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    • 8. 发明申请
    • TREATMENT OF WOOD CHIPS USING ENZYMES
    • 用酶处理木屑
    • WO2007035481A1
    • 2007-03-29
    • PCT/US2006/036031
    • 2006-09-15
    • ENZYMATIC DEINKING TECHNOLOGIES, L.L.C.WANG, Xiang, H.MA, Jian, HuaJIANG, Cheng, LiangBROWN, William, D., Jr.
    • WANG, Xiang, H.MA, Jian, HuaJIANG, Cheng, LiangBROWN, William, D., Jr.
    • D21C5/00
    • D21C5/005
    • A method of treating wood chips or saw dust with an enzyme formulation, prior to refining, in order to reduce the total extractives content of the wood chips or sawdust and to modify the wood structure is described herein. The wood chips or sawdust are treated with one or more enzymes such as lipases, esterases, pectinases, cellulases, laccases, hemicellulases and combinations thereof. The enzyme formulation can be applied to the surface of the wood chips or sawdust, e.g. by spraying, or can be impregnated into the wood chips. The enzyme formulation can further comprise one or more surface active agents which can enhance the effectiveness of the enzyme treatment by improving the diffusion or impregnation of the enzymes into the wood chips. The enzyme-based treatment can be applied at any of several different locations prior to the pulping process including chip piles, chip conveyors, chip silos, chips washers, chip washer water stream, impregnation liquor, or during chip storage. The enzyme-based treatment is quick and easy to apply in most commercial mill operations. The enzyme-based treatment is effective at temperatures from about 20°C to about 100°C, preferably from about 35°C to about 70°C. The wood chips or saw dust can be treated for a period of time from about 0.10 to about 200 hours, more preferably from about 10 to about 72 hours. The addition of the enzyme formulation into the wood chip or sawdust pile increases the concentration of pitch-degrading enzymes on the chip or dust surfaces which can significantly accelerate the degradation of pitch components inside the chips or sawdust. Decreasing the total extractives content of the wood chips and modifying the structure of the wood chips or sawdust leads to a decrease in the apparent pitch content during pulping and in reduced energy requirements, increased paper strength, improved paper machine runability, and lower costs associated with paper manufacturing.
    • 本文描述了在精制之前用酶制剂处理木屑或锯屑以减少木屑或锯屑的总提取物含量和改变木结构的方法。 用一种或多种酶如脂肪酶,酯酶,果胶酶,纤维素酶,漆酶,半纤维素酶及其组合来处理木屑或锯屑。 酶制剂可以施用于木屑或锯屑的表面,例如, 通过喷雾,或可以浸渍到木片中。 酶制剂还可以包含一种或多种表面活性剂,其可以通过改进酶扩散或浸渍到木片中来增强酶处理的有效性。 基于酶的处理可以在制浆过程之前的几个不同位置的任何位置施加,包括芯片堆,切屑输送机,芯片筒仓,切屑洗涤机,切屑清洗机水流,浸渍液或芯片存储期间。 基于酶的处理在大多数商业轧机操作中快速且容易地应用。 基于酶的处理在约20℃至约100℃,优选约35℃至约70℃的温度下是有效的。 木屑或锯屑可以处理约0.10至约200小时,更优选约10至约72小时的时间段。 将酶制剂添加到木屑或锯屑堆中增加了芯片或灰尘表面上的沥青降解酶的浓度,这可以显着加速芯片或锯屑中沥青组分的降解。 减少木片的总提取物含量和改变木屑或锯屑的结构导致制浆期间表观间距含量的降低以及能量需求降低,纸张强度增加,造纸机运行性能降低以及与 纸制造。