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高岭土、膨润土、伊利石等粘土矿物经一定浓度的硫酸处理后,化学组成发生明显变化,提高酸浓度,粘土的Al~(3+)和OH~-离子溶出量相对增加,Si/Al比提高.不同浓度硫酸溶液处理所得粘土样品的X射线衍射图,其(∞1)和(hkl)k=3n的衍射峰强度随酸浓度的提高而减弱,并在酸浓度增至一定值时消失;k≠3n的衍射峰受酸浓度的影响较小.Al~(3+)溶出造成粘土组成和结构变化,并可引起表面活性变化.
After the clay minerals such as kaolin, bentonite and illite were treated with certain concentration of sulfuric acid, the chemical composition changed obviously. With the increase of acid concentration, the amount of dissolved Al ~ (3+) and OH ~ - ions in clay increased and the Si / Al ratio increased The XRD patterns of (∞1) and (hkl) k = 3n diffraction peaks of clay samples treated with different concentrations of sulfuric acid solution decreased with the increase of acid concentration and disappeared when the acid concentration increased to a certain value. The diffraction peak of k ≠ 3n is less affected by the acid concentration, and the dissolution and dissolution of Al 3+ causes the composition and structure of the clay to change and the surface activity changes.