【摘要】 探讨了ＮａＡｌＯ２ＣＯ２法制备拟薄水铝石（Ｐｓｅｕｄｏｂｏｅｈｍｉｔｅ（ＰＢ），即αＡｌＯ（ＯＨ），也称一水氧化铝，也有写Ａｌ２Ｏ３·Ｈ２Ｏ）过程中的转化机理，经大量实验证实在ＮａＡｌＯ２ＣＯ２法成胶过程中存在两种生成水合氧化铝的平行反应，即ＮａＡｌＯ２溶液的中和反应和水解反应，中和反应可以制备拟薄水铝石，水解反应则生成三水氧化铝（Ｂａｙｅｒｉｔｅ，即β１Ａｌ（ＯＨ）３或β１Ａｌ２Ｏ３·３Ｈ２Ｏ）．此外，若在成胶过程中终点ｐＨ值控制得较低，则发生复合反应生成丝钠铝石．更多还原

【Abstract】 The conversion mechanism of neutralization of NaAlO2 solution by CO2 for preparation of PB (pseudoboehmite) was discussed. Experimental results proved that there were two parallel reactions during precipitation, which could produce aluminium hydroxide. The two kinds of reaction were the neutralization and the hydrolysis of NaAlO2 solution. PB could be prepared through neutralization and the product of the hydrolysis of NaAlO2 solution was aluminium trihydroxide. Besides, if the end pH was too low, sidereaction would occur which produced dawsonite.更多还原