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    • 93. 发明授权
    • Cleaning method of treatment equipment and treatment equipment
    • 处理设备和处理设备的清洁方法
    • US07172657B2
    • 2007-02-06
    • US09801825
    • 2001-03-09
    • Yasuhiko KojimaYasuhiro Oshima
    • Yasuhiko KojimaYasuhiro Oshima
    • B08B3/10B08B9/00
    • C23C16/4405
    • In a state of the inside of a treatment chamber of treatment equipment being evacuated, therein a cleaning gas containing trifluoroaceticacid (TFA) as a cleaning agent is supplied. Metal such as copper used in the formation of an interconnection or an electrode and stuck on an inner wall surface of the treatment chamber, when coming into contact with the cleaning agent (TFA) in the cleaning gas, without forming an oxide or a metallic salt, is directly complexed. The complex is sublimed due to the evacuation and is exhausted outside the treatment chamber. Accordingly, at less labor and low cost, the cleaning can be efficiently implemented.
    • 在处理设备的处理室的内部被抽真空的状态下,其中提供含有三氟乙酸(TFA)作为清洁剂的清洁气体。 当形成互连或电极并且在与清洁气体中的清洁剂(TFA)接触时粘附在处理室的内壁表面上的金属,例如铜,而不形成氧化物或金属盐 ,直接复合。 复合体由于排空而升华,并在处理室外排出。 因此,以较少的劳动力和低成本,可以有效地实施清洁。
    • 100. 发明授权
    • Urea synthesis process and apparatus therefor
    • 尿素合成方法及其设备
    • US5936122A
    • 1999-08-10
    • US939126
    • 1997-09-26
    • Yasuhiko KojimaHidetsugu Fujii
    • Yasuhiko KojimaHidetsugu Fujii
    • B01D5/00B01J10/00B01J19/00C07C273/04C07C275/00
    • C07C273/04B01D5/0063B01J19/006B01J2219/00006B01J2219/00108B01J2219/0011B01J2219/00777
    • A vertical condenser is installed on or above a urea synthesis column to condense the mixed gas from the stripper by bringing it into contact with an absorption medium under cooling. A first down pipe for making the top part of the condenser communicate with the bottom part of the synthesis column is provided to allow the resultant condensate to flow down to the bottom part of the synthesis column by gravity. The condensate is subjected to urea synthesis together with feed ammonia or a part of feed carbon dioxide supplied thereto. The urea synthesis solution thus formed is introduced into the stripper by gravity through a second down pipe having an opening in the top part of the synthesis column. Unreacted ammonia and carbon dioxide are separated as the aforesaid mixed gas by the rest of the feed carbon dioxide and introduced into the bottom part of the aforesaid condenser so as to be condensed. Alternatively, the condensate from the vertical condenser is sucked by means of an ejector using preheated feed liquid ammonia as the driving fluid, so that it is introduced into the bottom part of the urea synthesis column and is subjected to urea synthesis.
    • 立式冷凝器安装在尿素合成塔上或上方,通过使其与冷却下的吸收介质接触而将来自汽提塔的混合气体冷凝。 提供用于使冷凝器的顶部与合成塔的底部连通的第一下管,以使所得的冷凝物通过重力向下流到合成塔的底部。 冷凝物与供给氨或供给二氧化碳的一部分进行尿素合成。 如此形成的尿素合成溶液通过重力通过在合成塔的顶部具有开口的第二下管引入汽提器。 未反应的氨和二氧化碳作为前述混合气体被剩余的进料二氧化碳分离,并被引入上述冷凝器的底部以便冷凝。 或者,来自垂直冷凝器的冷凝物借助于使用预热的进料液氨作为驱动流体的喷射器吸入,从而将其引入到尿素合成塔的底部并进行尿素合成。