Dynamics of quantum discord in the purification process

► We investigate the dynamics of quantum discord during the purification process. ► In the case of Werner states, it is shown that quantum discord is increased after a round of purification protocol. ► We call this process quantum correlation purification in analogy with entanglement purification. ► Furthermore, quantum mutual information and classical correlation is also increased during this process. ► We also give an analytic expression for a class of higher dimensional states which have additive quantum discord.