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Diffusiondilalyzer ACILYZER

Separation units to separate ions of acids and salts through ion exchange membranes by concentration of solution. The units are applicable for recovery and/or purification of free acids from sulfuric-, chloric-, nitric-, fluoric-acid waste and recovery of alkali.

Principle

Diffusion Dialysis is a method for recovering free acid using a concentration difference as its driving force at both side of solution between which Ion Exchange Membrane is placed.
Usually continuous operation of pickling bath allows reduction of free acid concentration and increase of dissolved metal content which results in decrease of pickling performance.
When the Diffusiondialyzer is equipped in this case, it can separate free acid from the mixed solution of metal and acid to maintain acid and metal content at a constant level. The recovered acid is returned to the pickling bath and recycled.

Fig.4 Flow Daigram of Diffusiondialysis

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Feature

1	Since a concentration difference is a driving force for mass transfer, Diffusion-dialysis gives low operation cost and provides cost effective process.
2	Continuous operation of Diffusiondialyzer can maintain the content of free acid and dissolved metals at a constant level and can maintain the pickling bath in a good condition.
3	Recovery and recycling of free acid can reduce the cost of neutralization process.
4	As the Diffusiondialyzer unit is fully automated, no man power is required.
5	A simple structure of the equipment provides ease of maintenance.