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公开(公告)号:US5075458A
公开(公告)日:1991-12-24
申请号:US684873
申请日:1991-04-15
申请人: Reinhold Kohlhaupt , Manfred Gaeng , Lothar Haas , Guenter Engelhardt , Walter Bieg , Matthias Fankhaenel
发明人: Reinhold Kohlhaupt , Manfred Gaeng , Lothar Haas , Guenter Engelhardt , Walter Bieg , Matthias Fankhaenel
IPC分类号: C07D209/36 , C09B7/02
CPC分类号: C07D209/36 , C09B7/02
摘要: A process for the preparation of purified indigo comprises extracting the aqueous alkaline indoxylate solution arising from the synthesis with an inert water-insoluble solvent in the absence of oxygen before oxidizing the indoxylate solution to give indigo.
摘要翻译: 制备纯化靛蓝的方法包括在氧化吲哚氧化物溶液之前,用不含氧的惰性水不溶性溶剂萃取由合成产生的碱性氢氧化茚水溶液,得到靛蓝。
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公开(公告)号:US5109137A
公开(公告)日:1992-04-28
申请号:US729687
申请日:1991-07-15
申请人: Reinhold Kohlhaupt , Manfred Gaeng , Lothar Haas , Guenter Engelhardt , Walter Bieg , Matthias Fankhaenel
发明人: Reinhold Kohlhaupt , Manfred Gaeng , Lothar Haas , Guenter Engelhardt , Walter Bieg , Matthias Fankhaenel
IPC分类号: C07D209/36 , C09B7/02
CPC分类号: C07D209/36 , C09B7/02
摘要: A process for the preparation of purified indigo comprises extracting the aqueous alkaline indoxylate solution arising from the synthesis with an inert water-insoluble solvent in the absence of oxygen before oxidizing the indoxylate solution to give indigo.
摘要翻译: 制备纯化靛蓝的方法包括在氧化吲哚氧化物溶液之前,用不含氧的惰性水不溶性溶剂萃取由合成产生的碱性氢氧化茚水溶液,得到靛蓝。
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公开(公告)号:US5116996A
公开(公告)日:1992-05-26
申请号:US731657
申请日:1991-07-17
申请人: Reinhold Kohlhaupt , Walter Bieg , Ernst Lang
发明人: Reinhold Kohlhaupt , Walter Bieg , Ernst Lang
IPC分类号: C07D209/36 , C09B7/02
CPC分类号: C09B7/02
摘要: A process for purifying indigo comprises stripping the as-synthesized aqueous alkaline indoxylate solution before its oxidation to indigo of impurities in the absence of oxygen by distillation or by passing in steam or an inert gas and then treating the indigo precipitated on oxidation of the stripped indoxylate solution with dilute hydrogen peroxide solution.
摘要翻译: 纯化靛蓝的方法包括在合成的碱性氢氧化异丁酸钠溶液在蒸发或通过蒸汽或惰性气体氧化之前将其氧化成不含氧的杂质的靛蓝,然后处理在汽提的吲哚氧化物氧化时沉淀的靛蓝 溶液用稀二氧化氢溶液。
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公开(公告)号:US06265592B1
公开(公告)日:2001-07-24
申请号:US09674281
申请日:2000-10-30
申请人: Stefan Birnbach , Toni Dockner , Jürgen Mohr , Regina Benfer , Walter Bieg , Jarren Peters , Bernd Ruge , Werner Weinle , Peter Zehner
发明人: Stefan Birnbach , Toni Dockner , Jürgen Mohr , Regina Benfer , Walter Bieg , Jarren Peters , Bernd Ruge , Werner Weinle , Peter Zehner
IPC分类号: C07D31768
CPC分类号: C07D317/36 , C07D317/38
摘要: A process for the continuous production of 1,3-dioxolan-2-ones such as ethylene carbonate or propylene carbonate by reacting a corresponding oxirane with carbon dioxide in the liquid phase in the presence of a catalyst comprises conducting the reaction in a two-part reactor in whose first part the reaction is taken with backmixing to a conversion of not less than 80% of the oxirane II and in whose second part the reaction is completed under nonbackmixing conditions, and passing the carbon dioxide in countercurrent to the oxirane II in the entire reactor.
摘要翻译: 在催化剂存在下,使相应的环氧乙烷与二氧化碳在液相中反应,连续生产1,3-二氧戊环-2-酮如碳酸亚乙酯或碳酸亚丙酯的方法包括将反应进行两部分 反应器,其第一部分反应采用回混至不少于80%的环氧乙烷II的转化率,其第二部分反应在非回流条件下完成,并使二氧化碳与环氧乙烷II逆流通过 整个反应堆。
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