(过量NaOH) AlCl3+4NaOH=NaAlO2+3NaCl+2H2O FeCl3+3NaOH=Fe(OH)3+3NaCl (过滤除去Fe(OH)3）(再加适量HCl,Al3+有损耗)NaAlO2+HCl+H2O=Al(OH)3+NaCl(过滤再加盐酸得AlCl3溶液,蒸发得AlCl3）满意吗....