公开(公告)号：US11613849B2

公开(公告)日：2023-03-28

申请号：US17001449

申请日：2020-08-24

申请人： INTERNATIONAL PAPER COMPANY

发明人： Peter M. Froass

IPC分类号： D21H11/04 ,  D21H17/66 ,  D21C9/10 ,  D21C9/16 ,  D21C9/14 ,  D21H11/20 ,  D21C11/08 ,  D21H21/32 ,  D21H21/24 ,  D21C9/00 ,  D21H21/14 ,  D21H17/00

摘要： The present technology is directed to fluff pulps with improved odor control as well as methods of making such fluff pulps. A fluff pulp is provided that includes a bleached kraft fiber and a copper ion content from about 0.2 ppm to about 50 ppm by weight of the bleached kraft fiber. The bleached kraft fiber includes a length-weighted average fiber length of at least about 2 mm, a copper number of less than about 7, a carboxyl content of more than about 3.5 meq/100 grams; an ISO brightness of at least 80; and a viscosity from about 2 cps to about 9 cps.

公开(公告)号：US20220349123A1

公开(公告)日：2022-11-03

申请号：US17868234

申请日：2022-07-19

申请人： The Procter & Gamble Company

发明人： Phillip Richard Green ,  Raul Victorino Nunes ,  Nicholas William Geary ,  Khosrow Parviz Mohammadi

IPC分类号： D21C9/16 ,  D21C9/14

摘要： A process for bleaching trichome fibers individualized from a trichome source, such as a leaf and/or a stem, is disclosed. The process of bleaching degrades trichome associated protein. Further, the bleaching processes improves the color of the trichomes.

公开(公告)号：US20220220225A1

公开(公告)日：2022-07-14

申请号：US17610170

申请日：2020-05-08

申请人： Aalto University Foundation sr

发明人： Timo Pääkkönen ,  Eero Kontturi

IPC分类号： C08B15/04 ,  D21C9/00 ,  D21C9/14

摘要： According to an example aspect of the present invention, there is provided a method of treating, such as hydrolysing, a cellulosic material, comprising: preparing a mixture comprising or consisting of a cellulosic material and a chlorite containing water solution, such as a chlorite salt containing water solution; acidifying said mixture.

公开(公告)号：US20200332087A1

公开(公告)日：2020-10-22

申请号：US16954608

申请日：2018-12-17

申请人： SCG Packaging Public Company Limited

发明人： Pim-on Rujitanaroj ,  Kasinee Thitiwutthisakul ,  Phungjai Tinnasulanon ,  Thipnakarin Boonfueng ,  Nikorn Laocharoen ,  Ramiro Rojas ,  Lars Berglund

IPC分类号： C08L1/02 ,  C08L97/00 ,  D21H11/20 ,  D21H11/18 ,  D21B1/02 ,  D21H11/02 ,  D21C9/14 ,  D21C3/20 ,  D21H19/34

摘要： The present invention relates to a lignin-containing cellulose nanofiber characterized in that (a) the said lignin-containing cellulose nanofiber has a content of carboxyl group in a range of 0.2-1.5 mmol/g, (b) the said lignin-containing cellulose nanofiber has Zeta potential in a range of −100 to −35 mV, and (c) the said lignin-containing cellulose nanofiber has an average diameter in a range of 3-30 nm. In addition, the present invention further relates to a paper and a film comprising the said lignin-containing cellulose nanofiber. The present invention also relates to a process for preparing a lignin-containing cellulose nanofiber comprising steps of (i) treating a lignin-containing cellulosic material with an organic solvent, (ii) treating the cellulosic material treated from the step (i) with derivative of N-oxy radical compound and hypochlorite compound, and (iii) mechanical treating the cellulosic material treated from the step (ii).

公开(公告)号：US10414651B2

公开(公告)日：2019-09-17

申请号：US15228629

申请日：2016-08-04

申请人： The Trustees of Princeton University

发明人： John T. Groves ,  Roy Xiao

IPC分类号： C01B11/02 ,  B01J31/22 ,  B01J31/26 ,  A61L2/18 ,  D21C9/14 ,  C07F15/02 ,  C02F1/76 ,  C02F103/02

摘要： Methods, kits, cartridges, and compounds related to generating chlorine dioxide by exposing ClO2− to at least one of an iron porphyrin catalyst or an iron porphyrazine catalyst are described.

公开(公告)号：US10400392B2

公开(公告)日：2019-09-03

申请号：US14875055

申请日：2015-10-05

申请人： VALMET AUTOMATION OY

发明人： Arvo Rahikkala ,  Kari Lampela

IPC分类号： D21C9/10 ,  D21C9/02 ,  D21C9/14 ,  D21C9/12 ,  D21H21/32

摘要： A bleaching apparatus comprises a measurement chamber has a first substance, the amount of the first substance in the measurement chamber being known. A dosing unit inputs a second substance to the measurement chamber for causing a chemical reaction between the first substance and the second substance, one of the first substance and the second substance being chlorine dioxide and another of the first substance and the second substance being filtered sample from pulp slurry of a pulp process. At least one sensor performs detection of a property known to depend on the chemical reaction between the first substance and the second substance as a function of time. A data processing unit determines chemical demand of chlorine dioxide for washing loss in a bleaching sub-process on the basis of at least one value in the detected property within a known period of time after the input of the second substance.

公开(公告)号：US20190242060A1

公开(公告)日：2019-08-08

申请号：US16236093

申请日：2018-12-28

申请人： International Paper Company

发明人： Mengkui Luo ,  Venketa Ranganathan Parthasarathy

IPC分类号： D21C9/14 ,  D21H13/08

CPC分类号： D21C9/144 ,  D21H13/08

摘要： Compositions including treated Kraft pulp, useful for making rayon fibers, having a lower degree of polymerization, a high R18, a low hemicellulose content, and high reactivity, are described. Methods of making the compositions are also described.

公开(公告)号：US10294613B2

公开(公告)日：2019-05-21

申请号：US15659178

申请日：2017-07-25

申请人： GP Cellulose GmbH

发明人： Arthur J. Nonni ,  Charles E. Courchene ,  Philip R. Campbell ,  Steven C. Dowdle ,  Joel M. Engle ,  Christopher M. Slone

IPC分类号： D21C9/12 ,  D21C9/14 ,  D21H11/04 ,  D21C9/147

摘要： A bleached softwood kraft pulp fiber with high alpha cellulose content and increased brightness and whiteness is provided. Methods for making the kraft fiber and products made from it are also described.

公开(公告)号：US20190136450A1

公开(公告)日：2019-05-09

申请号：US16239865

申请日：2019-01-04

申请人： GP CELLULOSE GmbH

发明人： Arthur J. NONNI ,  Charles E. COURCHENE ,  Blair Roderick CARTER

IPC分类号： D21C9/16 ,  C08B15/04 ,  D21C9/14 ,  D21C3/02 ,  C08B15/00 ,  D21C9/147 ,  D21C9/00 ,  D21H11/20

摘要： A pulp fiber with an enhanced carboxyl content resulting in improved antimicrobial, anti-yellowing and absorptive properties. Methods for making the kraft pulp fiber and products made from it are also described.

公开(公告)号：US10106927B2

公开(公告)日：2018-10-23

申请号：US14293749

申请日：2014-06-02

申请人： GP Cellulose GmbH

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

IPC分类号： D21C9/16 ,  D21C9/10 ,  D21C9/00 ,  D21H11/04 ,  D21H11/16 ,  A61F13/53 ,  D21H11/20 ,  D21C9/14

摘要： 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.