REMOVING DCS FROM ASPEN BCTMP WITH Mg, Al-HYDROTALCITE-LIKE COMPOUNDS
High yield pulp, HYP, or bleached chemi- thermomechanical pulp, BCTMP, has found many applications in the production of various paper grades. However, compared with bleached kraft pulps, it usually contains more dissolved and colloidal substances (DCS) that can affect the papermaking process negatively. In this study, Mg, Al-hydrotalcitelike compound (HTLc) and its calcined product CHTLc) were employed to remove DCS from an aspen BCTMP. Results show that the anionic dissolved organic substances and can be removed by HTLc. The colloidal substances can also be effectively removed when the concentration of the HTLc exceeds 300 mg/l. In-situ re-construction of CHTLc to HTLc provides larger capacity to remove the dissolved and colloidal substances; however, the re-construction is a slow process under the conditions studied.
DCS BCTMP Mg Al-hydrotalcite-like compound calcined hydrotalcite-like compound
Liu Wenxia Ni Yonghao
Limerick Pulp & Paper Centre, University of New Brunswick, Fredericton, NB, Canada Key Lab of Paper Limerick Pulp & Paper Centre, University of New Brunswick, Fredericton, NB, Canada
国际会议
广州
英文
775-778
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）