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1. 发明专利

CH627772A5 VERFAHREN ZUR HERSTELLUNG VON NEUEN ANTHRACHINONDERIVATEN. 未知
公开(公告)号：CH627772A5
公开(公告)日：1982-01-29
申请号：CH651877
申请日：1977-05-26
申请人： NIPPON KAYAKU KK
发明人： ORITA RYUZO , KUROSAWA MITSURU
IPC分类号： C09B62/024 , D06P1/382 , D06P5/04 , C09B62/06 , C09B62/22

2. 发明专利

DE2458922A1 未知
公开(公告)号：DE2458922A1
公开(公告)日：1975-06-26
申请号：DE2458922
申请日：1974-12-12
申请人： NIPPON KAYAKU KK
发明人： KUROSAWA MITSURU , SERIZAWA SEIJI
IPC分类号： C07C45/00 , C07C46/10 , C07C50/34 , C07C67/00 , C07C49/75 , C07C45/24
摘要： For separating 1,5- and 1,8-dihydroxyanthraquinone from one another or for removing impurities from 1,5- or 1,8-dihydroxyanthraquinone, the fact is used that a) 1,5-dihydroxyanthraquinone is hardly soluble in an aqueous alkali metal hydroxide solution at a low alkali metal hydroxide concentration, but goes into solution as a salt at higher alkali metal hydroxide concentration and b) 1,8-dihydroxyanthraquinone is soluble in an aqueous alkali metal hydroxide solution at a low alkali metal hydroxide concentration, but is precipitated as a salt at a higher alkali metal hydroxide concentration. The 1,5- and 1,8-dihydroxyanthraquinones are suitable as intermediates for the preparation of dyestuffs.

4. 发明专利

DE2318294A1 未知
公开(公告)号：DE2318294A1
公开(公告)日：1973-10-25
申请号：DE2318294
申请日：1973-04-11
申请人： NIPPON KAYAKU KK
发明人： ISHII SHIGERU , MATSUSHITA HIDEO , KUROSAWA MITSURU , NISHI KENICHIRO , KIMURA SEIKICHI
IPC分类号： C09B29/08 , C09B31/043 , C09B29/00

5. 发明专利

DE2724214A1 未知
公开(公告)号：DE2724214A1
公开(公告)日：1977-12-15
申请号：DE2724214
申请日：1977-05-27
申请人： NIPPON KAYAKU KK
发明人： ORITA RYUZO , KUROSAWA MITSURU
IPC分类号： C09B62/024 , D06P1/382 , D06P5/04 , C09B62/06
摘要： Anthraquinone compounds represented by the following formula are useful as dyes: (1) wherein Y stands for a hydrogen atom or a nitro group, Z stands for an oxygen or sulfur atom when Y stands for a hydrogen atom, but Z stands for an oxygen atom when Y stands for a nitro group, R1 stands for a hydrogen atom or a lower alkyl group, R3 stands for a halogen atom or a group R2 wherein R2 stands for an amino, substituted or unsubstituted lower alkylamino, substituted or unsubstituted arylamino, substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted alkylthio, substituted or unsubstituted arylthio group, or a group Q stands for a nitrogen atom or carbon atom bearing a halogen atom when R3 stands for a halogen atom, but Q stands for a nitrogen atom when R3 stands for a group R2, X stands for a halogen atom, the group links to the benzene ring in the 3'- or 4'-position, and M stands for an alkali metal or hydrogen atom.

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