In plenty industrial processes, such as stamping aluminum profiles, it is necessary to clean the matrices and other elements from aluminum remains. This process is done through using strongly alkalic sodium hydroxide (NaOH) solutions, in temperature of approximately 70-80°C. Dissolved aluminum joins the solution, and the sodium hydroxide, which was used mainly for the sake of solution alkalization, is left mostly unconsumed by the process. After the proces, such strongly alkalic solution must be utilized. Effectively, industrial plants suffer both the steep costs associated with purchasing the necessary sodium hydroxide and ones connected to utilizing the left over waste.

In collaboration with Mann+Hummel, we offer technology allowing for recovery of sodium hydroxide from the working solution. The technology is based on a specific combination of membranes, where some are used for removing the mechanical pollution, and the rest for separating sodium hydroxide from the other pollutants. Due to the process requirements, this process is carried out in a high temperature. The cleaned hydroxide can be reused. Simultaneously, a lower concentration of sodium hydroxide in the utilized solution reduces the costs of waste processing and is helpful for the environment.

If you’re interested in utilizing the recovery technology in your plant, contact our technological branch.