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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:US4881838A
公开(公告)日:1989-11-21
申请号:US765251
申请日:1985-08-12
CPC分类号: B41J11/04
摘要: A printing platen particularly for matrix printers is comprised of an aluminum or synthetic body carrying a thin layer of a ceramic material, preferably aluminum oxide, titanium oxide, chromium dioxide or a blend thereof. Such a platen is sufficiently frictional and hard for withstanding the impact of high speed print hammers or needles.
摘要翻译: 特别是用于矩阵式打印机的印刷压印机由携带薄层陶瓷材料,优选氧化铝,氧化钛,二氧化铬或其混合物的铝或合成体构成。 这样的压板对于耐受高速打印锤或针的冲击而具有足够的摩擦力和硬度。
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