Method for the purification of acetaminophen
    1.
    发明授权
    Method for the purification of acetaminophen 失效
    对乙酰氨基酚净化方法

    公开(公告)号:US06277783B1

    公开(公告)日:2001-08-21

    申请号:US09363932

    申请日:1999-07-30

    IPC分类号: B01J2002

    CPC分类号: B01J20/20 C07C231/24

    摘要: A method is provided for purifying a crude N-acetyl-para-aminophenol (APAP) containing color bodies or their precursors, the method comprising: a) forming a hot aqueous solution of the crude APAP; and b) subsequently contacting the hot solution with an acid washed adsorbent carbon, e.g., an activated carbon, which acid washed carbon, prior to such contact, has been pretreated by contacting it with an aqueous solution of a reducing sulfite.

    摘要翻译: 提供了一种纯化含有着色体或其前体的粗N-乙酰基对氨基苯酚(APAP)的方法,该方法包括:a)形成热APAP的热水溶液; 和b)随后使热溶液与酸洗的吸附剂碳(例如活性炭)接触,所述吸附剂碳例如活性炭,在这种接触之前该酸洗碳已经通过使其与还原性亚硫酸盐的水溶液接触而被预处理。

    Method for the purification of acetaminophen
    2.
    发明授权
    Method for the purification of acetaminophen 失效
    对乙酰氨基酚净化方法

    公开(公告)号:US5981799A

    公开(公告)日:1999-11-09

    申请号:US213375

    申请日:1994-03-15

    CPC分类号: B01J20/20 C07C231/24

    摘要: A method is provided for purifying a crude N-acetyl-para-aminophenol (APAP) containing color bodies or their precursors, the method comprising: a) forming a hot aqueous solution of the crude APAP; and b) subsequently contacting the hot solution with an acid washed adsorbent carbon, e.g., an activated carbon, which acid washed carbon, prior to such contact, has been pretreated by contacting it with an aqueous solution of a reducing sulfite.

    摘要翻译: 提供了一种纯化含有着色体或其前体的粗N-乙酰基对氨基苯酚(APAP)的方法,该方法包括:a)形成热APAP的热水溶液; 和b)随后使热溶液与酸洗的吸附剂碳(例如活性炭)接触,所述吸附剂碳例如活性炭,在这种接触之前该酸洗碳已经通过使其与还原性亚硫酸盐的水溶液接触而被预处理。