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NaAlO2 溶液和CO2 在低温下成胶,生成的沉淀为无定形氢氧化铝、拟薄水铝石或三水氧化铝; 加入一定量的NH4 HCO3 , 控制一定的时间、温度和压力,氢氧化铝与NH4HCO3 作用生成片钠铝石NH4Al(OH)2CO3 , 经高温焙烧后可制得孔容为0-6 ~1-5 ml/g 的大孔容氧化铝.
NaAlO2 solution and CO2 gel at low temperature, the resulting precipitate is amorphous aluminum hydroxide, pseudo-boehmite or alumina trihydrate; adding a certain amount of NH4 HCO3, control a certain time, temperature and pressure, aluminum hydroxide With the role of NH4HCO3 to produce dawsonite NH4Al (OH) 2CO3, calcined at high temperature can be obtained pore volume of 0-6 ~ 1-5 ml / g of macroporous alumina.