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    • 2. 发明申请
    • TREATMENT OF PULP WITH A MANNANASE IN A BLEACHING PROCESS
    • 在漂白过程中处理具有甘露聚糖的纸浆
    • WO1995014809A1
    • 1995-06-01
    • PCT/FI1994000522
    • 1994-11-22
    • VALTION TEKNILLINEN TUTKIMUSKESKUSSUURNÄKKI, AnnaSIIKA-AHO, MattiBUCHERT, JohanaVIIKARI, Liisa
    • VALTION TEKNILLINEN TUTKIMUSKESKUS
    • D21C09/10
    • D21C5/005
    • The present invention relates to a process for preparing a bleached cellulose pulp. In particular, the invention relates to a process for enhancing the enzymatic treatment of a cellulose pulp prior to bleaching, whereby the cellulose pulp is treated with an enzyme preparation having mannanase activity. According to the invention, the cellulose pulp is brought to a low kappa number prior to bleaching: softwood pulp is cooked to a kappa number below 20 and hardwood pulp to a kappa number below 15. Preferably, the cellulose pulp is brought to the desired kappa number by continuous MC cooking, superbatch cooking, RHD (Rapid Displacement Heating) in combination with extended cooking, isothermal cooking (ITC), or EMC cooking. The obtained pulp is bleached after the enzymatic treatment, preferably by a bleaching sequence totally free of chlorine chemicals.
    • 本发明涉及一种漂白纤维素浆的制备方法。 特别地,本发明涉及在漂白之前增强纤维素纸浆的酶处理的方法,由此用具有甘露聚糖酶活性的酶制剂处理纤维素纸浆。 根据本发明,在漂白之前使纤维素纸浆达到低卡帕值:软木浆被煮制成低于20的卡伯值和硬木浆至卡巴数15以下。优选地,使纤维素纸浆达到所需的卡帕值 数字通过连续的MC烹饪,超级烹饪,RHD(快速置换加热)结合延长烹饪,等温烹饪(ITC)或EMC烹饪。 所得纸浆在酶处理后漂白,优选通过完全不含氯化学品的漂白顺序漂白。