Abstract：
:High-alkali low-temperature polysulfide pulping (HALT) was effectively utilised to prevent major polysaccharide losses while maintaining the delignification rate. A yield increase of 6.7 wt% on wood was observed for a HALT pulp compared to a conventionally produced kappa number 60 pulp with comparable viscosity. Approximately 70% of the yield increase was attributed to improved galactoglucomannan preservation and 30% to cellulose. A two-stage oxygen delignification sequence with inter-stage peroxymonosulphuric acid treatment was used to ensure delignification to a bleachable grade. In a comparison to conventional pulp, HALT pulp effectively maintained its yield advantage. Diafiltration trials indicate that purified black liquor can be directly recycled, as large lignin fractions and basically all dissolved polysaccharides were separated from the alkali-rich BL.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Paananen M,Sixta Hdoi
10.1016/j.biortech.2015.06.075subject
Has Abstractpub_date
2015-10-01 00:00:00pages
97-102eissn
0960-8524issn
1873-2976pii
S0960-8524(15)00866-4journal_volume
193pub_type
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