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    • 75. 发明授权
    • Process for production of 1-aminoanthraquinone
    • 1-氨基蒽醌的制备方法
    • US4840749A
    • 1989-06-20
    • US62638
    • 1987-06-16
    • Noriaki IkedaNoboru SugishimaYasushi FujiiShinji IkutaYoshiyuki NakanishiAkira Inoue
    • Noriaki IkedaNoboru SugishimaYasushi FujiiShinji IkutaYoshiyuki NakanishiAkira Inoue
    • C09B1/18
    • C09B1/18
    • A process for producing 1-aminoanthraquinone, which comprises(a) a step of oxidizing 1-nitronaphthalene in the liquid phase with an acidic aqueous solution containing a ceric ion as an oxidizing agent and separating crystals containing 5-nitro-1,4-naphthoquinone and the acidic aqueous solution containing a cerium ion from the resulting reaction mixture,(b) a step of subjecting the 5-nitro-1,4-naphthoquinone obtained in step (a) to Diels-Alder reaction with 1,3-butadiene in a solvent, precipitating crystals containing the resulting 5-nitro-1,4,4a,9a-tetrahydroanthraquinone, separating them by filtration, separating and recovering the unreacted 1-nitronaphthalene and the solvent in the filtrate in a separation tower, and recycling 1-nitronaphthalene to step (a) for use as the starting material and re-using the recovered solvent for the Diels-Alder reaction,(c) a step of reducing 5-nitro-1,4,4a,9a-tetrahydroanthraquinone obtained in step (b), separating crystals containing 1-aminoanthraquinone and purifying them, and(d) a step of electrolytically oxidizing the acidic aqueous solution containing a cerium ion separated in step (a) to convert the cerous ion in the acidic aqueous solution to a ceric ion and recycling the resulting acidic aqueous solution containing a ceric ion to step (a) for re-use as the oxidizing agent.
    • 一种生产1-氨基蒽醌的方法,其包括(a)用含有铈离子的酸性水溶液作为氧化剂在液相中氧化1-硝基萘并分离含有5-硝基-1,4-萘醌的晶体的步骤 和从所得反应混合物中含有铈离子的酸性水溶液,(b)使步骤(a)中得到的5-硝基-1,4-萘醌与1,3-丁二烯反应, 溶剂,沉淀含有所得5-硝基-1,4,4a,9a-四氢蒽醌的晶体,通过过滤分离,在分离塔中分离和回收滤液中的未反应的1-硝基萘和溶剂,并回收1- 硝基萘,步骤(a)用作原料并重新使用回收的溶剂进行狄尔斯 - 阿尔德反应,(c)将步骤(5)中得到的5-硝基-1,4,4a,9a-四氢蒽醌 b)分离含有1-氨基丁醇的晶体 并对其进行纯化,(d)在步骤(a)中分离出含有铈离子的酸性水溶液的电解氧化步骤,将酸性水溶液中的铈离子转化为铈离子,并将得到的含有 步骤(a)的铈离子用作再次用作氧化剂。
    • 80. 发明授权
    • Fifth wheel
    • 第五轮
    • US4447070A
    • 1984-05-08
    • US498642
    • 1983-05-27
    • Akira Inoue
    • Akira Inoue
    • B62D53/08B62D53/12
    • B62D53/12
    • A fifth wheel provided on a tractor and adapted to be connected to a king pin fixed to a trailer. The fifth wheel comprises a base plate provided with a slot for receiving the king pin, a stationary lock fixed to the portion of the base plate near the terminal end of the slot and provided with a semi-circular recess, a movable lock pivotally supported by a vertical shaft and including a main body provided with a semi-circular recess and a hook adapted to contact the front end of the king pin when the latter moves into the slot, a spring adapted to hold the movable lock in the open position, a retainer piece movable along a guide on the base plate and adapted to hold the movable lock in the closed position, a bar connected to the retainer piece and provided with a spring for holding the retainer piece to hold the movable lock in the closed position, and projections on the bar for engaging with the base plate for holding the bar at the opened and closed positions.
    • 设置在拖拉机上并适于连接到固定到拖车上的主销的第五轮。 第五轮包括设置有用于接收主销的槽的底板,固定在基板的靠近槽的终端的部分的固定锁,并设置有半圆形凹部,可枢转地支撑的活动锁 垂直轴,其包括设置有半圆形凹部的主体和适于在所述主销移动到所述槽中时接触所述主销的前端的钩,适于将所述可动锁保持在所述打开位置的弹簧, 保持件可沿着基板上的引导件移动并且适于将可移动锁定件保持在关闭位置,连接到保持器并设置有用于保持保持器件以将可动锁保持在关闭位置的弹簧的杆,以及 杆上的凸起与基板接合以将杆保持在打开和关闭位置。