公开(公告)号：WO2013171364A1

公开(公告)日：2013-11-21

申请号：PCT/FI2013/050414

申请日：2013-04-15

Applicant: METSÄ FIBRE OY

Inventor： SIXTA, Herbert ,  HUMMEL, Michael ,  IAKOVLEV, Mikhail ,  TOLONEN, Lasse

IPC: C08B37/00 ,  D21C9/00

CPC classification number: D21H17/14 ,  C08B1/003 ,  C08B37/0003 ,  C08B37/0057 ,  C08H8/00 ,  D21C9/005 ,  D21C9/086 ,  D21H11/16 ,  Y02P20/542

Abstract: A method of separating hemicellulose and cellulose by dissolution of hemicellulose from a hemicellulose-rich source, such as a pulp of any origin or from holocellulose. In the method, hemicellulose is dissolved in a solvent system comprising a cellulose solvent, which is either a ionic liquid or another direct cellulose solvent, and a molecular solvent (co-solvent), wherein said co-solvent does not dissolve cellulose, and wherein the solvent basicity and acidity of said ionic liquid or other direct cellulose solvent are adequately adjusted by the co-solvent. The present invention enables quantitative separation of cellulose and hemicellulose without any depolymerization and yield losses as occurring during conventional dissolving pulp manufacturing processes.

Abstract translation: 通过从富含半纤维素的源（例如任何来源的纸浆或全息纤维素）中溶解半纤维素来分离半纤维素和纤维素的方法。 在该方法中，半纤维素溶解在包含离子液体或其它直接纤维素溶剂的纤维素溶剂和分子溶剂（助溶剂）的溶剂体系中，其中所述助溶剂不溶解纤维素，其中 所述离子液体或其它直接纤维素溶剂的溶剂碱度和酸度通过助溶剂充分调节。 本发明能够定量分离纤维素和半纤维素，而不会在常规溶解纸浆制造过程中发生任何解聚和产率损失。