| 摘要 |
PURPOSE:To increase the uranium-adsorbing velocity by adding acrylic fiber having a specified fiber length and fineness into a methanol solution containing hydroxylamine, by heating said solution while stirring to change said fiber into the amidoxime and at the same time by molding said amidoxime into a globular shape. CONSTITUTION:The acrylic fiber having 5-30 mm fiber length and >=3d fiber diameter is added into the methanol solution containing hydroxylamine, and is heated while stirring to change said acrylic fiber into the amidoxime and at the same time to mold said amidoxime into a globular matter, thus the globular adsorbent is obtained. The resultant globular shape can also be surface- treated with a hydrophilic binder. The content of hydroxylamine in the solvent solution is generally about 1-5 wt% and the weight ratio of the acrylic fiber to hydroxyl amine is about 1:1-1:2. Methanol, methanol-water, etc., are used as the solvent.
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