公开(公告)号：WO2023073538A1

公开(公告)日：2023-05-04

申请号：PCT/IB2022/060221

申请日：2022-10-25

Applicant: STORA ENSO OYJ

Inventor： LJUNGQVIST, Carl-Henrik ,  TOLLNERIUS, Lena ,  BACKFOLK, Kaj

IPC: D21B1/32 ,  D21B1/02 ,  B32B27/10

Abstract: The present invention relates to a method for manufacturing a purified fiber fraction from used beverage carton (UBC), said method comprising the steps: a) subjecting UBC starting material to a polymer and aluminum film separation method to obtain a UBC polymer and aluminum fraction and a raw UBC fiber fraction; b) optionally subjecting the raw UBC fiber fraction to a coarse screening method to remove coarse particles; c) subjecting the raw UBC fiber fraction to a fine screening method to remove cellulose fines and fine particulate contaminants, wherein the fine screening method comprises at least one fine screening step and at least one washing step; d) optionally subjecting the fine screened UBC fiber fraction to a washing method to remove further contaminants; e) optionally subjecting the fine screened UBC fiber fraction to a bleaching method; f) subjecting the fine screened, and optionally bleached, UBC fiber fraction to a dewatering method to a consistency of at least wt%; and g) subjecting the dewatered UBC fiber fraction to deactivation to obtain a purified 20 UBC fiber fraction.

公开(公告)号：EP4423331A1

公开(公告)日：2024-09-04

申请号：EP22886261.1

申请日：2022-10-25

Applicant: Stora Enso Oyj

Inventor： LJUNGQVIST, Carl-Henrik ,  TOLLNERIUS, Lena ,  BACKFOLK, Kaj

IPC: D21B1/32 ,  D21B1/02 ,  B32B27/10

CPC classification number: Y02W30/64 ,  D21B1/32 ,  D21B1/02