Effective methods for the recycling of industrial waste acid

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Using an anion exchange membrane to recover waste acid is an effective method for treating acidic wastewater in industry. The diffusion dialysis method (ion membrane method) for recovering waste acid utilizes the principle of dialysis, with concentration gradients serving as the driving force. The membrane of this product and its associated equipment are primarily used for the separation and purification of mixtures of acids and metal salts; it represents an excellent choice in the field of waste acid treatment. It offers advantages such as simple operation, energy and resource savings, and no secondary pollution. The recovered acid can be reused, while the residue left after acid separation can be used to extract useful metals. It is widely used in various industries that emit acidic waste, such as the steel industry, titanium dioxide industry, hydrometallurgical copper processing industry, titanium processing industry, electroplating industry, wood saccharification industry, rare earth industry, and other non-ferrous metal smelting industries. The types of acids that can be recovered include sulfuric acid, hydrochloric acid, HF, nitric acid, acetic acid, etc., while the metal ions involved mainly include transition metal ions, rare earth ions, as well as magnesium and calcium. This device can achieve a recovery rate of over 80% for acids, and a removal rate of over 90% for metal ions.