过氧化氢湿式氧化脱除铝酸钠溶液中有机物的动力学研究

摘要

拜耳法铝酸钠溶液中的有机物影响氧化铝的正常生产。采用过氧化氢湿式氧化法，在低温、常压条件下，研究了对铝酸钠溶液中有机物的脱除动力学。结果表明，溶液中过氧化氢浓度是影响氧化反应速率的主要因素；氧化反应速率与溶液中有机物浓度遵循一级反应关系，动力学方程为－d[C]dt ＝3．45×107 e－61260．63RT [C][H2 O2]1．30。模拟计算值与试验值相关性较好，建立的动力学方程能较好地反映实际情况。%In bayer process ,the negative impacts are usually caused by organics in sodium aluminate solution .The kinetics of wet oxidation organics in industrial sodium aluminate solution is researched at l room temperature and atmospheric conditions .T he results show that the oxidation reaction rate and organics concentration is accorded with a first‐order reaction .The kinetic equation of the oxidation reaction is established as-d[C]dt =3 .45 × 107 e- 61 260 .63RT [C][H2 O2 ]1 .30 . The experimental data coincides well with simulation calculation data .The mathematical kinetics equation can reflect the truth .