Method for preventing polymerization of (meth)acrylic acid and esters thereof and method for the production thereof
    1.
    发明授权
    Method for preventing polymerization of (meth)acrylic acid and esters thereof and method for the production thereof 失效
    防止(甲基)丙烯酸及其酯的聚合的方法及其制备方法

    公开(公告)号:US06599397B2

    公开(公告)日:2003-07-29

    申请号:US09875541

    申请日:2001-06-06

    IPC分类号: B01D300

    CPC分类号: C07C51/50 C07C57/04

    摘要: This method of preventing polymerization of methacrylic acid inn the process of its production is characterized by comprising using, in a refining column, a combination of N-nitrosophenylhydroxylamine or salt thereof with an N-oxyl compound, an N-hydroxy-,2,2,6,6-tetramethylpiperidine compound and a 2,2,6,6-tetramethylpiperidine compound. In this method, N-nitrosophenylhydroxylamine or a salt thereof rises inside a refining column under splitting part thereof to effectively inhibit polymerization of (meth)acrylic acid or the like. The above polymerization in both vapor and liquid phases can be inhibited more effectively by the combined use of the compounds mentioned above.

    摘要翻译: 这种防止甲基丙烯酸在其生产过程中聚合的方法的特征在于包括在精炼塔中使用N-亚硝基苯基羟胺或其盐与N-氧基化合物,N-羟基 - ,2,2' 6,6-四甲基哌啶化合物和2,2,6,6-四甲基哌啶化合物。 在该方法中,N-亚硝基苯基羟胺或其盐在分解部分的内部在精炼塔内升高,有效抑制(甲基)丙烯酸等的聚合。 通过上述化合物的组合使用,可以更有效地抑制气相和液相中的上述聚合。

    Immunological blood test method
    2.
    发明授权
    Immunological blood test method 失效
    免疫血液检测方法

    公开(公告)号:US4200434A

    公开(公告)日:1980-04-29

    申请号:US881051

    申请日:1978-02-24

    IPC分类号: G01N33/53 G01N33/50 G01N33/16

    CPC分类号: G01N33/50 Y10S436/807

    摘要: A method for immunological blood testing carried out by the use of a coil column, composed of a transparent tube helically wound on a support rod. To carry out the test, the coil column filled with a liquid solution of a polymer compound is, after a droplet of blood to be tested has been introduced into the liquid solution within the tube, centrifuged while undergoing a planetary motion to allow erythrocytes to sediment.

    摘要翻译: 一种免疫血液检测方法,通过使用由螺旋形缠绕在支撑杆上的透明管构成的线圈柱进行。 为了进行试验,填充有高分子化合物的液体溶液的盘管柱在被测试的一滴血液已经被引入管内的液体溶液中之后,经过行星运动离心以使红细胞沉降 。