Based on the APU® system, the AnoPur system is specifically adapted for sulfuric acid purification in aluminum anodizing. Dissolved aluminum is continuously removed from sulfuric acid used in anodizing baths to reduce the contaminants to a consistently low level. This eliminates the need for bath decanting, reduces acid purchasing costs, and ensures a consistent and predictable anodizing process.
Etching or chemical milling with caustic soda can often be the greatest operating expense in aluminum anodizing. Our CER Caustic Etch Recovery System continuously crystallizes and removes dissolved aluminum from caustic soda etchants and returns the caustic to the etching/milling tanks for reuse resulting in reduced chemical costs, waste treatment costs, and labor requirements. The separated aluminum trihydrate crystal contains a marketable and salable value.
The DPU System recovers phosphoric acid and mixed acids in aluminum finishing operations. The system combines a cation resin bed with a water elutable resin bed to economically remove dissolved aluminum from phosphoric acid rinse water, which then concentrates phosphoric acid up to 85% to be reused.