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公开(公告)号：US4145353A
公开(公告)日：1979-03-20
申请号：US850516
申请日：1977-11-10
申请人： Norbert Schenk , Paul Losacker , Manfred Martin
发明人： Norbert Schenk , Paul Losacker , Manfred Martin
IPC分类号： C07D307/89 , C07C46/10 , C07C51/573
CPC分类号： C07C46/10 , C07C51/573
摘要： A process for removing 1,4-naphthoquinone from phthalic anhydride has now been found, which is characterized in that phthalic anhydride containing 1,4-naphthoquinone, or mixtures containing phthalic anhydride and also containing 1,4-naphthoquinone, are subjected to a heat treatment at temperatures from 200 .degree. to 300.degree. C. in the presence of 1,4,4a,9a-tetrahydroanthraquinone.
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公开(公告)号：US4003924A
公开(公告)日：1977-01-18
申请号：US546833
申请日：1975-02-03
申请人： Wolfgang Auge , Karl-Werner Thiem , Rutger Neeff , Paul Losacker , Rudolf Braden
发明人： Wolfgang Auge , Karl-Werner Thiem , Rutger Neeff , Paul Losacker , Rudolf Braden
IPC分类号： C09B1/22 , C07C20060101 , C07C225/34 , C07C97/24
CPC分类号： C07C225/34
摘要： 1-Amino anthraquinone is prepared by reacting 1-nitro-anthraquinone with ammonia in water and/or an organic solvent and thereafter treating the 1-amino-anthraquinone imine formed with water thereby converting said imine into 1-amino anthraquinone.
摘要翻译： 1-氨基蒽醌通过1-硝基 - 蒽醌与氨在水和/或有机溶剂中的反应制备，然后处理由水形成的1-氨基 - 蒽醌亚胺，从而将所述亚胺转化为1-氨基蒽醌。
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公开(公告)号：US4220597A
公开(公告)日：1980-09-02
申请号：US6402
申请日：1979-01-25
CPC分类号： C07C46/04 , C07C46/02 , C07C51/313
摘要： A process has been found for the preparation of anthraquinone by catalytic oxidation of naphthalene in the gas phase to provide a reaction product, obtained by quenching, cooling or quenching and cooling, containing naphthaquinone and phthalic anhydride, treating said reaction product directly with butadiene to provide tetrahydroanthraquinone, oxidation by means of molecular oxygen to the tetrahydroanthraquinone contained in this reaction product, to give anthraquinone, and separation of naphthalene, phthalic anhydride, anthraquinone and by-products by distillation, the gases produced in the quenching and/or cooling of the gases from the naphthalene oxidation and the gases from the oxidation of the tetrahydroanthraquinone to give anthraquinone being completely or partially recycled to the oxidation of naphthalene, in which a compound with an alkaline reaction is introduced between the reactor in which naphthalene is oxidized and the reactor in which the reaction with butadiene takes place, and/or into the gas streams which are recycled to the oxidation of naphthalene.The process of the invention reduces considerably the formation of higher-boiling products formed in the continuous preparation of anthraquinone from naphthalene and increases the selectivity of the conversion of naphthalene to anthraquinone. In addition, the process of the invention provides greater freedom in separation of the reaction products since the production of troublesome high-boilers is minimized; and the process results in a reduced formation of carbon dioxide in the oxidation of naphthalene.
摘要翻译： 已经发现通过在气相中催化氧化萘来制备蒽醌的方法，以提供含有萘醌和邻苯二甲酸酐的淬火，冷却或冷却或冷却获得的反应产物，直接用丁二烯处理所述反应产物以提供 四氢蒽醌，通过分子氧氧化成该反应产物中所含的四氢蒽醌，得到蒽醌，并通过蒸馏分离萘，邻苯二甲酸酐，蒽醌和副产物，在气体的淬火和/或冷却中产生的气体 从萘氧化和四氢蒽醌氧化的气体中得到蒽醌被完全或部分地再循环到萘的氧化中，其中将具有碱性反应的化合物引入萘被氧化的反应器中，其中反应器 与丁二烯的反应需要 ace和/或进入再循环到萘的氧化的气流中。 本发明的方法显着降低了从萘中连续制备蒽醌形成的较高沸点产物，并提高了萘转化为蒽醌的选择性。 此外，本发明的方法提供了更大的反应产物分离自由度，因为生产麻烦的高锅炉最小化; 并且该过程导致萘氧化中二氧化碳的形成减少。
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公开(公告)号：US4284576A
公开(公告)日：1981-08-18
申请号：US944934
申请日：1978-09-22
申请人： Norbert Schenk , Jorg Krekel , Paul Losacker , Wolfgang Swodenk
发明人： Norbert Schenk , Jorg Krekel , Paul Losacker , Wolfgang Swodenk
摘要： In the preparation of anthraquinone by reacting a mixture containing naphthalene, phthalic anhydride and tetrahydroanthraquinone with oxygen at elevated temperature while simultaneously separating off at least part of the naphthalene, the improvement which comprises supplying the naphthalene, phthalic anhydride and tetrahydroanthraquinone to a distillation system which consists of a column having a rectifying section, a stripping section and a boiler, at least one of the stripping section and the boiler being designed so that rapid through-passage of the feed mixture is prevented. Downcomers in the stripping section maintain liquid levels on the trays of about 5 to 500 mm and the boiler may have several successive chambers to provide the desired residence time in the system. A liquid mixture of naphthalene, phthalic anhydride and anthraquinone is removed from the boiler while a gas mixture including naphthalene is taken off from the rectifying section, being cooled to condense naphthalene for use in oxidation to naphthoquinone and phthalic anhydride.
摘要翻译： 在通过使萘，邻苯二甲酸酐和四氢蒽醌的混合物与氧在升高的温度下反应而同时分离至少部分萘的方法制备蒽醌时，其改进包括将萘，邻苯二甲酸酐和四氢蒽醌供应到蒸馏系统中，该蒸馏系统包括 具有整流部分，汽提部分和锅炉的塔中，至少一个汽提段和锅炉被设计成防止进料混合物的快速通过。 汽提部分中的降液管保持托盘上的液面大约为5至500mm，并且锅炉可以具有几个连续的室以在系统中提供期望的停留时间。 将萘，邻苯二甲酸酐和蒽醌的液体混合物从锅炉中除去，同时从精馏段中取出包含萘的气体混合物，冷却以冷凝萘用于氧化成萘醌和邻苯二甲酸酐。
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公开(公告)号：US3972955A
公开(公告)日：1976-08-03
申请号：US505894
申请日：1974-09-13
申请人： Kurt Halcour , Paul Losacker , Wulf Schwerdtel , Wolfgang Swodenk
发明人： Kurt Halcour , Paul Losacker , Wulf Schwerdtel , Wolfgang Swodenk
CPC分类号： C07C11/18 , C07D319/06
摘要： In the preparation of isoprene by reacting isobutene with formaldehyde to produce 4,4-dimethyl-m-dioxane in a first stage, and decomposing the dioxane to isoprene and formaldehyde in a second stage, formaldehyde in the effluent streams of either or both of said stages is recovered. The formaldehyde-containing liquids are distilled to separate high boilers; the overhead, which is formaldehyde-rich, is extracted with isobutene feed to the process, whereby the isobutene extracts low boilers from the formaldehyde-containing liquid; and the formaldehyde-containing liquid, having at some point after said distillation been treated with an alkaline material, is subjected to rectification to produce as head product, the recovered formaldehyde.
摘要翻译： 在通过使异丁烯与甲醛反应以在第一阶段中制备4,4-二甲基 - 间二恶烷制备异戊二烯并在第二阶段中将二恶烷分解成异戊二烯和甲醛的过程中，所述 阶段恢复。 将含甲醛的液体蒸馏以分离高锅炉; 富含甲醛的塔顶馏出物用异丁烯进料提取到该方法中，由此异丁烯从含甲醛的液体中提取低沸点物; 并且在所述蒸馏之后的某一点处，用碱性物质处理的含甲醛的液体经过精馏，作为回收的甲醛的头部产物。
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