Abstract: In single column ion exchange process to produce potassium carbonate,feed liquor was seriously wasted and resin was not enough utilized,which brought lots of problems,such as high production cost,low concentration of by-produced ammonium chloride solution,and difficult recovery.In order to solve above problems,experiments were performed for producing potassium carbonate by the techniques of absorption with three serial ion-exchange columns and elution with two serial ion-exchange columns with potassium chloride and ammonium bicarbonate as raw materials and with strong acid cation exchange resin as medium of ion exchange.Results showed that by using three serial ion-exchange columns process,utilization ratios of resin and raw material，and concentration of ion-exchange liquids were improved.Furthermore,production period can be shortened and productivity can be increased.Therefore,this process can not only be applied in the production of potassium carbonate,but also provide a new idea for the improvement of other ion exchange processes.