METHOD OF IMPROVING THE PURITY OF ALKALI-METAL HYDROXIDES.
    1.
    发明公开
    METHOD OF IMPROVING THE PURITY OF ALKALI-METAL HYDROXIDES. 失效
    VERFAHREN ZUR VERBESSERUNG DER REINHEIT VON ALKALIMETALALDOXOXYDEN。

    公开(公告)号:EP0165945A4

    公开(公告)日:1986-07-17

    申请号:EP85900029

    申请日:1984-12-24

    摘要: In a method for increasing the purity of alkali metal hydroxides, alkaline earth metal compounds are used to render contaminants insoluble, thereby lessening the entry of contaminants into a solution of alkali-metal hydroxide, or promoting removal of contaminants from a contaminated solution of alkali-metal hydroxide. The invention is particularly applicable to increasing the purity of alkali metal hydroxides regenerated from the spent liquor resulting from sulphur-free alkaline pulping of wood or of other natural material containing cellulose fibres.

    摘要翻译: 在提高碱金属氢氧化物纯度的方法中,使用碱土金属化合物来使污染物不溶,从而减少污染物进入碱金属氢氧化物溶液,或促进污染物从碱金属氢氧化物污染溶液中除去, 金属氢氧化物 本发明特别适用于提高由木材或含纤维素纤维的其他天然材料的无硫碱性制浆产生的废液再生的碱金属氢氧化物的纯度。