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    • 1. 发明授权
    • Process for purifying terephthalic acid
    • 对苯二甲酸纯化方法
    • US4263452A
    • 1981-04-21
    • US147283
    • 1980-05-06
    • Makoto KomatsuRyoichi Oda
    • Makoto KomatsuRyoichi Oda
    • C07C51/487C07C51/42
    • C07C51/487
    • Crude terephthalic acid obtained by oxidation of p-tolualdehyde in a liquid phase with molecular oxygen in the presence of a bromine compound as a catalyst, using water as a solvent is purified by dissolving the crude terephthalic acid in water, hydrogenating the aqueous solution of terephthalic acid with molecular hydrogen in the presence of a hydrogenating catalyst, and recrystallizing the terephthalic acid from the hydrogenated aqueous solution, where an alkaline material such as a hydroxide, a carbonate, or a bicarbonate of sodium, potassium, calcium or barium is added to the aqueous solution of terephthalic acid to be purified before the hydrogenation.The purified terephthalic acid has a very low 4-CBA content, and no hydrogenation catalyst activity is lowered by the addition of the alkaline material.
    • 通过在溴化合物作为催化剂的存在下,用分子氧在液相中通过使用水作为溶剂氧化对甲苯甲醛得到的粗对苯二甲酸通过将粗对苯二甲酸溶解在水中来氢化对苯二甲酸的水溶液 在氢化催化剂存在下与分子氢反应,并从氢化水溶液中重结晶对苯二甲酸,其中将碱性物质如氢氧化物,碳酸盐或碳酸氢钠,钠,钾,钙或钡加入到 在氢化之前要纯化的对苯二甲酸水溶液。 纯化的对苯二甲酸具有非常低的4-CBA含量,并且通过加入碱性材料不会降低氢化催化剂活性。
    • 4. 发明授权
    • Automatic rim replacing mechanism for tire uniformity inspecting machines
    • 轮胎均匀性检测机的自动轮缘更换机构
    • US4574628A
    • 1986-03-11
    • US645683
    • 1984-08-30
    • Yoshimata MaikumaYasushi NojiriRyoichi Oda
    • Yoshimata MaikumaYasushi NojiriRyoichi Oda
    • B60C25/132G01M17/02
    • G01M17/021
    • An automatic rim replacing mechanism for a tire uniformity inspecting machine, the replacing mechansim comprising: an upper spindle having rotating means for rotation about an axis concentric with the axis of a tire to be inspected; an upper rim releasably fixed to the upper spindle by a lock means provided on the upper spindle; a lower spindle detachably connectible to a lift member of a rim lifter movable up and down in the axial direction of the tire; a lower rim assembled with and retained on the lower spindle; coupling means fittingly engageable in concentric relation with the axis of the tire for releasably coupling the upper and lower spindles; and rim retaining means provided on the lower rim or spindle for holding the upper rim when released from the upper spindle.
    • 一种用于轮胎均匀性检查机的自动轮辋更换机构,所述更换机构包括:上心轴,其具有用于围绕与要检查的轮胎的轴线同心的轴线旋转的旋转装置; 通过设置在所述上​​心轴上的锁定装置可释放地固定到所述上心轴的上边缘; 可拆卸地连接到轮辋升降器的提升构件的下主轴,其沿轮胎的轴向上下移动; 下边缘组装并保持在下心轴上; 联接装置适于与轮胎的轴线同心地接合,用于可释放地联接上和下主轴; 以及设置在下边缘或主轴上的边缘保持装置,用于当从上心轴释放时保持上边缘。