Regeneration and recycling of contaminated solutions from aluminum and tin washer processes

摘要

A process is described for regenerating and recycling a contaminated solution recovered from an aluminum or tin washer process wherein the contaminated solution contains contaminants comprising inorganic soils, organic soils, or both as a result of the use of the solution in the washer process, which comprises (A) regenerating said solution by (A-1) extracting said contaminants from the solution in a manner which does not substantially reduce the amount of any chemicals present in the solutions prior to use; and (A-2) selectively replenishing chemicals as required; and (B) recycling the regenerated solution to the washer process. The process of the present invention significantly reduces the amount of waste water containing chemicals which must be discarded or treated in waste treatment facilities. The process also reduces the amount of process chemicals and water necessary for maintaining the washer processes used for aluminum and tin coil and container washer processes.