A method and apparatus for regenerating a working solution used in the purification of salt is provided. The salt is lixiviated in an extraction chamber using fresh working solution supplied from a reservoir. The contaminants in the salt are transferred to the working solution to purify the salt. The used working...

Method and apparatus for batch and semi-batch operation of membrane system using a sweep stream with essentially repeating process flows is disclosed. The method and apparatus are used for separating a source liquid into its constituent solvents and solutes. The method includes circulating a feed stream and sweep st...

A method and device for continuous batch separation where batch reset time is eliminated is provided. Separation is achieved in passes employing more than one liquid container or chamber. First pass begins with batch feed solution from a source reservoir, the feed solution flows from the source reservoir, undergoes ...