专利号:US-4648994-A 优先权日:1985-02-04 标题:Process for the preparation of 1-amino-2-bromo-4-hydroxyanthraquinone 发明人:MUELLER ROLF; NIEDERER HANS; HAHN OTHMAR 权利人:CIBA GEIGY CORP 摘要:The invention discloses a process for the preparation of 1-amino-2-bromo-4-hydroxyanthraquinone by brominating 1-aminoanthraquinone in the 2- and 4-position in concentrated sulfuric acid and subsequently hydrolyzing the 1-amino-2,4-dibromoanthraquinone obtained as intermediate, which process comprises removing excess bromine and/or hydrobromic acid formed during the bromination from the reaction mixture and carrying out the hydrolysis at elevated temperature in the presence of an aldehyde. 1-Amino-2-bromo-4-hydroxyanthraquinone is an important intermediate for dyestuff synthesis and is used in particular for synthesizing anthraquinoid disperse dyes.
专利号:US-9670305-B2 优先权日:2012-04-16 标 题 :Polyurethane dispersant and the method for its preparation 发明人:WANG ZHIJUN 权利人:WANG ZHIJUN; AFCONA CHEMICALS (HAIMEN) CO LTD 摘要:The present invention is related to a polyurethane dispersant and a preparation method thereof. The polyurethane dispersant is terminated by a nitrogen-containing heterocyclic compound during synthesis. The nitrogen-containing heterocyclic compound is prepared by subjecting anhydride and a compound containing a primary amine and a secondary amine or a hydroxyl or mercapto group to dehydration condensation. The condensed product is the nitrogen-containing heterocyclic compound, containing a reactive hydrogen. The structural formula of the compound containing the primary amine and the secondary amine or hydroxyl or mercapto group is shown as follows: n nwherein n=1 to 5, and preferably 2 to 4, R 1 and R 2 are respectively alkyls containing 1 to 8 carbons, R 1 and R 2 are independent of each other or connected by a chemical bond to form one or more saturated or unsaturated 4-member to 8-member rings, and X represents N, O, or S.
专利号:CN-114456616-B 优先权日:2022-03-01 标 题 :Synthesis method of disperse red 60
专利号:CN-114456616-A 优先权日:2022-03-01 标 题:Synthesis method of disperse red 60
专利号:CN-118440318-A 优先权日:2024-04-09 标 题 :A type of anthraquinone-imine polymer and its synthesis method and application
1: Chi WC, Chen CH, Liu SM. Biodegradation of anthraquinone dyes by Shewanella sp. NTOU1 under anaerobic conditions. Water Sci Technol. 2009;60(4):889-99. doi: 10.2166/wst.2009.417.
合成参考文献
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