Solution | Product, Process


Acid regeneration system enabling recovery of waste acid components created through pickling of stainless steel.

The pickling process, used by stainless steel manufacturers to remove metal impurities, is highly polluting and operationally expensive. This solution reduces both the environmental and operational costs.

Globally, 300,000 liters of mixtures of nitric and hydrofluoric acid are used for pickling processes every hour and turned into large amounts of waste acid. This process causes significant problems to the environment and very high operational costs for manufacturers. The REGMAX innovative process combines gentle drying of liquid acid wastes in a first step and a pyrohydrolysis reaction in a second step. The waste acid is vaporized and separated into gaseous acid and metal salts. Recovered acid is reused for pickling while the metal oxides can be reused for steel production, and drastically reduces environmental impact and operational costs.

Key features for a positive impact on quality of life

  • REGMAX is the only system which enables total recovery of acid wastes
  • Water waste reduction by 99%
  • Toxic sludge reduction by 100%
  • Hydrofluoric acid reduction by 99%
  • Nitric acid reduction by 97%


  • Acid related OPEX costs of pickling reduced by up to 91 %

The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances.


3400, Austria

Activity regions
Central America, Kenya, Uganda, Algeria, Egypt, Libya, Morocco, Tunisia, Swaziland, South Africa, Nigeria, Senegal, Argentina, Brazil, Chile, Guyana, Peru, Uruguay, Venezuela, Canada, United States, China, Japan, South Korea, Taiwan, Bangladesh, India, Iran, Pakistan, Indonesia, Cambodia, Laos, Malaysia, Philippines, Thailand, Vietnam, Cyprus, Israel, Iraq, Saudi Arabia, Syria, Turkey, Bulgaria, Belarus, Czechia, Hungary, Poland, Romania, Russia, Slovakia, Ukraine, Åland, Denmark, Estonia, Finland, United Kingdom, Ireland, Norway, Sweden, Spain, Greece, Croatia, Italy, Portugal, Serbia, Slovenia, Austria, Belgium, Switzerland, Germany, France, Luxembourg, Netherlands, Australia, New Zealand,

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Solutions helps to achieve these SDG's.

  • Clean water and sanitation

  • Industry, innovation and infrastructure

  • Responsible consumption and production

Maturity stage

Looking for

Clients to use the REGMAX system. Increased visibility. Investors looking to invest in the solution.

Networking partner

Categories of application
Wastewater treatment, Toxin and waste minimization, Automation, Industrial raw material efficiency, Industrial water efficiency, Supply chain efficiency, Materials reclamation, Waste treatment, Waste management,

  • Regmax Acid regeneration system enabling recovery of waste acid components created through pickling of stai...
Acid regeneration system enabling recovery of waste acid components created through pickling of stai...
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