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    • 2. 发明授权
    • Method for precipitation of small medicament particles into use containers
    • 将小药物颗粒沉淀到使用容器中的方法
    • US07744923B2
    • 2010-06-29
    • US11870554
    • 2007-10-11
    • Roger A. RajewskiBala SubramaniamFenghui Niu
    • Roger A. RajewskiBala SubramaniamFenghui Niu
    • A61K9/14
    • A61K9/1688B01J2/02B01J2/04B01J2/18
    • Commercially feasible methods for lyophobic precipitation of liquid-dispersed or dissolved material (e.g., medicaments) are provided wherein a plurality of individual, open containers (22) each containing a quantity (84) of a solution or dispersion are treated within a common pressurizable chamber (12). In this process, desired near-supercritical or supercritical temperature and pressure conditions are established for a selected antisolvent gas such as carbon dioxide, and an ultrasonic device (14) is actuated to generate high energy ultrasonic waves in the chamber (12). This leads to intense mixing of the antisolvent with the liquid solution or dispersion within the containers (22), with consequent solvent removal and material precipitation.
    • 提供了用于液体分散或溶解的材料(例如药物)的疏液沉淀的商业上可行的方法,其中每个含有(84)溶液或分散体的多个单独的开放容器(22)在共同的可加压室 (12)。 在这个过程中,为所选择的反溶剂气体例如二氧化碳建立了所需的近临界或超临界温度和压力条件,并且致动超声波装置(14)以在腔室(12)中产生高能超声波。 这导致反溶剂与容器(22)内的液体溶液或分散体的强烈混合,随后进行溶剂去除和材料沉淀。
    • 7. 发明授权
    • Methods for a particle precipitation and coating using near-critical and
supercritical antisolvents
    • 使用近临界和超临界反溶剂进行颗粒沉淀和涂层的方法
    • US5833891A
    • 1998-11-10
    • US805215
    • 1997-02-27
    • Bala SubramaniamSaid SaimRoger A. RajewskiValentino Stella
    • Bala SubramaniamSaid SaimRoger A. RajewskiValentino Stella
    • A61K9/16A61K9/50B01J2/04B05D1/02B01D11/00
    • A61K9/1676A61K9/1688B01J2/04B05D1/025A61K9/1694A61K9/5089B05D2401/90
    • Improved methods and apparatus for particle precipitation and coating using near- or supercritical fluid conditions are described. A fluid dispersion having a continuous phase dispersant and at least one precipitatable substance therein is contacted with a supercritical fluid (SCF) antisolvent so as to generate focused high frequency antisolvent sonic waves, breaking up the dispersion into extremely small droplets; the enhanced mass transfer rates between the droplets and the antisolvent causes precipitation of very small particles on the order of 0.1-10 .mu.m. In coating processes, a turbulent fluidized flow of core particles is created using an SCF antisolvent in an enclosed zone. The core particles are contacted therein at near- or supercritical conditions by a fluid dispersion containing a dispersant together with a precipitatable substance. The antisolvent depletes the dispersant and the substance is precipitated onto the fluidized core particles. In another aspect of the invention, a process for preparing and administering a medicament using only a single container is provided. In such method, a fluid dispersion having a dispersant with the medicament therein is contacted with an antisolvent at near- or supercritical conditions within a use container, so as to directly precipitate small particles of the medicament in the container. The antisolvent is then removed and the use container is sealed with the medicament particles therein. Thereafter, dose(s) of the medicament can be withdrawn from the use container and administered to a patient.
    • 描述了使用近或超临界流体条件改进颗粒沉淀和涂层的方法和装置。 具有连续相分散剂和至少一种可沉淀物质的流体分散体与超临界流体(SCF)反溶剂接触,以产生聚焦的高频反溶剂声波,将分散体分解成极小的液滴; 液滴和抗溶剂之间的增强的传质速率导致非常小的颗粒的沉淀约0.1-10μm。 在涂覆过程中,使用封闭区域中的SCF反溶剂产生核心颗粒的湍流流化流。 核心颗粒在近或超临界条件下通过含有分散剂和可沉淀物质的流体分散体接触。 反溶剂消耗分散剂,物质沉淀在流化核心颗粒上。 在本发明的另一方面,提供了仅使用单一容器制备和施用药物的方法。 在这种方法中,将具有药物的分散剂的流体分散体与使用容器内的近临界或超临界条件下的反溶剂接触,从而将药物的小颗粒直接沉淀在容器中。 然后将抗溶剂除去,并将使用容器用其中的药物颗粒密封。 此后,药物的剂量可以从使用容器中取出并给予患者。