STUDIES ON CONVERSION MECHANISM IN PREPARATION OF PSEUDOBOEHMITE THROUGH NEUTRALIZATION OF NaAlO2 SOLUTION BY CO2
Yang Qinghe, Li Dadong, Zhuang Fucheng, Shi Yahua,Kang Xiaohong, Jin Zeming(Research Institute of Petroleum Processing, Beijing 100083)
The conversion mechanism of neutralization of NaAlO2 solution by CO2 for preparation of PB (pseudoboehmite) 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 NaAlO2 solution. PB could be prepared through neutralization and the product of the hydrolysis of NaAlO2 solution was aluminium trihydroxide. Besides, if the end pH was too low, sidereaction would occur which produced dawsonite.