公开(公告)号：SE546694C2

公开(公告)日：2025-02-11

申请号：SE2330272

申请日：2023-06-09

Applicant: STORA ENSO OYJ

Inventor： LINDSTRÖM MATS ,  WALTER STEPHAN ,  OLSSON VILHELM

IPC: C01B32/05 ,  C01B32/312 ,  C07G1/00 ,  C08H7/00 ,  H01M4/133 ,  H01M4/583

Abstract: The present invention relates to a method for producing a carbon enriched material, said method comprising the steps of: a) providing lignin; b) mixing the lignin with a recirculated carbon enriched material fraction to obtain a lignin-carbon mixture; c) forming an agglomerated lignin-carbon composite material comprising lignin, the recirculated carbon enriched material fraction and optionally at least one additive; d) subjecting the agglomerated lignin-carbon composite material to heat treatment at one or more temperatures in the range of from 300 to 1500°C, wherein the heat treatment is carried out for a total time in the range of from 30 minutes to 10 hours, so as to obtain a carbon enriched material; e) milling the obtained carbon enriched material to so as to reduce the average particle size of the carbon enriched material, and to obtain at least a first fraction of a carbon enriched material, and a second fraction of a carbon enriched material; and f) recirculating at least a part of the first fraction obtained in step e) to step b).