酸浸处理对凹凸棒石黏土性能的影响

Effect of Sulfuric Acid Treating on Properties of Attapulgite Clay

以江苏盱眙凹凸棒石黏土为原料,用酸浸法提纯凹凸棒石黏土,分析了提纯过程中工艺条件对凹凸棒石比表面积的的影响;用TEM对凹凸棒石黏土提纯前后的结构和形貌进行了表征。结果表明:当凹凸棒石酸浸的条件为:硫酸浓度60%,酸浸时间2.5h,酸浸温度80℃时,比表面积提高到407m2/g,孔体积0.073cm3/g,平均孔径0.57nm;

The attapulgite clay was purified by the method of acid leaching which from Xuyi Jiangsu. The effect of processing condition of purifying on specific surface area of attapulgite clay was analyzed. The result indicated that when the acid leaching condition were as follows： sulfuric concentration was 60%, the time of acid leaching was 2.5h, the temperature of acid leaching was 80℃, the specific surface area of attapulgite increased to 407m^2/g, pore volume 0.073cm^3/g, average diameter 0.57nm.