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    • 2. 发明授权
    • Cleaning process using phase shifting of dense phase gases
    • 使用相态气相的清洗方法
    • US5013366A
    • 1991-05-07
    • US287207
    • 1988-12-07
    • David P. JacksonOrval F. Buck
    • David P. JacksonOrval F. Buck
    • B01D11/00B01D12/00B08B7/00C23G5/00B08B3/08B08B3/12
    • B08B7/0021C23G5/00
    • A process for removing two or more contaminants from a substrate in a single process. The substrate to be cleaned is contacted with a dense phase gas at or above the critical pressure thereof. The phase of the dense phase gas is then shifted between the liquid state and the supercritical state by varying the temperature of the dense fluid in a series of steps between temperatures above and below the critical temperature of the dense fluid. After completion of each step in the temperature change, the temperature is maintained for a predetermined period of time in order to allow contact with the substrate and contaminants and removal of the contaminants. At each step in the temperature change, the dense phase gas possesses different cohesive energy density or solubility properties. Thus, this phase shifting of the dense fluid provides removal of a variety of contaminants from the substrate without the necessity of utilizing different solvents. In alternative embodiments, ultraviolet radiation, ultrasonic energy, or reactive dense phase gas or additives may additionally be used.
    • 一种在单一工艺中从基材中除去两种或更多种污染物的方法。 待清洁的基底与等于或高于其临界压力的致密相气体接触。 然后通过在高于和低于致密流体的临界温度的温度之间的一系列步骤中改变致密流体的温度,使密相气体的相位在液体状态和超临界状态之间移动。 在温度变化的每个步骤完成之后,将温度保持预定的时间段,以便与基底和污染物接触并除去污染物。 在温度变化的每个步骤中,密相气体具有不同的内聚能密度或溶解性。 因此,致密流体的这种相移提供了从基材中除去多种污染物,而不需要使用不同的溶剂。 在替代实施例中,可以另外使用紫外线辐射,超声能量或反应性致密相气体或添加剂。
    • 4. 发明授权
    • Dense fluid cleaning centrifugal phase shifting separation process and apparatus
    • 密封流体清洗离心相移分离工艺及装置
    • US06802961B2
    • 2004-10-12
    • US10221767
    • 2002-09-12
    • David P. Jackson
    • David P. Jackson
    • B08B306
    • B08B7/0021B01D11/0403B01D11/0407B01D11/048B01D17/0205B01D17/0217B01D17/04B01D17/044B01D17/048B08B3/06
    • The present invention is an apparatus and process for cleaning substrates using dense fluids under the influence of centrifugal force and dense fluid phase changes. A perforated centrifuge drum operates within a pressure vessel having drains and fill ports. System controls include a high optical sensor, a low optical sensor, a pressure transducer, and a thermocouple. An external dense fluid cleaning and management system exchanges dense fluid and gas with the pressure vessel via the drain and fill ports. Dense fluid centrifugal separations prevent pooling and supercooling of liquid carbon dioxide avoiding recontamination of the substrate. The present invention can perform solvent-aided separation processes including liquid-liquid, liquid-supercritical-fluid, froth flotation and centrifugal phase-shift separations.
    • 本发明是一种用于在离心力和致密流体相变的影响下使用致密流体清洁基底的装置和方法。 穿孔离心机鼓在具有排水口和填充口的压力容器内操作。 系统控制包括高光学传感器,低光学传感器,压力传感器和热电偶。 外部稠密流体清洗和管理系统通过排水和填充口与压力容器交换稠密的流体和气体。 密集流体离心分离防止液体二氧化碳的汇集和过冷,避免了底物的再污染。 本发明可以进行溶液辅助分离,包括液液,液 - 超临界流体,泡沫浮选和离心相移分离。