PROCESS FOR PREPARING ALPHA-HYDROXYCARBOXYLIC ACIDS
    12.
    发明申请
    PROCESS FOR PREPARING ALPHA-HYDROXYCARBOXYLIC ACIDS 审中-公开
    制备α-羟基羧酸的方法

    公开(公告)号:US20090209781A1

    公开(公告)日:2009-08-20

    申请号:US12307773

    申请日:2007-05-25

    IPC分类号: C07C67/20

    摘要: Continuous process for preparing alpha-hydroxycarboxylic esters, in which the reactants reacted are alpha-hydroxycarboxamide with an alcohol in the presence of a catalyst to obtain a product mixture which comprises alpha-hydroxycarboxylic ester, ammonia, unconverted alpha-hydroxycarboxamide and alcohol, and catalyst; wherein a′) reactant streams comprising, as reactants, an alpha-hydroxycarboxamide, an alcohol and a catalyst are fed into a pressure reactor; b′) the reactant streams are reacted with one another in the pressure reactor at a pressure in the range of 1 bar to 100 bar; c′) the product mixture which results from step b) and comprises alpha-hydroxycarboxylic ester, unconverted alpha-hydroxycarboxamide and catalyst, and also ammonia and alcohol, is discharged from the pressure reactor; and d′) the product mixture is depleted in alcohol and ammonia by distilling off ammonia at a pressure which is constantly kept greater than 1 bar without the aid of additional stripping media. The continuous process can be employed particularly advantageously on the industrial scale.

    摘要翻译: 制备α-羟基羧酸酯的连续方法,其中反应物在催化剂存在下与醇反应为α-羟基甲酰胺,得到包含α-羟基羧酸酯,氨,未转化的α-羟基甲酰胺和醇的产物混合物,以及催化剂 ; 其中包含作为反应物的α-羟基甲酰胺,醇和催化剂的')反应物料流进入压力反应器; b'),反应物流在压力反应器中在1巴至100巴范围内的压力下彼此反应; c')由步骤b)得到的包含α-羟基羧酸酯,未转化的α-羟基甲酰胺和催化剂以及氨和醇的产物混合物从压力反应器中排出; 和d'),产物混合物通过在不经额外的汽提介质的帮助下恒定地保持大于1巴的压力下蒸馏出氨而蒸出醇和氨。 该连续方法可以在工业规模上特别有利地使用。

    Process for preparing alpha-hydroxycarboxylic esters
    16.
    发明授权
    Process for preparing alpha-hydroxycarboxylic esters 失效
    制备α-羟基羧酸酯的方法

    公开(公告)号:US08569539B2

    公开(公告)日:2013-10-29

    申请号:US12298034

    申请日:2007-03-28

    IPC分类号: C07C67/20

    摘要: Alpha-hydroxycarboxylic esters are prepared by a continuous process in which alpha-hydroxycarboxamide is reacted with an alcohol in the presence of a catalyst to obtain a product mixture which contains alpha-hydroxycarboxylic ester, ammonia, unconverted alpha-hydroxycarboxamide and alcohol, and catalyst; wherein reactant streams containing an alpha-hydroxycarboxamide, an alcohol and a catalyst are fed into a pressure reactor. The reactant streams are reacted with one another in the pressure reactor at a pressure in the range of 1 bar to 100 bar; and the product mixture is depleted in alcohol and ammonia by distilling off ammonia at a pressure which is constantly kept greater than 1 bar without the aid of additional stripping media. The continuous process can be employed particularly advantageously on the industrial scale.

    摘要翻译: α-羟基羧酸酯通过连续方法制备,其中α-羟基羧酰胺与醇在催化剂存在下反应,得到含有α-羟基羧酸酯,氨,未转化的α-羟基甲酰胺和醇以及催化剂的产物混合物; 其中将含有α-羟基甲酰胺,醇和催化剂的反应物流进料到压力反应器中。 反应物流在压力反应器中在1巴至100巴范围内的压力下彼此反应; 并且通过在不经额外的剥离介质的帮助下,在恒定地保持大于1巴的压力下蒸馏掉氨,产物混合物就会耗尽醇和氨。 该连续方法可以在工业规模上特别有利地使用。

    Device for the application of compression sleeves
    19.
    发明授权
    Device for the application of compression sleeves 失效
    压缩套管的应用装置

    公开(公告)号:US07666218B2

    公开(公告)日:2010-02-23

    申请号:US11728583

    申请日:2007-03-26

    IPC分类号: A61F2/06

    CPC分类号: A61B17/128

    摘要: In a device for the installation of a compression sleeve around a blood vessel, including a guide element for holding the blood vessel, and a carrier for holding the compression sleeve in a bent-open state in which the carrier and the compression sleeve are supported at the distal end of the installation device, the installation device includes a push element for pushing the compression sleeve off the carrier while the blood vessel is disposed in the bent-open compression sleeve so that, upon its release from the carrier, the compression sleeve extends tightly around the blood vessel.

    摘要翻译: 在用于在血管周围安装压缩套筒的装置,包括用于保持血管的引导元件和用于将压缩套筒保持在弯曲打开状态的载体,其中托架和压缩套筒被支撑在 安装装置的远端,安装装置包括用于将压缩套筒从载体上推出的推动元件,同时血管设置在弯曲开口的压缩套筒中,使得当压缩套筒从托架释放时,其延伸 紧紧围绕血管。