Pretreatment of the pulp

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CPC
D21C9/1005

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DTEXTILES PAPER D21Papermaking D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS APPARATUS THEREFOR D21C9/00After-treatment of cellulose pulp

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D21C9/1005Pretreatment of the pulp

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Method for producing bleached wood fibre material
- Patent number 11,725,338
- Issue date Aug 15, 2023
- BASF SE
- Stefan Erren
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
High consistency re-pulping method, apparatus and absorbent product...
- Patent number 11,486,089
- Issue date Nov 1, 2022
- GPCP IP Holdings LLC
- Jeffrey A. Lee
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for bleaching paper pulp
- Patent number 11,384,480
- Issue date Jul 12, 2022
- CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS, CARTONS ET CELLULOSES
- Gerard Mortha
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for producing bleached wood fibre material
- Patent number 11,015,290
- Issue date May 25, 2021
- BASF SE
- Stefan Erren
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
High consistency re-pulping method, apparatus and absorbent product...
- Patent number 10,895,038
- Issue date Jan 19, 2021
- GPCP IP Holdings LLC
- Jeffrey A. Lee
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Measurement apparatus and method
- Patent number 10,400,392
- Issue date Sep 3, 2019
- VALMET AUTOMATION OY
- Arvo Rahikkala
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
High speed injector with two stage turbulence flap
- Patent number 10,328,399
- Issue date Jun 25, 2019
- KEMPULP AB
- Anders Lindström
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method and composition for enzymatic treatment of fiber for paperma...
- Patent number 8,784,613
- Issue date Jul 22, 2014
- Buckman Laboratories International, Inc.
- Stephen D. Bryant
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method and composition for enzymatic treatment of fiber for paperma...
- Patent number 8,652,301
- Issue date Feb 18, 2014
- Buckman Laboratories International, Inc.
- Stephen D. Bryant
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for impregnating, refining, and bleaching wood chips having...
- Patent number 7,384,502
- Issue date Jun 10, 2008
- Nippon Paper Industries Co., Ltd.
- Yasuyuki Kamijo
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method of treating cellulosic pulp to remove hexenuronic acid
- Patent number 6,776,876
- Issue date Aug 17, 2004
- Andritz Oy
- Tapani J. Vuorinen
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Black liquor removed from pulp
- Patent number 6,773,546
- Issue date Aug 10, 2004
- Gene E. Lightner
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method of pretreating pulp in an acid tower prior to bleaching with...
- Patent number 6,736,934
- Issue date May 18, 2004
- Andritz Oy
- Kaj Henricson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for acid bleaching of lignocellulose-containing pulp with a...
- Patent number 6,398,908
- Issue date Jun 4, 2002
- Eka Nobel AB
- Wenche Elisabeth Hermansson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for bleaching pulp with adsorption of metals
- Patent number 6,315,862
- Issue date Nov 13, 2001
- Kvaerner Pulping Technologies
- Anders Bergovist
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Acid treatment of pulp at high temperature prior to chlorine dioxid...
- Patent number 6,306,253
- Issue date Oct 23, 2001
- Andritz-Ahlstrom Oy
- Kaj O. Henricson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for producing a pulp suitable for papermaking from nonwood...
- Patent number 6,302,997
- Issue date Oct 16, 2001
- North Carolina State University
- Robert W. Hurter
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for peroxide bleaching of chemical pulp in a pressurized bl...
- Patent number 6,149,766
- Issue date Nov 21, 2000
- Kvaerner Pulping Technologies, A/B
- Petter Tibbling
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for treating pulp in an indirect heat exchanger in connectio...
- Patent number 6,136,145
- Issue date Oct 24, 2000
- Andritz-Ahlstrom Oy
- Kaj O. Henricson
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Method for bleaching paper pulp
- Patent number 6,123,809
- Issue date Sep 26, 2000
- Solvay Interox (Societe Anony.)
- Johan Devenyns
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method of separating metal ions from pulp using a chelating agent
- Patent number 5,980,689
- Issue date Nov 9, 1999
- Sunds Defibrator Industries AB
- Ulf Germg.ang.rd
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method of controlling of metals in a bleach plant, using oxidation
- Patent number 5,639,347
- Issue date Jun 17, 1997
- Ahlstrom Machinery Inc.
- Hans G. Lindberg
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for the use of enzymes in bleaching paper pulp
- Patent number 5,591,304
- Issue date Jan 7, 1997
- Von Kreisler Selting Werner
- Jeffrey Tolan
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Wood pulp reactor
- Patent number 5,591,308
- Issue date Jan 7, 1997
- The BOC Group, Inc.
- Mark J. Kirschner
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for delignifying raw cellulosic material impregnated with m...
- Patent number 5,587,049
- Issue date Dec 24, 1996
- Ausimont S.p.A.
- Fausto Marzolini
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for peroxide bleaching of chemical pulp in a pressurized bl...
- Patent number 5,571,377
- Issue date Nov 5, 1996
- Kvaerner Pulping Technologies AB
- Petter Tibbling
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Flotation process for mechanical pulp using a surface active agent
- Patent number 5,554,258
- Issue date Sep 10, 1996
- Degussa Aktiengesellschaft
- Hans U. Suess
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for high consistency delignification using a low consistenc...
- Patent number 5,525,195
- Issue date Jun 11, 1996
- Union Camp Patent Holding, Inc.
- William H. Friend
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Treatment of bleach plant effluents
- Patent number 5,509,999
- Issue date Apr 23, 1996
- Kamyr, Inc.
- Hans G. Lindberg
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for bleaching pulp with adsorption of metals
- Patent number 5,462,641
- Issue date Oct 31, 1995
- Kamyr Atkiebolag
- Anders Bergvist
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Patents Applicationslast 30 patents

Information Patent Application
HIGH YIELD CHEMICAL PULPING AND BLEACHING PROCESS
- Publication number 20230265609
- Publication date Aug 24, 2023
- GPCP IP Holdings LLC
- Jeffrey A. Lee
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
PREPARATION OF CELLULOSE FIBERS
- Publication number 20220081833
- Publication date Mar 17, 2022
- JENA TRADING APS
- Per VINTHER
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
ARRANGEMENT AND METHOD FOR DEGASSING A PUMP
- Publication number 20220025578
- Publication date Jan 27, 2022
- ANDRITZ OY
- Ronny GEIGER
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
METHOD FOR PRODUCING BLEACHED WOOD FIBRE MATERIAL
- Publication number 20210254280
- Publication date Aug 19, 2021
- BASF SE
- Stefan ERREN
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
METHOD FOR TREATING DISSOLVING PULP
- Publication number 20210207321
- Publication date Jul 8, 2021
- NOVOZYMES A/S
- Pedro Emanuel Garcia Loureiro
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Method For Preparing Dissolving Pulp By Totally Chlorine-Free Bleac...
- Publication number 20210062419
- Publication date Mar 4, 2021
- QILU UNIVERSITY OF TECHNOLOGY
- Zhongjian TIAN
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
High Consistency Re-Pulping Method, Apparatus and Absorbent Product...
- Publication number 20210017704
- Publication date Jan 21, 2021
- GPCP IP Holdings LLC
- Jeffrey A. Lee
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Method And System For Dewatering And Controlling Foam In Pulp And P...
- Publication number 20200240078
- Publication date Jul 30, 2020
- Buckman Laboratories International, Inc.
- Philip M. Hoekstra
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
METHOD FOR PRODUCING ACETATE GRADE DISSOLVING PULP FROM POPLAR RESI...
- Publication number 20200173103
- Publication date Jun 4, 2020
- QILU UNIVERSITY OF TECHNOLOGY
- Chaojun WU
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
METHOD FOR BLEACHING PAPER PULP
- Publication number 20190345672
- Publication date Nov 14, 2019
- CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS, CARTONS ET CELLULOSES
- Gerard MORTHA
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
WATER-SOLUBLE REGENERATED FIBER PRODUCTION FROM CALLUNA VULGARIS PL...
- Publication number 20190024307
- Publication date Jan 24, 2019
- VERITAS TEKSTIL KONFEKSIYON PAZARLAMA SANAYI VE TICARET ANONIM SIRKETI
- Mustafa SOYLU
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
High Consistency Re-Pulping Method, Apparatus and Absorbent Product...
- Publication number 20180347111
- Publication date Dec 6, 2018
- GPCP IP Holdings LLC
- Jeffrey A. Lee
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
METHOD FOR PRODUCING BLEACHED WOOD FIBRE MATERIAL
- Publication number 20180216292
- Publication date Aug 2, 2018
- BASF SE
- Stefan ERREN
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
HIGH SPEED INJECTOR WITH TWO STAGE TURBULENCE FLAP
- Publication number 20180117541
- Publication date May 3, 2018
- GL&V Luxembourg S.à.r.l.
- Anders LINDSTRÖM
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
MEASUREMENT APPARATUS AND METHOD
- Publication number 20170096774
- Publication date Apr 6, 2017
- VALMET AUTOMATION OY
- Arvo RAHIKKALA
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Method And Composition For Enzymatic Treatment Of Fiber For Paperma...
- Publication number 20140069599
- Publication date Mar 13, 2014
- Buckman Laboratories International, Inc.
- Stephen D. Bryant
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Method And Composition For Enzymatic Treatment Of Fiber For Paperma...
- Publication number 20130105100
- Publication date May 2, 2013
- Buckman Laboratories International, Inc.
- Stephen D. Bryant
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Process for the bleaching of mechanical paper pulp
- Publication number 20100163193
- Publication date Jul 1, 2010
- Solvay (Societe Anonyme)
- Rodney Seccombe
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Pulp Bleaching Processes
- Publication number 20070246176
- Publication date Oct 25, 2007
- Shoichi Miyawaki
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Methods of treating chemical cellulose pulp
- Publication number 20060201642
- Publication date Sep 14, 2006
- ANDRITZ INC.
- Nam Hee Shin
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Method for bleaching fibrous materials
- Publication number 20060130984
- Publication date Jun 22, 2006
- Frank-Martin Neumann
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Extended retention and medium consistency pulp treatment
- Publication number 20050051288
- Publication date Mar 10, 2005
- Caifang Yin
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Processes for preparing mechanical pulps having high brightness
- Publication number 20040118529
- Publication date Jun 24, 2004
- Yasuyuki Kamijo
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Black liquor removed from pulp
- Publication number 20040050509
- Publication date Mar 18, 2004
- Gene E. Lighter
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Acid treatment of pulp at high temperature in connection with bleac...
- Publication number 20010020521
- Publication date Sep 13, 2001
- ANDRITZ-AHLSTROM INC.
- Kaj O. Henricson
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
ACID TREATMENT OF PULP AT HIGH TEMPERATURE PRIOR RO CHRLORINE DIOXI...
- Publication number 20010004005
- Publication date Jun 21, 2001
- KAJ O. HENRICSON
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Pretreatment of the pulp

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Method for producing bleached wood fibre material

High consistency re-pulping method, apparatus and absorbent product...

Method for bleaching paper pulp

Method for producing bleached wood fibre material

High consistency re-pulping method, apparatus and absorbent product...

Measurement apparatus and method

High speed injector with two stage turbulence flap

Method and composition for enzymatic treatment of fiber for paperma...

Method and composition for enzymatic treatment of fiber for paperma...

Process for impregnating, refining, and bleaching wood chips having...

Method of treating cellulosic pulp to remove hexenuronic acid

Black liquor removed from pulp

Method of pretreating pulp in an acid tower prior to bleaching with...

Process for acid bleaching of lignocellulose-containing pulp with a...

Process for bleaching pulp with adsorption of metals

Acid treatment of pulp at high temperature prior to chlorine dioxid...

Process for producing a pulp suitable for papermaking from nonwood...

Process for peroxide bleaching of chemical pulp in a pressurized bl...

Method for treating pulp in an indirect heat exchanger in connectio...

Method for bleaching paper pulp

Method of separating metal ions from pulp using a chelating agent

Method of controlling of metals in a bleach plant, using oxidation

Method for the use of enzymes in bleaching paper pulp

Wood pulp reactor

Process for delignifying raw cellulosic material impregnated with m...

Process for peroxide bleaching of chemical pulp in a pressurized bl...

Flotation process for mechanical pulp using a surface active agent

Process for high consistency delignification using a low consistenc...

Treatment of bleach plant effluents

Process for bleaching pulp with adsorption of metals

Patents Applicationslast 30 patents

HIGH YIELD CHEMICAL PULPING AND BLEACHING PROCESS

PREPARATION OF CELLULOSE FIBERS

ARRANGEMENT AND METHOD FOR DEGASSING A PUMP

METHOD FOR PRODUCING BLEACHED WOOD FIBRE MATERIAL

METHOD FOR TREATING DISSOLVING PULP

Method For Preparing Dissolving Pulp By Totally Chlorine-Free Bleac...

High Consistency Re-Pulping Method, Apparatus and Absorbent Product...

Method And System For Dewatering And Controlling Foam In Pulp And P...

METHOD FOR PRODUCING ACETATE GRADE DISSOLVING PULP FROM POPLAR RESI...

METHOD FOR BLEACHING PAPER PULP

WATER-SOLUBLE REGENERATED FIBER PRODUCTION FROM CALLUNA VULGARIS PL...

High Consistency Re-Pulping Method, Apparatus and Absorbent Product...

METHOD FOR PRODUCING BLEACHED WOOD FIBRE MATERIAL

HIGH SPEED INJECTOR WITH TWO STAGE TURBULENCE FLAP

MEASUREMENT APPARATUS AND METHOD

Method And Composition For Enzymatic Treatment Of Fiber For Paperma...

Method And Composition For Enzymatic Treatment Of Fiber For Paperma...

Process for the bleaching of mechanical paper pulp

Pulp Bleaching Processes

Methods of treating chemical cellulose pulp

Method for bleaching fibrous materials

Extended retention and medium consistency pulp treatment

Processes for preparing mechanical pulps having high brightness

Black liquor removed from pulp

Acid treatment of pulp at high temperature in connection with bleac...

ACID TREATMENT OF PULP AT HIGH TEMPERATURE PRIOR RO CHRLORINE DIOXI...