Process for bleaching cellulose with organic peracid
    1.
    发明授权
    Process for bleaching cellulose with organic peracid 失效
    用有机过酸漂白纤维素的方法

    公开(公告)号:US4400237A

    公开(公告)日:1983-08-23

    申请号:US232217

    申请日:1981-02-06

    IPC分类号: D21C9/16

    CPC分类号: D21C9/16

    摘要: Cellulose is bleached by means of an organic peracid in the acid region and subsequently by means of peroxide in the alkaline region. As peracid there is employed an acid which is produced from the corresponding carboxylic acid by reaction with hydrogen peroxide in the presence of a mineral acid. The peroxide bleaching step which follows the peracid bleaching step is carried out after there is added the necessary amount of aqueous alkali solution for carrying out the peroxide bleaching step of the pulp without intermediate washing of the cellulose. A further addition of peroxide is not carried out.

    摘要翻译: 纤维素通过有机过酸在酸性区域中漂白,随后通过碱性区域中的过氧化物漂白。 作为过酸,使用在无机酸存在下与过氧化氢反应由相应的羧酸生成的酸。 在过量漂白步骤之后的过氧化物漂白步骤在添加必需量的碱性水溶液以进行纸浆的过氧化物漂白步骤之后进行,而不中间洗涤纤维素。 不进一步加入过氧化物。