Reaction Of Mg²⁺ And Palygorskite Under Hydrothermal System

Palygorskite clay was collected from Guanshang deposits in Mingguang, Anhui and montmorillonite was produced by Wuhuatianbao company in Chifeng, Inner Mongolia. Palygorskite clay, montmorillonite and their mixtures reacted with different concentrations of MgCl2.6H2O, Mg(OH)2and different proportions at different temperatures, reaction times.Those samples crystal structure, crystal morphology, solution Mg2+concentration and pH value was studied with X-ray powder diffraction (XRD), field emission scanning electron microscope (FE-SEM), Atomic absorption spectrophotometer, and atomic fluorescence spectroscopy (AFS) which explores the influence of palygorskite’s crystal growth, montmorillonite stability and Relations between attapulgite and montmorillonite. The results indicated that:(1) The samples after the reaction of palygorskite clay with3g Mg(OH)2showed that the palygorskite crystal structure is destroyed, prompting into smectite or serpentine and Solution pH increases from9.22to10.28.(2) samples after the reaction of palygorskite clay with3g MgCl2-6H2O at range of70oC200oC showed that the palygorskite has Growth Phenomenon but the growth is slow. Add the amount of magnesium chloride effect on the growth of attapulgite obvious, but little reaction temperature and time.(3) Montmorillonite with the Mg (OH)2in the hydrothermal reaction system, resulting in the destruction of the crystal structure of the sheet montmorillonite, into a lump. And crystal edges prensent curling phenomenon with3gMgCl2-6H2O.