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US 2026/0084347 A1Published application
Purification method for producing a polyolefin regenerate
AssigneeAlpla Werke Alwin Lehner GmbH & Co. KG
InventorMichael HEYDE
Life of this patent
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Abstract
A purification method for producing a polyolefin (PO) regenerate (r), including (a) mixing superficially cleaned PO waste (p), referred to as raw polymer (p), with solvent and dissolving the raw polymer (p) in the solvent, (b) recovering the purified polymer from the solvent, (c) preparing the solvent, (d) returning the solvent to step (a), (e) separating residues (e1, e2), and (f) extruding the purified PO regenerate (r) to form pellets (r). Step (c) is carried out using at least one membrane filter (c1).
Claims13
-12. (canceled)
A purification method for producing a polyolefin (PO) regenerate (r), comprising:
- (a) mixing superficially cleaned PO waste (p), referred to as raw polymer (p), with solvent, and dissolving the raw polymer (p) in the solvent,
- (b) recovering the purified polymer from the solvent,
- (c) preparing the solvent,
- (d) returning the solvent to step (a),
- (e) separating residues (e1, e2), and
- (f) extruding the purified PO regenerate (r) to form pellets (r),
- wherein
- the solvent and the raw polymer dissolved therein are fed to a membrane filter (c1) and separated in the membrane filter (c1) into a solvent-containing retentate and a solvent-containing permeate.
5 more elements
Dependencies are inferred from the claim text.