Process for improving productivity of carbonylation catalyst solution

摘要

In the present invention, there is disclosed a process for improving the productivity of a carbonylation catalyst solution under low water conditions, said solution containing rhodium and alkali metal components and further containing corrosion metal contaminants, which process comprises intimately contacting the catalyst solution with an ion exchange resin and a sufficient amount of water to optimize removal of corrosion metals from the catalyst solution and, recover a catalyst solution of reduced corrosion metal contaminant content, wherein water concentration in the catalyst solution ranges within 0.25 to 50 percent by weight and in preferred embodiment said ion exchange resin is represented by a strong-acid cation exchange resin in the lithium form.