The method of recovering cobalt acetate and manganese residues from the material in a thin film evaporator pta

The present invention relates to a process for recovering cobalt acetate and manganese residues from the feed PTA thin film evaporator, to give a slurry with a small amount of water and the effluent beaten resin film evaporator residue feed, the slurry was solid-liquid separation, the filtrate to sodium form cation exchange resin, after most of the resin was cooled effluent returned to feed the residue slurried lower film evaporator, a small portion of the resin using liquid effluent recovered extraction or evaporation acetate; the resin saturated resolved analytically agent is added to the precipitate was resolved agent to form a cobalt-manganese precipitate was filtered and the filter cake was washed thoroughly with water to give a mixture of cobalt Meng. Advancement of the present invention is that, by reducing one extraction raffinate, the raffinate is increased to increase the circulation acetate concentration thereby improving the economics of acetic acid recovery process, is the use of two extraction to recover energy and thereby increase the recovery of acetic acid, the third is 90% or more of a resolving agent, can be recycled, just add a small amount of a resolving agent, to the loss in operation, thus greatly improving the economics of the present invention.