糖的方法
公开(公告)号：WO2012064741A3
公开(公告)日：2014-04-10
申请号：PCT/US2011059785
申请日：2011-11-08
申请人： UNIV NEBRASKA , HANNA MILFORD , BHANDARI PRATIK
发明人： HANNA MILFORD , BHANDARI PRATIK
IPC分类号： C08B15/10
CPC分类号： C08B31/00 , C08B3/06 , C08B11/12 , C08B15/02 , C08B31/04 , C08B31/12 , C08B37/00
摘要： A reactive extrusion process tor the production of substituted polysaccharides, in particular, cellulose acetate, starch acetate, carboxymethyl cellulose, and carboxymethyl starch. One embodiment of the present invention is directed to a process for the acetylation of a polysaccharide via reactive extrusion to form a polysaccharide acetate, the process comprising: (a) forming an extrusion mixture comprising the polysaccharide, acetic anhydride, and iodine, wherein the polysaccharide is selected from the group consisting of a starch and a cellulose, and wherein the extrusion mixture has a weight ratio of acetic anhydride to polysaccharide that in the range of about 0.5 to about 8, and wherein the iodine is at an amount such that is in the range of about 0.04 to about 5% by weight of the acetic anhydride; (b) feeding the extrusion mixture into an extruder; and (c) extruding the extrusion mixture to acetylate the polysaccharide and form an extrudate comprising the polysaccharide acetate.
摘要翻译：一种反应性挤出方法，用于生产取代的多糖，特别是醋酸纤维素，乙酸淀粉，羧甲基纤维素和羧甲基淀粉。本发明的一个实施方案涉及通过反应性挤出乙酰化多糖以形成多糖乙酸酯的方法，该方法包括：（a）形成包含多糖，乙酸酐和碘的挤出混合物，其中多糖选自淀粉和纤维素，并且其中所述挤出混合物具有在约0.5至约8范围内的乙酸酐与多糖的重量比，并且其中所述碘的量为约0.04至约5重量％的乙酸酐的范围; （b）将挤出混合物进料到挤出机中; 和（c）挤出挤出混合物以使多糖乙酰化并形成包含多糖乙酸酯的挤出物。

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