The corrosion metals existed in commercial catalyst systems for the production of acetic acid, so the effects of corrosion metals on methanol carbonylation to acetic acid were investigated. The influence of Fe or Ni on the catalytic activity and selectivity of iridium-based or rhodium-based catalysts was studied by adding Fe(OAc)2 or Ni( OAc)2 in batch autoclave. The effects of corrosion metal on the stability of main catalyst were compared under the simulation industrial flash evaporation condition in the parallel reactor. The results showed that corrosion metals such as Fe or Ni could improve the carbonylation reactivity of rhodium-based catalyst system with low concentration of Fe or Ni, and reduce obviously the reaction rate in iridium-based catalyst system. The existence of Fe or Ni in rhodium-based or iridium-based catalyst systems had adverse effects on CO utilization rate and catalyst stability for methanol carbonylation.%结合工业生产催化体系中存在的腐蚀金属,研究了其对羰基合成醋酸反应的影响.在高压反应釜中,通过添加不同浓度的醋酸亚铁或醋酸镍考察腐蚀金属铁和镍对铑基催化剂和铱基催化剂反应活性和选择性的影响,并利用平行反应器在模拟闪蒸条件下考察腐蚀金属对主催化剂稳定性的影响.结果表明,少量腐蚀金属铁或镍的存在对铑催化羰基合成醋酸的反应活性有一定的促进作用,但在铱催化体系中铁和镍的存在对活性有明显的抑制作用.而铁和镍的存在,对铑或铱催化羰化反应的CO利用率和催化剂的稳定性均有不利影响.
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