Karen E Maurer

US Patent:

20070119556, May 31, 2007

Filed:

Jan 24, 2007

Appl. No.:

11/657272

Inventors:

Zheng Tan - Mason OH, US
Xuan Nguyen - Cincinnati OH, US
Karen Maurer - Liberty Township OH, US

International Classification:

D21C 9/00

US Classification:

162009000, 162078000, 162024000, 604378000

Abstract:

A method for alteration of the morphology of cellulose fibers, particularly softwood fibers, by (a) subjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about 1 and about 9, preferably between 3 and 7, and (b) subjecting the treated fibers to a refining treatment thereby converts SW fibers to HW-like fibers in many respects. The metal ion-activated peroxide treatment has been noted to act on pulp cellulose and hemi-cellulose, causing oxidation and oxidative degradation of cellulose fibers. The chemical treatment of the pulp, taken alone, is not sufficient to attain the desired modification of the morphology of the fibers, however, subsequent refining or like mechanical treatment of the chemically-treated fibers to achieve a given degree of refinement of the fibers requires dramatically less refining energy to achieve a desired end point of refinement and to impart other desirable properties to the pulp. A pulp of modified SW fibers and a mixture of HW fibers and modified HW fibers are disclosed.

US Patent:

20090054863, Feb 26, 2009

Filed:

May 16, 2008

Appl. No.:

12/152829

Inventors:

Zheng Tan - Mason OH, US
Xuan Nguyen - Cincinnati OH, US
Karen L. Maurer - Liberty Township OH, US

International Classification:

A61F 13/51
D21C 3/00
C08B 1/00

US Classification:

604378, 162 78, 536 56, 428401

Abstract:

A method for alteration of the morphology of cellulose fibers, particularly softwood fibers, by (a) subjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about I and about 9, preferably between 3 and 7, and (b) subjecting the treated fibers to a refining treatment thereby converts SW fibers to HW-like fibers in many respects. The metal ion-activated peroxide treatment has been noted to act on pulp cellulose and hemi-cellulose, causing oxidation and oxidative degradation of cellulose fibers. The chemical treatment of the pulp, taken alone, is not sufficient to attain the desired modification of the morphology of the fibers, however, subsequent refining or like mechanical treatment of the chemically-treated fibers to achieve a given degree of refinement of the fibers requires dramatically less refining energy to achieve a desired end point of refinement and to impart other desirable properties to the pulp. A pulp of modified SW fibers and a mixture of HW fibers and modified HW fibers are disclosed.

US Patent:

20140000825, Jan 2, 2014

Filed:

Sep 4, 2013

Appl. No.:

14/017954

Inventors:

XUAN T. NGUYEN - Cincinnati OH, US
KAREN MAURER - Liberty Twp OH, US

Assignee:

INTERNATIONAL PAPER COMPANY - Memphis TN

International Classification:

D21C 9/00

US Classification:

162 78, 162100, 162141

Abstract:

A method for alteration of the morphology of cellulose fibers, particularly softwood fibers, by (a) subjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about 1 and about 9, preferably between 3 and 7, and (b) subjecting the treated fibers to a refining treatment thereby converts SW fibers toHW-like fibers in many respects. The metal ion-activated peroxide treatment has been noted to act on pulp cellulose and hemi-cellulose, causing oxidation and oxidative degradation of cellulose fibers. The chemical treatment of the pulp, taken alone, is not sufficient to attain the desired modification of the morphology of the fibers, however, subsequent refining or like mechanical treatment of the chemically-treated fibers to achieve a given degree of refinement of the fibers requires dramatically less refining energy to achieve a desired end point of refinement and to impart other desirable properties to the pulp. A pulp of modified SW fibers and a mixture of HW fibers and modified HW fibers are disclosed.

US Patent:

8262850, Sep 11, 2012

Filed:

Sep 23, 2003

Appl. No.:

10/668387

Inventors:

Zheng Tan - Mason OH, US
Xuan Nguyen - Cincinnati OH, US
Karen L. Maurer - Liberty Township OH, US

Assignee:

International Paper Company - Memphis TN

International Classification:

D21C 9/16

US Classification:

162 9, 162 24, 162 26, 162 78, 162 79, 162 82, 162 85, 241 21

Abstract:

A method for alteration of the morphology of cellulose fibers, particularly softwood fibers, by (a) subjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about 1 and about 9, preferably between 3 and 7, and (b) subjecting the treated fibers to a refining treatment thereby converts SW fibers to HW-like fibers in many respects. The metal ion-activated peroxide treatment has been noted to act on pulp cellulose and hemi-cellulose, causing oxidation and oxidative degradation of cellulose fibers. The chemical treatment of the pulp, taken alone, is not sufficient to attain the desired modification of the morphology of the fibers, however, subsequent refining or like mechanical treatment of the chemically-treated fibers to achieve a given degree of refinement of the fibers requires dramatically less refining energy to achieve a desired end point of refinement and to impart other desirable properties to the pulp. A pulp of modified SW fibers and a mixture of HW fibers and modified HW fibers are disclosed.

US Patent:

20160024713, Jan 28, 2016

Filed:

Oct 5, 2015

Appl. No.:

14/874797

Inventors:

- Memphis TN, US
XUAN T. NGUYEN - Cincinnati OH, US
KAREN MAURER - Liberty Twp. OH, US

International Classification:

D21C 9/00
D21C 3/02

Abstract:

A method for alteration of the morphology of cellulose fibers, particularly softwood fibers, by (a) subjecting the fibers to a metal ion-activated peroxide treatment carried out at a pH of between about 1 and about 9, preferably between 3 and 7, and (b) subjecting Use treated fibers to a refining treatment thereby converts SW fibers to HW-like fibers in many respects. The metal ion-activated peroxide treatment has been noted to act on pulp cellulose and hemi-cellulose, causing oxidation and oxidative degradation of cellulose fibers. The chemical treatment of the pulp, taken alone, is not sufficient to attain the desired modification of the morphology of the fibers however, subsequent refining or like mechanical treatment of the chemically-treated fibers to achieve a given degree of refinement of the fibers requires dramatically less refining energy to achieve a desired end point of refinement and to impart other desirable properties to the pulp. A pulp of modified SW fibers and a mixture of HW fibers and modified HW fibers are disclosed.