Separation fluid, method and apparatus for recycling multilayer material using a passivation agent
AssigneeSaperatec GmbH
InventorMarcus Schulze
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Abstract
A method for recycling of multilayer material is disclosed. The multilayer material (10) comprises a metal layer (30) and at least one further layer (20, 40). The method comprises placing the packaging material in a vat (310) comprising a separation fluid (330) to produce a mixture of metal shreds from the metal layer (30), plastic shreds from the polymer layer (20, 40) and residual components. The separation fluid comprises a mixture comprising a mixture of water, carboxylic acid, carboxylate salt and passivation agent for passivating the surface of the metal layer.
Claims12
A separation fluid for separating multilayer systems containing at least one metal layer and one further layer, the separation fluid comprising a mixture of water, carboxylic acid, carboxylate salt and passivation agent, wherein the passivation agent is a phosphate, phosphonate, phosphinate salt or a mixture thereof, wherein the separation fluid has a pH value of between 1.5 and 5.
Dependencies are inferred from the claim text.