Abrégé

The present invention provides a system and method for the production of potash from agricultural waste. The method comprises discharging impure potash into a leaching zone, passing the leached potash through a thickener, carbonating, filtering and passing the solution through an ion exchange column, passing to an activated carbon bed, crystallizing the potassium bicarbonate, filtering the crystals and regenerating potassium carbonate in a heating zone. The system comprises a leaching tank, a thickener, a carbonation column, a first filter, an ion exchange column, an activated carbon bed, a crystallizer, a second filter, and an oven.

Classes IPC  ?

• C01D 7/12 - Préparation de carbonates à partir de bicarbonates
• B01D 11/02 - Extraction par solvants de solides
• B01D 9/02 - Cristallisation à partir de solutions
• C01D 7/22 - Purification