A process for the recovery of lithium carbonate from lithium-containing battery residues by means of CO2 treatment

The invention relates to a process for the production of lithium carbonate from lithium-containing battery and / or Akkumulatorruckstanden, comprising the steps of a) Fine grain size reduction of lithium-containing electrolyte material b) digestion of the fine-grained electrolyte material in aqueous suspension under pressure with CO c) concentrating the solution and precipitation of the lithium carbonate lithiumhydrogencarbonathaltigen wherein the digestion of the fine-grained electrolyte material in an aqueous suspension with a mass ratio of the solid / water of 1: 1 to 1: 100 and at a pressure of 20 to 50 bar takes place.