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    • 3. 发明授权
    • Method for enrichment and purification of aqueous hydrogen peroxide
solution
    • 富含和纯化过氧化氢水溶液的方法
    • US5456898A
    • 1995-10-10
    • US303834
    • 1994-09-09
    • Shigeki ShimokawaYoshitsugu MinamikawaSeishi Murakami
    • Shigeki ShimokawaYoshitsugu MinamikawaSeishi Murakami
    • C01B15/013C01B15/01
    • C01B15/013C01B15/0135
    • Proposed is an improvement in a method for the preparation of an enriched and purified aqueous hydrogen peroxide solution from a crude aqueous hydrogen peroxide solution comprising the steps of evaporating the crude aqueous hydrogen peroxide solution in an evaporator into vapor with accompanying liquid in the form of a mist, separating the vapor from the mist of liquid in a gas-liquid separator and subjecting the vapor to fractionating distillation in a fractionating distillation column in order to greatly upgrade the product solution relative to the impurity content. The improvement is achieved by subjecting the crude aqueous hydrogen peroxide solution, prior to introduction into the evaporator, to a contacting treatment with a porous synthetic adsorbent resin to remove organic impurities from the crude aqueous hydrogen peroxide solution to such an extent that the crude aqueous hydrogen peroxide solution after the contacting treatment contains organic impurities in an amount not exceeding 50 ppm by weight calculated as organic carbon. Although the mechanism is not well understood, the preliminary removal of organic impurities from the crude aqueous hydrogen peroxide solution has an effect of greatly increasing the efficiency of gas-liquid separation of the vapor accompanied by a mist of liquid in the gas-liquid separator to decrease the amount of contaminant impurities introduced into the distillation column as carried by the mist.
    • 提出了从粗制过氧化氢水溶液制备富集和纯化的过氧化氢水溶液的方法的改进,包括以下步骤:将蒸发器中的粗过氧化氢水溶液蒸发成蒸汽,伴随液体为 在气 - 液分离器中分离蒸气与液雾的蒸气,并在分馏蒸馏塔中对蒸汽进行分馏,以相对于杂质含量大大提升产物溶液。 改进之处在于,将粗水过氧化氢溶液在引入蒸发器之前,与多孔合成吸附剂树脂进行接触处理以从粗过氧化氢水溶液中除去有机杂质,使得粗制氢水 接触处理后的过氧化物溶液含有不超过作为有机碳计算的50重量ppm的有机杂质。 虽然机理尚不清楚,但是从粗过氧化氢水溶液中初步除去有机杂质具有大大提高伴随气液分离器中的液体雾气的气液分离效率, 减少由雾气引入到蒸馏塔中的污染物杂质的量。