REMOVAL OF METAL IONS FROM A POLYMER
A schematic diagram of the plant is shown, with temperatures at each point of the system. Water is supplied at 15°C and is first heated by the water coming out of the cell. It then passes to a second heat exchanger where it is heated by oil to 180°C before passing through the cell. On leaving the cell, the water is cooled by the incoming water.
The process is a low volume and high value and only 200 kg are processed in one batch. The cell has a volume of 700 L and the flow rate of water is 16 L per minute. 5 m3 of water are required for each batch of material. The plant is constructed of stainless steel.
A picture of the plant before cladding is shown above with the vessel, hopper, cold-water tank and ion exchange cylinders (for purifying the water) labelled. The heat exchangers are behind the bottom of the vessel and the oil heater is behind the product-collecting bath. A large compressor is required to dry the product after extraction.