EP3129546A4 - A method of digesting cellulose fibrous material in a continuous digester - Google Patents

A method of digesting cellulose fibrous material in a continuous digester Download PDF

Info

Publication number: EP3129546A4
Authority: EP; European Patent Office
Prior art keywords: fibrous material; continuous digester; cellulose fibrous; digesting cellulose; digesting
Prior art date: 2014-04-07
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

EP15776194.1A

Other languages

German (de)

French (fr)

Other versions

EP3129546A1 (en

Inventor

Mats NÄSMAN

Joni LAPATTO

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Stora Enso Oyj

Original Assignee

Stora Enso Oyj

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2014-04-07

Filing date

2015-04-02

Publication date

2017-11-15

2015-04-02 Application filed by Stora Enso Oyj filed Critical Stora Enso Oyj

2017-02-15 Publication of EP3129546A1 publication Critical patent/EP3129546A1/en

2017-11-15 Publication of EP3129546A4 publication Critical patent/EP3129546A4/en

Status Withdrawn legal-status Critical Current

Links

Classifications

- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/24—Continuous processes
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D21C7/14—Means for circulating the lye
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)

EP15776194.1A 2014-04-07 2015-04-02 A method of digesting cellulose fibrous material in a continuous digester Withdrawn EP3129546A4 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US201461976053P	2014-04-07	2014-04-07
PCT/IB2015/052419 WO2015155642A1 (en)	2014-04-07	2015-04-02	A method of digesting cellulose fibrous material in a continuous digester

Publications (2)

Publication Number	Publication Date
EP3129546A1 EP3129546A1 (en)	2017-02-15
EP3129546A4 true EP3129546A4 (en)	2017-11-15

Family

ID=54287367

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP15776194.1A Withdrawn EP3129546A4 (en)	2014-04-07	2015-04-02	A method of digesting cellulose fibrous material in a continuous digester

Country Status (5)

Country	Link
US (1)	US20170022664A1 (en)
EP (1)	EP3129546A4 (en)
CN (1)	CN106164370B (en)
BR (1)	BR112016023526A2 (en)
WO (1)	WO2015155642A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3007839A (en) *	1958-07-09	1961-11-07	Kamyr Ab	Method and plant for continuous cellulose digestion
WO1999045191A1 (en) *	1998-03-03	1999-09-10	Ahlstrom Machinery Inc.	Treatment of cellulose material with additives while producing cellulose pulp
WO2005116327A1 (en) *	2004-05-28	2005-12-08	Metso Paper, Inc.	Central screen
US20080295981A1 (en) *	2007-05-23	2008-12-04	Andritz Inc.	Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method
US20080302492A1 (en) *	2007-05-23	2008-12-11	Andritz Inc.	Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NO115278B (en) *	1962-03-03	1968-09-09	Kamyr Ab
SE356775B (en) *	1970-02-11	1973-06-04	Karlstad Mekaniska Ab
SE500455C2 (en) *	1992-11-18	1994-06-27	Kamyr Ab	Method of continuous cooking under elevated pressure and temperature of fiber material in a vertical digester
US6123808A (en) *	1997-12-09	2000-09-26	Ahlstrom Machinery Inc.	Distribution of dilution liquor to the discharge of a cellulose pulp digester
SE531067C2 (en) *	2005-09-15	2008-12-09	Metso Fiber Karlstad Ab	Continuous boiler with liquid circulation
SE533610C2 (en) *	2009-03-26	2010-11-02	Metso Fiber Karlstad Ab	Method and apparatus for washing after finished boiling in a continuous boiler for producing cellulose pulp
EP2504486B1 (en) *	2009-11-24	2015-02-25	Andritz, Inc.	Method and system for thin chip digester cooking
WO2012102650A1 (en) *	2011-01-25	2012-08-02	Metso Paper Sweden Ab	Continuous digester with a bottom scraper equipped with draining apertures
US9371612B2 (en) *	2011-02-22	2016-06-21	Andritz Inc.	Method and apparatus to produce pulp using pre-hydrolysis and Kraft cooking

2015
- 2015-04-02 CN CN201580018554.7A patent/CN106164370B/en active Active
- 2015-04-02 US US15/302,212 patent/US20170022664A1/en not_active Abandoned
- 2015-04-02 WO PCT/IB2015/052419 patent/WO2015155642A1/en active Application Filing
- 2015-04-02 EP EP15776194.1A patent/EP3129546A4/en not_active Withdrawn
- 2015-04-02 BR BR112016023526A patent/BR112016023526A2/en not_active Application Discontinuation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3007839A (en) *	1958-07-09	1961-11-07	Kamyr Ab	Method and plant for continuous cellulose digestion
WO1999045191A1 (en) *	1998-03-03	1999-09-10	Ahlstrom Machinery Inc.	Treatment of cellulose material with additives while producing cellulose pulp
WO2005116327A1 (en) *	2004-05-28	2005-12-08	Metso Paper, Inc.	Central screen
US20080295981A1 (en) *	2007-05-23	2008-12-04	Andritz Inc.	Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method
US20080302492A1 (en) *	2007-05-23	2008-12-11	Andritz Inc.	Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2015155642A1 *

Also Published As

Publication number	Publication date
US20170022664A1 (en)	2017-01-26
WO2015155642A1 (en)	2015-10-15
CN106164370B (en)	2019-01-18
BR112016023526A2 (en)	2017-08-15
EP3129546A1 (en)	2017-02-15
CN106164370A (en)	2016-11-23

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Legal Events

Date	Code	Title	Description
2017-01-13	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
2017-02-15	17P	Request for examination filed	Effective date: 20161107
2017-02-15	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
2017-02-15	AX	Request for extension of the european patent	Extension state: BA ME
2017-07-12	DAV	Request for validation of the european patent (deleted)
2017-07-12	DAX	Request for extension of the european patent (deleted)
2017-11-15	A4	Supplementary search report drawn up and despatched	Effective date: 20171016
2017-11-15	RIC1	Information provided on ipc code assigned before grant	Ipc: D21C 3/24 20060101AFI20171010BHEP Ipc: D21C 9/02 20060101ALI20171010BHEP Ipc: D21C 7/00 20060101ALI20171010BHEP Ipc: D21C 7/14 20060101ALI20171010BHEP
2018-10-19	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN
2018-11-21	18D	Application deemed to be withdrawn	Effective date: 20180517