Process for delamination of laminated packaging
AssigneeAshutosh Mukhopadhyay
InventorAshutosh Mukhopadhyay
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Abstract
The present invention relates to a delamination method for recovering constituents of a paper-based multi layered laminated packaged waste. The method comprises using of a mixture of inorganic bases to separate the constituents of the packaged waste and recover paper, plastic and/or aluminium components separately. The paper can be recovered as pulp, the plastic can be recovered as is, and the aluminium can be recovered as a water soluble salt. The delamination method of the present invention is also effective on cardboard-based multi layered laminated packaged waste.
Claims9
A process for recovery of constituents of multi-layered laminated packaging waste, said process comprising the steps of:
- treating said multi-layered laminated packaging waste with a mixture of inorganic bases proportioned to dissolve bonding between said constituents;
- and
- separating said constituents from each other,
- wherein the mixture of inorganic bases comprises sodium sulfite, sodium sulfate and sodium hydroxide.
Dependencies are inferred from the claim text.