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Ken, wow - that sounds like very useful advice. I will need some time to follow up on this one but I'll let you know eventually how it all worked out. If that approach works, our customer will be very pleased ... and I'll score big with my boss ;-> Rainer

Aaron, Unfortunately, the plant produces off site and is fed with acids from various sources. We therefore need to accept the spent acid as it is delivered and we have no influence on the upstream processes. Eletrowinnig may be one way to process spent acids but our plant uses an evaporator...

Hi there, we are successfully runnig a vacuum evaporation plant for spent hydrochloric acids from zinc galvanizing plants in Switzerland. As the liquid evaporates we are able recover a high quality FeCl2 as crystallized product. Only after ZnCl2 also begins to precipitate, the residual...