1998～2002年这5年是世界上号称'重磅炸弹药品'专利到期非常密集的时间段,专利到期的药品包括奥美拉唑、依那普利及氟西汀等世界药品销售额连续数年稳居前10位的药品,由此引发世界药品市场的格局发生了新的变化,新药研发-直是...1998～2002年这5年是世界上号称'重磅炸弹药品'专利到期非常密集的时间段,专利到期的药品包括奥美拉唑、依那普利及氟西汀等世界药品销售额连续数年稳居前10位的药品,由此引发世界药品市场的格局发生了新的变化,新药研发-直是生产这些专利药品的跨国制药公司发展的原动力,而现实情况是,近2年来世界各国批准新药的数量却呈现出20年来新的'低谷',2002年仅上市36个新活性物质(new active substances,NAS)[1],世界制药业缺乏能够替代传统重磅炸弹的新鲜血液.展开更多
NaA zeolite membranes with 80 cm in length and 12.8 mm in outer diameter were prepared by our research group cooperating with Nanjing Jiusi Hi-Tech Co., China. The influence of dissolved inorganic salts and pH value i...NaA zeolite membranes with 80 cm in length and 12.8 mm in outer diameter were prepared by our research group cooperating with Nanjing Jiusi Hi-Tech Co., China. The influence of dissolved inorganic salts and pH value in the feed of isopropanol （IPA） solution on NaA zeolite membranes was investigated. It was found that both factors exhibited strong influence on the stability of NaA zeolite membranes. A set of pretreatment steps such as pH adjustment and distillation of the IPA solution were proposed to improve stability for pervaporation dehydration. An industrial-scale pervaporation facility with 52 m2 membrane area was built to dehydrate IPA solution from industrial cephalosporin production. The facility was continuously operated at 368-378 K to dehydrate IPA solution from water mass content of 15%-20% to less than 2% with a feed flow rate of 400-500 L·h^-1 and an average water flux of 1-1.5 kg·m^-2·h-1. The successful application of this facility suggested a promising application of NaA zeolite mem-brane for IPA recovery from pharmaceutical production.展开更多
文摘1998～2002年这5年是世界上号称'重磅炸弹药品'专利到期非常密集的时间段,专利到期的药品包括奥美拉唑、依那普利及氟西汀等世界药品销售额连续数年稳居前10位的药品,由此引发世界药品市场的格局发生了新的变化,新药研发-直是生产这些专利药品的跨国制药公司发展的原动力,而现实情况是,近2年来世界各国批准新药的数量却呈现出20年来新的'低谷',2002年仅上市36个新活性物质(new active substances,NAS)[1],世界制药业缺乏能够替代传统重磅炸弹的新鲜血液.
基金Supported by the National t）asic Research Program of China （2009CB623403）, the National High Technology Research and De velopment Program of China （2009AA034802）, the National Natural Science Foundation of China （20706030, U0834004）, the Science ＆ Technology Support Program （Industry） of Jiangsu Province of China （BE2008141）, the Natural Science Foundation of the Jiangsu Higher Education Institutions （09KJA530002） and 333 High-Level Personnel Training Project in Jiangsu Province. ＊＊ To whom correspondence should be addressed. E-mail： Xuehonggu@yahoo.com
文摘NaA zeolite membranes with 80 cm in length and 12.8 mm in outer diameter were prepared by our research group cooperating with Nanjing Jiusi Hi-Tech Co., China. The influence of dissolved inorganic salts and pH value in the feed of isopropanol （IPA） solution on NaA zeolite membranes was investigated. It was found that both factors exhibited strong influence on the stability of NaA zeolite membranes. A set of pretreatment steps such as pH adjustment and distillation of the IPA solution were proposed to improve stability for pervaporation dehydration. An industrial-scale pervaporation facility with 52 m2 membrane area was built to dehydrate IPA solution from industrial cephalosporin production. The facility was continuously operated at 368-378 K to dehydrate IPA solution from water mass content of 15%-20% to less than 2% with a feed flow rate of 400-500 L·h^-1 and an average water flux of 1-1.5 kg·m^-2·h-1. The successful application of this facility suggested a promising application of NaA zeolite mem-brane for IPA recovery from pharmaceutical production.
