Making PIN FRs from salt production waste

EU LIFE project MareMag plans to produce magnesium hydroxide (MDH) from bittern waste liquor, from salt works. MDH is a widely used inorganic PIN flame retardant, which protects from fire by absorbing heat (decomposition energy) and releasing water and is compliant with LSZH requirements (Low Smoke Zero Halogen). Because table salt production works remove calcium from seawater, magnesium recovery from bittern generates a purer magnesium hydroxide than production from seawater, as well as valorising the bittern waste stream.

“How the MAREMAG LIFE project plans to bring green magnesium to our lives with LIFE close-to-market support”, EU CINEA 11_11_2025 https://cinea.ec.europa.eu/news-events/news/how-maremag-life-project-plans-bring-green-magnesium-our-lives-life-close-market-support-2025-11-11_en

LIFA MareMag project website (in Italian) “Sustainable and circular marine magnesium” https://www.maremag.it/