Method and apparatus for recycling packaging material
AssigneeSaperatec GmbH
InventorsFlorian Lovis, Marcus Schulze
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Abstract
A method for recycling of packaging material is disclosed. The packaging material comprises a multilayer material (10) comprising a metal layer (30) and at least one polymer 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, a short-chained carboxylic acid, phosphoric acid and an alkali metal hydroxide solution.
Claims7
A method of separation of a metal layer from a polymer layer in a multilayer material comprising placing the multilayer material in a separation fluid, the separation fluid comprising a mixture of 30-60% by weight of water, and a 30-60% by weight of short-chain carboxylic acid to separate the metal layer from the polymer layer, and further comprising 0.5-5% by weight of phosphoric acid 30% solution and an 2-8% by weight of alkali metal hydroxide 33% solution to reduce dissolution of the metal layer.
Dependencies are inferred from the claim text.