公开(公告)号：US08298373B2

公开(公告)日：2012-10-30

申请号：US12320944

申请日：2009-02-09

Applicant: Yonghao Ni ,  Zhibin He

Inventor： Yonghao Ni ,  Zhibin He

IPC: D21C3/00

CPC classification number: D21C9/163 ,  D21C9/1036 ,  D21C9/1042 ,  D21H21/30 ,  D21H21/32

Abstract: A process for improving optical properties of high-yield pulp (HYP) for producing paper products with superior brightness. Optical brightening agents (OBAs) can effectively improve the optical properties of high-yield pulp (HYP). The present process involves incorporating the OBAs into the alkaline peroxide bleaching process. By combining peroxide bleaching with an optical brightening agent, one can decrease the bleaching cost to reach the same brightness target. Some key advantages of adding OBA to HYP at the pulp mill over the conventional wet-end addition of OBA include: i) the quenching effect on OBA by the wet-end cationic polymers such as PEI is decreased by fixing OBA on HYP fibers; ii) the negative impact of metal ions in the white water system on the OBA performance is minimized when OBA is pre-adsorbed and fixed on HYP fibers; iii) the photo-yellowing (color reversion) of HYP and HYP-containing paper sheets is decreased when more OBA is on HYP fibers to protect them from harmful UV radiation.

Abstract translation: 用于改善高产量纸浆（HYP）的光学性能的方法，用于生产具有优异亮度的纸制品。 荧光增白剂（OBA）可有效提高高产量纸浆（HYP）的光学性能。 本方法包括将OBAs掺入碱性过氧化物漂白工艺中。 通过将过氧化物漂白与荧光增白剂结合，可以降低达到相同亮度目标的漂白成本。 在OBA常规的湿法添加方面，在纸浆厂加入OBA的一些关键优点包括：i）通过将OBA固定在HYP纤维上，通过湿式阳离子聚合物如PEI对OBA的淬灭作用降低; ii）当OBA预吸附并固定在HYP纤维上时，白水系统中金属离子对OBA性能的负面影响被最小化; iii）当更多OBA在HYP纤维上以防止有害的紫外线辐射时，HYP和含HYP的纸张的光黄变（颜色反转）降低。

公开(公告)号：US08246778B2

公开(公告)日：2012-08-21

申请号：US12621615

申请日：2009-11-19

Applicant: Chen Lu ,  Janet Woodward

Inventor： Chen Lu ,  Janet Woodward

IPC: D21C5/02

CPC classification number: D21C9/1036 ,  C01B15/037 ,  D21C5/005 ,  D21C9/163

Abstract: A method is described controlling enzymatic decomposition of peroxide comprising contacting a composition containing a peroxide decomposing enzyme with an aldehyde functional polymer added in an amount effective to control the enzyme. There also is a method described for bleaching cellulose pulp, such as recycled paper pulp or other pulps, with an aldehyde functional polymer introduced in an amount effective to control peroxide decomposing enzymes present in the pulp being bleached. Paper products containing the aldehyde functional polymer used to control peroxide decomposing enzymes in a bleaching treatment of cellulose pulp are also provided.

Abstract translation: 描述了控制过氧化物酶分解的方法，包括使含有过氧化物分解酶的组合物与有效控制酶的量加入的醛官能聚合物接触。 还有一种描述用于漂白纤维素纸浆的方法，例如再生纸浆或其它纸浆，其中醛官能聚合物的引入量有效地控制存在于被漂白纸浆中的过氧化物分解酶。 还提供了含有用于控制纤维素纸浆漂白处理中的过氧化物分解酶的醛官能聚合物的纸制品。

公开(公告)号：US20120183772A1

公开(公告)日：2012-07-19

申请号：US13314493

申请日：2011-12-08

Applicant: Arthur J. Nonni ,  Charles E. Courchene ,  Christopher Michael Slone ,  Peter R. Abitz

Inventor： Arthur J. Nonni ,  Charles E. Courchene ,  Christopher Michael Slone ,  Peter R. Abitz

IPC: D01F2/00

CPC classification number: D21C9/163 ,  A61F13/53 ,  D21C9/002 ,  D21C9/1036 ,  D21C9/144 ,  D21H11/04 ,  D21H11/16 ,  D21H11/20 ,  Y10T428/298

Abstract: A modified kraft pulp fiber with unique properties is provided. The modified fiber can be a modified bleached kraft fiber that is almost indistinguishable from its conventional counterpart, except that it has a low degree of polymerization (DP). Methods for making the modified fiber and products made from it are also provided. The method can be a one step acidic, iron catalyzed peroxide treatment process that can be incorporated into a single stage of a multi-stage bleaching process. The products can be chemical cellulose feedstocks, microcrystalline cellulose feedstocks, fluff pulps and products made from them.

Abstract translation: 提供了具有独特性质的改性牛皮纸浆纤维。 改性纤维可以是经修改的漂白牛皮纸纤维，其与常规对应物几乎无法区分，只是它具有低聚合度（DP）。 还提供了制备改性纤维的方法和由其制成的产品。 该方法可以是一步酸性，铁催化的过氧化物处理过程，其可以并入多阶段漂白过程的单个阶段。 产品可以是化学纤维素原料，微晶纤维素原料，绒毛浆和由它们制成的产品。

公开(公告)号：US20110236335A1

公开(公告)日：2011-09-29

申请号：US13070123

申请日：2011-03-23

Applicant: Robert Dicosimo ,  John Edward Gavagan ,  Mark Scott Payne

Inventor： Robert Dicosimo ,  John Edward Gavagan ,  Mark Scott Payne

IPC: C12P7/40 ,  C12N15/63 ,  C12N1/00 ,  C12N9/18 ,  C07H21/04 ,  C12M1/40 ,  A01N37/16 ,  D21C9/16 ,  A61L2/16 ,  D06L3/02 ,  A01P1/00

CPC classification number: C12N9/18 ,  C11D3/38636 ,  C11D3/3945 ,  C12P7/40 ,  D21C5/005 ,  D21C9/1036

Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.

公开(公告)号：US20100084101A1

公开(公告)日：2010-04-08

申请号：US12526341

申请日：2008-01-25

Applicant: Christophe Calais ,  Dominique Lachenal ,  Gerard Mortha

Inventor： Christophe Calais ,  Dominique Lachenal ,  Gerard Mortha

IPC: D21B1/16 ,  D21C3/00

CPC classification number: D21C9/10 ,  C08B15/04 ,  C08B15/10 ,  D21C9/1036 ,  D21C9/16

Abstract: The invention relates to a method for functionalising carbohydrates, that comprises at least one step during which the carbohydrates react with an oxidizing agent in the presence of copper-phenanthroline complex. The invention more particularly relates to a method for functionalising cellulose fibers for the paper industry.

Abstract translation: 本发明涉及一种功能化碳水化合物的方法，其包括在铜 - 菲咯啉络合物存在下碳水化合物与氧化剂反应的至少一个步骤。 本发明更具体地涉及用于造纸工业的纤维素纤维的功能化方法。

公开(公告)号：US20100036113A1

公开(公告)日：2010-02-11

申请号：US12514196

申请日：2007-03-26

Applicant: Otavio Mambrim Filho ,  Rosaria Luisa Mainieri

Inventor： Otavio Mambrim Filho ,  Rosaria Luisa Mainieri

IPC: C08B1/00

CPC classification number: D21C9/1036

Abstract: The present invention relates to an improved process for processing chemical cellulose pulp wherein carboxymethylcellulose (CMC) is added during the bleaching step of said pulp. The addition of CMC in this step of the bleaching process provides a pulp with improved physical, chemical and mechanical properties.

Abstract translation: 本发明涉及一种用于处理化学纤维素纸浆的改进方法，其中在所述纸浆的漂白步骤期间加入羧甲基纤维素（CMC）。 在漂白过程的这个步骤中加入CMC提供了具有改进的物理，化学和机械性能的纸浆。

公开(公告)号：US20090183845A1

公开(公告)日：2009-07-23

申请号：US12301130

申请日：2007-05-15

Applicant: Iori Tomoda ,  Yosuke Uchida ,  Hiroyuki Nagatani ,  Ayano Kawae ,  Takahiro Cho ,  Wakana Uesugi ,  Tetsuo Koshitsuka

Inventor： Iori Tomoda ,  Yosuke Uchida ,  Hiroyuki Nagatani ,  Ayano Kawae ,  Takahiro Cho ,  Wakana Uesugi ,  Tetsuo Koshitsuka

IPC: D21C9/02 ,  D21C9/16

CPC classification number: D21C9/144 ,  D21C9/1036 ,  D21C9/1042 ,  D21C9/1084 ,  D21C9/163

Abstract: Provided are a method for producing bleached pulp, comprising processing unbleached pulp obtained by cooking a lignocellulose substance, for alkali-oxygen bleaching followed by treatment with peroxomonosulfuric acid and thereafter by multistage chlorine-free bleaching treatment starting from chlorine dioxide treatment; a method for producing bleached pulp, comprising processing the unbleached pulp for alkali-oxygen bleaching followed by chlorine-free bleaching treatment or totally chlorine-free bleaching treatment to bleach it to a degree of brightness of from 70 to 89%, and further followed by treatment with peroxomonosulfuric acid; and paper produced by the use of the bleached pulp produced according to these production methods, at a papermaking pH of at most 6. Provided are the efficient production methods for bleached pulp in which the colour reversion resistance is enhanced in chlorine-free bleaching and the bleaching cost increase is prevented, and the paper produced by the use of the bleached pulp according to an acid papermaking process.

Abstract translation: 本发明提供漂白纸浆的制造方法，其特征在于，对由木质素纤维素物质进行蒸煮而得到的未漂白纸浆进行碱氧漂白处理，然后用二氯甲烷处理开始进行多级无氯漂白处理， 一种漂白纸浆的制造方法，其特征在于，对未漂白的纸浆进行碱氧漂白处理，然后进行无氯漂白处理或全部无氯漂白处理，将其漂白至亮度为70〜89％ 用次氯酸处理; 以及通过使用根据这些生产方法生产的漂白纸制成的纸，造纸pH值至多为6.提供了在无氯漂白中提高耐逆色性的漂白纸浆的有效生产方法。 防止漂白成本增加，并且根据酸性造纸方法使用漂白纸浆生产纸。

公开(公告)号：US07510860B1

公开(公告)日：2009-03-31

申请号：US09990874

申请日：2001-11-21

Applicant: Wing L. Sung

Inventor： Wing L. Sung

IPC: C12N9/26 ,  C12P21/06 ,  D21C3/00 ,  C07H21/04

CPC classification number: C12N9/2482 ,  C12Y302/01008 ,  D21C5/005 ,  D21C9/1036

Abstract: The present invention provides a xylanase, or a modified xylanase enzyme comprising at least one substituted amino acid residue at a position selected from the group consisting of amino acid 11, 116, 118, 144 and 161, the position determined from sequence alignment of the modified xylanase with Trichoderma reesei xylanase II amino acid sequence. The xylanases described herein exhibit improved thermophilicity, alkalophilicity, expression efficiency, or a combination thereof, in comparison to a corresponding native xylanase.

Abstract translation: 本发明提供一种木聚糖酶或修饰的木聚糖酶，其在选自氨基酸11,116,118,144和161的位置包含至少一个取代的氨基酸残基，所述位置由修饰的 木聚糖酶与里氏木霉木聚糖酶II氨基酸序列。 与相应的天然木聚糖酶相比，本文所述的木聚糖酶表现出改善的嗜热性，嗜碱性，表达效率或其组合。

公开(公告)号：US20090075330A1

公开(公告)日：2009-03-19

申请号：US09990874

申请日：2001-11-21

Applicant: Wing L. Sung

Inventor： Wing L. Sung

IPC: C12N9/24 ,  C12P21/06 ,  C07H21/04 ,  C12N1/18

CPC classification number: C12N9/2482 ,  C12Y302/01008 ,  D21C5/005 ,  D21C9/1036

Abstract: The present invention provides a xylanase, or a modified xylanase enzyme comprising at least one substituted amino acid residue at a position selected from the group consisting of amino acid 11, 116, 118, 144 and 161, the position determined from sequence alignment of the modified xylanase with Trichoderma reesei xylanase II amino acid sequence. The xylanases described herein exhibit improved thermophilicity, alkalophilicity, expression efficiency, or a combination thereof, in comparison to a corresponding native xylanase.

Abstract translation: 本发明提供一种木聚糖酶或修饰的木聚糖酶，其在选自氨基酸11,116,118,144和161的位置包含至少一个取代的氨基酸残基，所述位置由修饰的 木聚糖酶与里氏木霉木聚糖酶II氨基酸序列。 与相应的天然木聚糖酶相比，本文所述的木聚糖酶表现出改善的嗜热性，嗜碱性，表达效率或其组合。

公开(公告)号：US07368036B2

公开(公告)日：2008-05-06

申请号：US10505815

申请日：2003-03-05

Applicant: Jeffrey S. Tolan ,  Corina Popovici

Inventor： Jeffrey S. Tolan ,  Corina Popovici

IPC: D21C9/10 ,  D21C9/14

CPC classification number: D21C5/005 ,  D21C9/10 ,  D21C9/1036 ,  D21C9/14

Abstract: 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.

Abstract translation: 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。