苯基膦酸单酯合成及浮选非硫化矿的结构-性能关系研究

来源期刊：中南大学学报(自然科学版)1989年第4期

论文作者：林强 卓志云 吉干芳 王淀佐

文章页码：367 - 374

关键词：浮选药剂； 锡石； 黑钨矿/苯基膦酸单烷基酯； 结构—性能关系

Key words：flotation reagent； cassiterite； wolframite/phosphonic acid ester； strucuture-reactivity relationship

摘    要：膦酸单酯是酸性磷（膦）酸（酯）中现尚未见有文献记载的一类新型非硫化矿捕收剂,本文报道了6个苯基膦酸单酯化合物的合成,即:PhP（O）（OR）OH,a:R=C₂H₅-,b:R=C₄H₉-,c:R=s-C₄H₉-,d:R=t-C₄H₉-,e:R=C₆H₁₃-,f:R=C₈H₁₇-。测试了它们在不同浓度时水溶液的表面张力和对锡石、黑钨矿、赤铁矿、方解石和石英的浮选行为。实验结果表明苯基膦酸单酯是一类良好的非硫化矿捕收剂;烃基长度对药剂捕收活性影响极大,实验获得的最适烃链长度与按王淀佐提出的公式nφ=Δx_R²+Δx_M²计算预测值吻合;对药剂非极性基支链化引起的浮选性能差异进行了探讨,认为这些差异主要由空间位阻效应所决定。

Abstract: Alkyl phenyphosphonates (including six compounds: C₆H₅P（O）（OR）OH: a: R = C₂H₅; b:R = C₄H₉; c: R = s - C₄H₉; d: R = t - C₄H₉; e: R = C₆H₁₃; f: R = C₈H₁₇) as collectors for nonsul-fide were synthesized, their surface tension and floability for cassiterite, wolframite, hematite,calcite as well as for quartz were tested. Chain length of the reagents has a strong effect on theirreactivity. The proper chain length determined from experiments are well consistent with WangDianzuo’s formula nφ =△x_R² + △x_M². Difference of reactivity between these reagents caused bybranch chain was discussed. Steric effect is considered as the main factor in various structureeffects.