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本研究采用碳质高岭石(陕西蒲白5号煤夹矸)作为起始原料,经脱碳活化处理后所得的白土在氢氧化钠碱性溶液中进行低温水热反应人工合成NaA型沸石。较适宜的合成条件为:H_2O/Na_2O=40～55,Na_2O/SiO_2=1,胶凝60℃、2h,晶化90℃、3h。综合晶化过程中固相的微观形貌观察、红外光谱分析和液相组份变化的测定结果,可以认为:利用碳质高岭土(蒲白5号煤夹矸)经水热反应合成NaA型沸石的机理为液相转化机理。
In this study, carbonaceous kaolinite (Shaanxi Pu Bai # 5 coal gangue) as a starting material, after decarburization activated clay obtained in alkaline solution of sodium hydroxide at low temperature hydrothermal reaction of synthetic zeolite NaA . The suitable synthesis conditions are as follows: H 2 O / Na 2 O = 40-55, Na 2 O / SiO 2 = 1, gelled 60 ℃, 2h, crystallization 90 ℃, 3h. According to the results of the observation of the microstructure of the solid phase, the infrared spectrum and the determination of the change of the liquid phase composition, it can be considered that the NaA zeolite was synthesized by hydrothermal reaction using carbonaceous kaolin (Pu Ba 5 coal gangue) The mechanism of liquid phase transformation mechanism.