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1. 发明授权

US07320741B2 Method of xylanase treatment in a chlorine dioxide bleaching sequence 失效
标题翻译：在二氧化氯漂白顺序中木聚糖酶处理方法
公开(公告)号：US07320741B2
公开(公告)日：2008-01-22
申请号：US10466640
申请日：2002-01-18
申请人： Jeffrey S. Tolan , Corina Popovici , Luc Thibault
发明人： Jeffrey S. Tolan , Corina Popovici , Luc Thibault
IPC分类号： D21C3/18
CPC分类号： D21C9/1057 , D21C5/005
摘要： A method of bleaching chemical pulp with xylanase after chemical bleaching is provided. The method comprises the steps of exposing chemical pulp to a chlorine dioxide bleaching stage to produce a partially bleached pulp, treating the partially bleached pulp with a xylanase in an enzyme treatment stage at a pH of about 3 to about 8, then carrying out an alkaline extraction of the pulp. The pulp bleaching method of the present invention may be performed in a pulp mill as part of a complex pulp bleaching process.
摘要翻译：提供了化学漂白后用木聚糖酶漂白化学纸浆的方法。该方法包括以下步骤：将化学纸浆暴露于二氧化氯漂白阶段以产生部分漂白的纸浆，在约3至约8的pH的酶处理阶段用木聚糖酶处理部分漂白的纸浆，然后进行碱提取纸浆。本发明的纸浆漂白方法可以在纸浆厂中进行，作为复杂纸浆漂白方法的一部分。

2. 发明授权

US07541175B1 Alkaline extraction stages comprising xylanase 有权
标题翻译：碱性提取阶段包括木聚糖酶
公开(公告)号：US07541175B1
公开(公告)日：2009-06-02
申请号：US10451308
申请日：2001-12-19
申请人： Jeff Tolan , Corina Popovici , Patrick J. Foody
发明人： Jeff Tolan , Corina Popovici , Patrick J. Foody
IPC分类号： D21C3/18
CPC分类号： D21C9/1057 , D21C5/005
摘要： The invention can be summarized as follows. There is provided a method of bleaching chemical pulp comprising the steps of exposing chemical pulp to a chemical bleaching state to produce a partially bleached pulp and treating the partially bleached pulp with a thermophilic, alkalophilic xylanase in an alkaline extraction stage at pH of 8 to 14. The method may be performed in a mill and may form part of a more complex pulp bleaching process. The invention also relates to the use of a thermophilic, alkalophilic xylanase in an alkaline extraction stage of a pulp bleaching process in a mill.
摘要翻译：本发明可概括如下。提供了一种漂白化学纸浆的方法，包括以下步骤：将化学纸浆暴露于化学漂白状态以产生部分漂白的纸浆，并在pH为8至14的碱性萃取阶段中用嗜热的嗜碱性木聚糖酶处理部分漂白的纸浆该方法可以在磨机中进行，并且可以形成更复杂的纸浆漂白过程的一部分。本发明还涉及在磨机中在纸浆漂白过程的碱性萃取阶段中使用嗜热的嗜碱性木聚糖酶。

3. 发明申请

US20050150619A1 Xylanase treatment of chemical pulp 有权
标题翻译：木聚糖酶处理化学纸浆
公开(公告)号：US20050150619A1
公开(公告)日：2005-07-14
申请号：US10505815
申请日：2003-03-05
申请人： Jeffrey Tolan , Corina Popovici
发明人： Jeffrey Tolan , Corina Popovici
IPC分类号： D21C5/00 , D21C9/10 , D21C9/12 , D21C9/14
CPC分类号： D21C5/005 , D21C9/10 , D21C9/1036 , D21C9/14
摘要： The present invention discloses methods of bleaching chemical pulp that use xylanase enzymes after chemical bleaching. The method comprises the steps of carrying out a chlorine dioxide stage to produce a partially bleached pulp, treating the partially bleached pulp with a xylanase enzyme, optionally in the presence of oxygen and hydrogen peroxide, in a mild extraction stage, then bleaching the pulp with a second chlorine dioxide stage. The method allows the mill to decrease the usage of sodium hydroxide or other alkali, while decreasing the use of chlorine dioxide, and possibly improving the yield and strength of the pulp, while maintaining a similar level of bleached brightness of the pulp. The pulp bleaching method of the present invention may be performed in a pulp mill as part of a complex pulp bleaching process.
摘要翻译：本发明公开了化学漂白后使用木聚糖酶的漂白化学纸浆的方法。该方法包括以下步骤：进行二氧化氯阶段以产生部分漂白的纸浆，在温和萃取阶段任选在氧气和过氧化氢存在下，用木聚糖酶处理部分漂白的纸浆，然后用纸浆漂白纸浆第二个二氧化氯阶段。该方法允许研磨机降低氢氧化钠或其他碱的用量，同时减少二氧化氯的使用，并且可能提高纸浆的产率和强度，同时保持纸浆的漂白亮度相似水平。本发明的纸浆漂白方法可以在纸浆厂中进行，作为复杂纸浆漂白方法的一部分。

4. 发明授权

US07368036B2 Xylanase treatment of chemical pulp 有权
标题翻译：木聚糖酶处理化学纸浆
公开(公告)号：US07368036B2
公开(公告)日：2008-05-06
申请号：US10505815
申请日：2003-03-05
申请人： Jeffrey S. Tolan , Corina Popovici
发明人： Jeffrey S. Tolan , Corina Popovici
IPC分类号： D21C9/10 , D21C9/14
CPC分类号： D21C5/005 , D21C9/10 , D21C9/1036 , D21C9/14
摘要： The present invention discloses methods of bleaching chemical pulp that use xylanase enzymes after chemical bleaching. The method comprises the steps of carrying out a chlorine dioxide stage to produce a partially bleached pulp, treating the partially bleached pulp with a xylanase enzyme, optionally in the presence of oxygen and hydrogen peroxide, in a mild extraction stage, then bleaching the pulp with a second chlorine dioxide stage. The method allows the mill to decrease the usage of sodium hydroxide or other alkali, while decreasing the use of chlorine dioxide, and possibly improving the yield and strength of the pulp, while maintaining a similar level of bleached brightness of the pulp. The pulp bleaching method of the present invention may be performed in a pulp mill as part of a complex pulp bleaching process.
摘要翻译：本发明公开了化学漂白后使用木聚糖酶的漂白化学纸浆的方法。该方法包括以下步骤：进行二氧化氯阶段以产生部分漂白的纸浆，在温和萃取阶段任选在氧气和过氧化氢存在下，用木聚糖酶处理部分漂白的纸浆，然后用纸浆漂白纸浆第二个二氧化氯阶段。该方法允许研磨机降低氢氧化钠或其他碱的用量，同时减少二氧化氯的使用，并且可能提高纸浆的产率和强度，同时保持纸浆的漂白亮度相似水平。本发明的纸浆漂白方法可以在纸浆厂中进行，作为复杂纸浆漂白方法的一部分。

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