EP0165867A1 - Verfahren zum Bleichen von mechanischer Pulpe mittels Wasserstoffperoxid - Google Patents

Verfahren zum Bleichen von mechanischer Pulpe mittels Wasserstoffperoxid Download PDF

Info

Publication number: EP0165867A1
Authority: EP; European Patent Office
Prior art keywords: oxygen; hydrogen peroxide; bleaching; mechanical pulp; treatment
Prior art date: 1984-06-15
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.): Granted

Application number

EP85401182A

Other languages

English (en)

French (fr)

Other versions

EP0165867B1 (de

Inventor

Dominique Lachenal

Claude Bourne

Christian De Choudens

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.)

Air Liquide SA

LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

Original Assignee

Air Liquide SA

LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

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.)

1984-06-15

Filing date

1985-06-14

Publication date

1985-12-27

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9305255&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0165867(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1985-06-14 Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA

1985-06-14 Priority to AT85401182T priority Critical patent/ATE31333T1/de

1985-12-27 Publication of EP0165867A1 publication Critical patent/EP0165867A1/de

1987-12-09 Application granted granted Critical

1987-12-09 Publication of EP0165867B1 publication Critical patent/EP0165867B1/de

Status Expired legal-status Critical Current

Links

MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 title claims abstract description 76
229920001131 Pulp (paper) Polymers 0.000 title claims abstract description 31
238000004061 bleaching Methods 0.000 title claims description 28
238000000034 method Methods 0.000 title claims description 21
230000008569 process Effects 0.000 title claims description 12
239000001301 oxygen Substances 0.000 claims abstract description 54
229910052760 oxygen Inorganic materials 0.000 claims abstract description 54
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 53
150000002978 peroxides Chemical class 0.000 claims description 6
239000004115 Sodium Silicate Substances 0.000 claims description 5
229910052911 sodium silicate Inorganic materials 0.000 claims description 5
NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
239000003352 sequestering agent Substances 0.000 claims description 3
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 1
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
239000007844 bleaching agent Substances 0.000 description 5
229920005610 lignin Polymers 0.000 description 5
241000196324 Embryophyta Species 0.000 description 4
241000218657 Picea Species 0.000 description 4
230000009471 action Effects 0.000 description 4
239000003153 chemical reaction reagent Substances 0.000 description 3
GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 3
229910052751 metal Inorganic materials 0.000 description 3
239000002184 metal Substances 0.000 description 3
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
230000015572 biosynthetic process Effects 0.000 description 2
150000001768 cations Chemical class 0.000 description 2
239000003795 chemical substances by application Substances 0.000 description 2
238000010411 cooking Methods 0.000 description 2
238000000354 decomposition reaction Methods 0.000 description 2
235000020094 liqueur Nutrition 0.000 description 2
239000000203 mixture Substances 0.000 description 2
230000003647 oxidation Effects 0.000 description 2
238000007254 oxidation reaction Methods 0.000 description 2
150000002926 oxygen Chemical class 0.000 description 2
238000004076 pulp bleaching Methods 0.000 description 2
230000000630 rising effect Effects 0.000 description 2
229910052708 sodium Inorganic materials 0.000 description 2
239000011734 sodium Substances 0.000 description 2
235000011121 sodium hydroxide Nutrition 0.000 description 2
230000002087 whitening effect Effects 0.000 description 2
238000006677 Appel reaction Methods 0.000 description 1
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
239000002253 acid Substances 0.000 description 1
239000012670 alkaline solution Substances 0.000 description 1
230000001174 ascending effect Effects 0.000 description 1
235000012730 carminic acid Nutrition 0.000 description 1
238000006243 chemical reaction Methods 0.000 description 1
239000008139 complexing agent Substances 0.000 description 1
239000000470 constituent Substances 0.000 description 1
238000004090 dissolution Methods 0.000 description 1
230000000694 effects Effects 0.000 description 1
230000002708 enhancing effect Effects 0.000 description 1
239000007789 gas Substances 0.000 description 1
239000001257 hydrogen Substances 0.000 description 1
229910052739 hydrogen Inorganic materials 0.000 description 1
229920002521 macromolecule Polymers 0.000 description 1
159000000003 magnesium salts Chemical class 0.000 description 1
229910052943 magnesium sulfate Inorganic materials 0.000 description 1
235000019341 magnesium sulphate Nutrition 0.000 description 1
230000007246 mechanism Effects 0.000 description 1
235000015927 pasta Nutrition 0.000 description 1
235000011837 pasties Nutrition 0.000 description 1
125000002081 peroxide group Chemical group 0.000 description 1
150000003254 radicals Chemical class 0.000 description 1
239000000376 reactant Substances 0.000 description 1
238000004064 recycling Methods 0.000 description 1
230000009467 reduction Effects 0.000 description 1
159000000000 sodium salts Chemical class 0.000 description 1
239000003381 stabilizer Substances 0.000 description 1
239000000126 substance Substances 0.000 description 1
238000010408 sweeping Methods 0.000 description 1
230000001052 transient effect Effects 0.000 description 1
229910052723 transition metal Inorganic materials 0.000 description 1
150000003624 transition metals Chemical class 0.000 description 1
238000005406 washing Methods 0.000 description 1
239000002023 wood Substances 0.000 description 1
238000004383 yellowing Methods 0.000 description 1
239000011701 zinc Substances 0.000 description 1
229910052725 zinc Inorganic materials 0.000 description 1

Images

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
- 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
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
- 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
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Definitions

the invention relates to a process for bleaching mechanical pulp with hydrogen peroxide.
the bleaching of a mechanical paper pulp consists in eliminating the colored groups from the pulp by oxidation or by reduction of these groups, without dissolving the constituents of the wood in the bleaching liquor. This operation is carried out industrially with hydrogen peroxide H 2 O 2 (P) or hydrosulfite of sodium or zinc.
the use of hydrogen peroxide (P) makes it possible to reach whiteness levels greater than those obtained with hydrosulfite. It has therefore become widespread, where the objective is to prepare whiteness 80 pasta (ISO standard).
the bleaching is carried out either in a single stage with hydrogen peroxide, or in two stages, the first stage being a treatment with hydrogen peroxide and the second a treatment with hydrosulfite.
the medium is made alkaline by the addition of caustic soda.
the hydrogen peroxide rapidly decomposes into oxygen with transient formation of radical species ineffective in the bleaching process. This decomposition is catalyzed by the cations of transition metals present in the pulp.
bleaching chemical pulps consists in dissolving the residual lignin (delignification), in order to obtain cellulosic pulps free of lignin. It is therefore no longer a question of carrying out a moderate treatment on the colored groups of the paste, but of depolymerizing and dissolving the macromolecules carrying these colored groups.
oxygen is not a bleaching agent for mechanical pulps.
DH ANDREWS and RP SINGH indicate in the work entitled “The bleaching of pulp", editor TAPPI Press (1979), page 215, that oxygen in an alkaline medium causes yellowing of the mechanical pulp, which is consistent with what is known about the chemistry of lignin in the presence of oxygen.
oxygen is capable of enhancing the whitening action of hydrogen peroxide in the bleaching of mechanical pulps, whether the two reagents are used in sequence or simultaneously.
the process for bleaching mechanical pulp with hydrogen peroxide according to the invention is characterized in that, before or simultaneously to said peroxide treatment, the mechanical pulp is subjected to an oxygen pressure.
oxygen pressure is meant both the use of oxygen at atmospheric pressure and under pressure, the latter possibly reaching a few bars.
the action of oxygen can therefore be exerted, either from atmospheric oxygen which then acts on the dough, in particular by sweeping or licking, or from oxygen under pressure, for example that exerted under the effect of the height of a column of dough in an ascending bleaching tower.
oxygen can be used as a bleaching agent since, as we saw in the preamble, oxygen used alone in an alkaline medium has no bleaching action on a mechanical pulp.
the mechanical pulp is bleached with hydrogen peroxide under the usual industrial conditions, that is to say in an alkaline medium in the presence of stabilizing agents which can be sodium silicate, magnesium sulfate, the complexing agents usually used, such as the sodium salts of diethylenetriaminopentacetic acid, at a temperature below 100 ° C. under an oxygen atmosphere.
stabilizing agents which can be sodium silicate, magnesium sulfate, the complexing agents usually used, such as the sodium salts of diethylenetriaminopentacetic acid, at a temperature below 100 ° C. under an oxygen atmosphere.
the mechanical pulp containing the bleaching agents can be mixed with gaseous oxygen in a suitable mixer before being sent to the bleaching tower, preferably upward.
the pulp containing bleaching products is sent to a tower containing oxygen or to any other type of reactor containing oxygen and where the bleaching of the pulp will take place or will continue. It is therefore a process which will be called P / 0 (sequence: hydrogen peroxide / oxygen) according to the usual internationally accepted codification.
the mechanical pulp made alkaline by addition of sodium hydroxide or silicate is mixed with oxygen, then left under oxygen pressure at a temperature below 100 ° C for the necessary time, which should not exceed four hours.
This operation is carried out in a suitable reactor which can be a tower.
the actual bleaching reagents are then added, in particular hydrogen peroxide.
the dough is placed under the usual bleaching conditions with hydrogen peroxide. This process will therefore be referenced 0 P according to the accepted codification.
the paste and the alkaline liquor are introduced into an enclosure at the processing temperature. After this treatment, the dough is washed. Its whiteness is 72.2%. The consumption of hydrogen peroxide is 1.75%.
This test 1 corresponds to the sequence P.
test No. 2 the same unbleached mechanical pulp is treated with oxygen under the following conditions:
This test No. 2 therefore corresponds to the OP sequence.
test 6 The same test is then repeated, this time subjecting the paste to an oxygen pressure of 2 bars throughout the treatment with hydrogen peroxide (test 6). After this P / O treatment, the whiteness obtained is 75.2%, a gain of 1.2 points compared to test no. 5 which does not include oxygen.
the reference (1) designates the dough which is sent to the mixer (2) where it simultaneously receives oxygen (3) and hydrogen peroxide (4) brought into the mixer (2) by the valve three ways (5).
the pasty mixture produced is sent through line (6) to arrive at the rising tower (7) where this mixture of paste and reagents remains for the time necessary for the reaction.
the bleached pulp is recovered in (8).
the height of the dough column in the tower (7) ensures sufficient oxygen pressure.
the method according to the invention can be used successfully for bleaching mechanical pulps.

Landscapes

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

EP85401182A 1984-06-15 1985-06-14 Verfahren zum Bleichen von mechanischer Pulpe mittels Wasserstoffperoxid Expired EP0165867B1 (de)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT85401182T ATE31333T1 (de)	1984-06-15	1985-06-14	Verfahren zum bleichen von mechanischer pulpe mittels wasserstoffperoxid.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR8409718A FR2566015B1 (fr)	1984-06-15	1984-06-15	Procede de blanchiment de pate mecanique par le peroxyde d'hydrogene
FR8409718		1984-06-15

Publications (2)

Publication Number	Publication Date
EP0165867A1 true EP0165867A1 (de)	1985-12-27
EP0165867B1 EP0165867B1 (de)	1987-12-09

Family

ID=9305255

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP85401182A Expired EP0165867B1 (de)	1984-06-15	1985-06-14	Verfahren zum Bleichen von mechanischer Pulpe mittels Wasserstoffperoxid

Country Status (7)

Country	Link
US (1)	US4756798A (de)
EP (1)	EP0165867B1 (de)
JP (1)	JP2504400B2 (de)
AT (1)	ATE31333T1 (de)
CA (1)	CA1259454A (de)
DE (1)	DE3561165D1 (de)
FR (1)	FR2566015B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0401149A1 (de) *	1989-05-19	1990-12-05	Fmc Corporation	Mit Wasserstoffperoxid verstärkte Sauerstoffdelignifizierung
EP0557651A1 (de) *	1992-02-24	1993-09-01	Scott Paper Company	Integriertes Altpapieraufschlussverfahren zur Herstellung von Fasern für Seidenpapier
US5698075A (en) *	1991-03-11	1997-12-16	Solvay Interox (Societe Anonyme)	Process for bleaching a chemical paper pulp in an oxygen-peroxymonosulfuric acid-hydrogen peroxide sequence
EP0816558A1 (de) *	1996-06-29	1998-01-07	Voith Sulzer Stoffaufbereitung GmbH	Verfahren zur Erhöhung des Weissgrades von Papierfaserstoff
CN108642943A (zh) *	2018-04-03	2018-10-12	中国林业科学研究院林产化学工业研究所	一种制备高白度高强度桉木化学机械浆的方法

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
ES2004389A6 (es) *	1986-03-21	1989-01-01	Air Prod & Chem	Un metodo mejorado de deslignificacion y blanqueo secuenciales de pasta de papel lignocelulosica
US5607546A (en) *	1990-02-13	1997-03-04	Molnlycke Ab	CTMP-process
SE466060C (sv)	1990-02-13	1995-09-11	Moelnlycke Ab	Absorberande kemitermomekanisk massa och framställning därav
AU642971B2 (en) *	1990-02-19	1993-11-04	Paper Australia Pty Ltd	Bleaching of paper pulp
NZ237019A (en) *	1990-02-19	1992-11-25	Amcor Ltd	Bleaching paper pulp by initially treating with oxygen and/or hydrogen peroxide and subsequently treating with a bleaching agent without intervening washing steps
SE9301960L (sv) *	1993-06-08	1994-07-25	Kvaerner Pulping Tech	Blekning av kemisk massa med peroxid vid övertryck
US6149766A (en) *	1993-06-08	2000-11-21	Kvaerner Pulping Technologies, A/B	Process for peroxide bleaching of chemical pulp in a pressurized bleaching vessel
CA2157154A1 (en) *	1994-08-29	1996-03-01	Gordon Leary	Bleaching of high-yield pulps with oxygen
CN1203643A (zh) *	1995-12-07	1998-12-30	贝洛特工艺技术公司	中等稠度纸浆的氧化去木质作用
GB0004988D0 (en)	2000-03-01	2000-04-19	Unilever Plc	Composition and method for bleaching a substrate
US6627041B2 (en) *	2000-03-06	2003-09-30	Georgia-Pacific Corporation	Method of bleaching and providing papermaking fibers with durable curl
US6899790B2 (en)	2000-03-06	2005-05-31	Georgia-Pacific Corporation	Method of providing papermaking fibers with durable curl
US7297225B2 (en) *	2004-06-22	2007-11-20	Georgia-Pacific Consumer Products Lp	Process for high temperature peroxide bleaching of pulp with cool discharge
US8138106B2 (en)	2005-09-30	2012-03-20	Rayonier Trs Holdings Inc.	Cellulosic fibers with odor control characteristics
US20080087390A1 (en) *	2006-10-11	2008-04-17	Fort James Corporation	Multi-step pulp bleaching
US8845860B2 (en)	2010-09-16	2014-09-30	Georgia-Pacific Consumer Products Lp	High brightness pulps from lignin rich waste papers
TW201610261A (zh)	2014-05-20	2016-03-16	喬治亞太平洋消費者產品公司	非木材纖維之漂白及植物性雜質減量方法
TW201610265A (zh)	2014-05-20	2016-03-16	喬治亞太平洋消費者產品公司	非木材纖維之漂白及植物性雜質減量方法
TW201544652A (zh) *	2014-05-20	2015-12-01	Georgia Pacific Consumer Prod	非木材纖維之漂白及植物性雜質減量方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2040763A1 (de) *	1970-05-11	1971-11-18	Kymin Oy Kymmene Ab	Verfahren zum Bleichen zellulosehaltiger Stoffe
FR2301630A1 (fr) *	1975-02-24	1976-09-17	Alf Sa	Procede de production de pate mecanique pour la fabrication du papier
EP0019963A1 (de) *	1979-05-25	1980-12-10	INTEROX Société Anonyme	Verfahren zur Delignifizierung und zum Bleichen von chemischen und halbchemischen Zellstoffen
US4372812A (en) *	1978-04-07	1983-02-08	International Paper Company	Chlorine free process for bleaching lignocellulosic pulp

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CA632280A (en) *	1958-07-02	1961-12-05	Kimberly-Clark Corporation	Manufacture of bleached cellulosic products resistant to brightness reversion
US3719552A (en) *	1971-06-18	1973-03-06	American Cyanamid Co	Bleaching of lignocellulosic materials with oxygen in the presence of a peroxide
US4029543A (en) *	1971-12-14	1977-06-14	Mo Och Domsjo	Mechanically freeing wood fibers in the presence of spent peroxide bleaching liquor
US3832276A (en) *	1973-03-07	1974-08-27	Int Paper Co	Delignification and bleaching of a cellulose pulp slurry with oxygen
US4410397A (en) *	1978-04-07	1983-10-18	International Paper Company	Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
US4239643A (en) *	1979-01-02	1980-12-16	Monsanto Company	Peroxide stabilization
JPS59137591A (ja) *	1983-01-28	1984-08-07	王子製紙株式会社	リグノセルロ−ス物質の漂白方法
JPS59179892A (ja) *	1983-03-25	1984-10-12	王子製紙株式会社	リグノセルロ−ス物質の漂白方法
DE3428352A1 (de) *	1984-08-01	1986-02-13	Degussa Ag, 6000 Frankfurt	Verfahren zur delignifizierung und bleiche von zellstoffen
US4568420B1 (en) *	1984-12-03	1999-03-02	Int Paper Co	Multi-stage bleaching process including an enhanced oxidative extraction stage

1984
- 1984-06-15 FR FR8409718A patent/FR2566015B1/fr not_active Expired
1985
- 1985-06-14 JP JP60128426A patent/JP2504400B2/ja not_active Expired - Lifetime
- 1985-06-14 CA CA000484053A patent/CA1259454A/fr not_active Expired
- 1985-06-14 DE DE8585401182T patent/DE3561165D1/de not_active Expired
- 1985-06-14 AT AT85401182T patent/ATE31333T1/de not_active IP Right Cessation
- 1985-06-14 EP EP85401182A patent/EP0165867B1/de not_active Expired
1987
- 1987-04-16 US US07/039,794 patent/US4756798A/en not_active Expired - Lifetime

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2040763A1 (de) *	1970-05-11	1971-11-18	Kymin Oy Kymmene Ab	Verfahren zum Bleichen zellulosehaltiger Stoffe
FR2301630A1 (fr) *	1975-02-24	1976-09-17	Alf Sa	Procede de production de pate mecanique pour la fabrication du papier
US4372812A (en) *	1978-04-07	1983-02-08	International Paper Company	Chlorine free process for bleaching lignocellulosic pulp
EP0019963A1 (de) *	1979-05-25	1980-12-10	INTEROX Société Anonyme	Verfahren zur Delignifizierung und zum Bleichen von chemischen und halbchemischen Zellstoffen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0401149A1 (de) *	1989-05-19	1990-12-05	Fmc Corporation	Mit Wasserstoffperoxid verstärkte Sauerstoffdelignifizierung
US5698075A (en) *	1991-03-11	1997-12-16	Solvay Interox (Societe Anonyme)	Process for bleaching a chemical paper pulp in an oxygen-peroxymonosulfuric acid-hydrogen peroxide sequence
EP0557651A1 (de) *	1992-02-24	1993-09-01	Scott Paper Company	Integriertes Altpapieraufschlussverfahren zur Herstellung von Fasern für Seidenpapier
EP0816558A1 (de) *	1996-06-29	1998-01-07	Voith Sulzer Stoffaufbereitung GmbH	Verfahren zur Erhöhung des Weissgrades von Papierfaserstoff
CN108642943A (zh) *	2018-04-03	2018-10-12	中国林业科学研究院林产化学工业研究所	一种制备高白度高强度桉木化学机械浆的方法
CN108642943B (zh) *	2018-04-03	2021-03-19	中国林业科学研究院林产化学工业研究所	一种制备高白度高强度桉木化学机械浆的方法

Also Published As

Publication number	Publication date
JP2504400B2 (ja)	1996-06-05
FR2566015B1 (fr)	1986-08-29
FR2566015A1 (fr)	1985-12-20
CA1259454A (fr)	1989-09-19
JPS6112994A (ja)	1986-01-21
DE3561165D1 (en)	1988-01-21
EP0165867B1 (de)	1987-12-09
US4756798A (en)	1988-07-12
ATE31333T1 (de)	1987-12-15

Legal Events

Date	Code	Title	Description
1985-10-26	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
1985-12-27	17P	Request for examination filed	Effective date: 19850619
1985-12-27	AK	Designated contracting states	Designated state(s): AT BE CH DE FR GB IT LI LU NL SE
1986-12-17	17Q	First examination report despatched	Effective date: 19861029
1987-08-18	ITF	It: translation for a ep patent filed
1987-10-24	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1987-12-09	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE
1987-12-09	REF	Corresponds to:	Ref document number: 31333 Country of ref document: AT Date of ref document: 19871215 Kind code of ref document: T
1988-01-21	REF	Corresponds to:	Ref document number: 3561165 Country of ref document: DE Date of ref document: 19880121
1988-04-07	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
1988-06-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19880630
1988-09-02	PLBI	Opposition filed	Free format text: ORIGINAL CODE: 0009260
1988-09-16	PLBI	Opposition filed	Free format text: ORIGINAL CODE: 0009260
1988-10-19	26	Opposition filed	Opponent name: AGA AKTIEBOLAG Effective date: 19880829
1988-11-02	26	Opposition filed	Opponent name: INTEROX, S.A. Effective date: 19880908 Opponent name: AGA AKTIEBOLAG Effective date: 19880829
1988-12-16	NLR1	Nl: opposition has been filed with the epo	Opponent name: INTEROX, S.A. Opponent name: AGA AKTIEBOLAG
1989-05-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 19890531 Year of fee payment: 5
1990-05-10	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 19900510 Year of fee payment: 6 Ref country code: AT Payment date: 19900510 Year of fee payment: 6
1990-05-15	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 19900515 Year of fee payment: 6
1990-05-16	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: SE Payment date: 19900516 Year of fee payment: 6
1990-05-18	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: BE Payment date: 19900518 Year of fee payment: 6
1990-05-22	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: CH Payment date: 19900522 Year of fee payment: 6
1990-05-23	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: LU Payment date: 19900523 Year of fee payment: 6
1990-06-01	RDAG	Patent revoked	Free format text: ORIGINAL CODE: 0009271
1990-06-01	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: PATENT REVOKED
1990-06-30	ITTA	It: last paid annual fee
1990-06-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: NL Payment date: 19900630 Year of fee payment: 6
1990-07-13	REG	Reference to a national code	Ref country code: CH Ref legal event code: PL
1990-07-18	27W	Patent revoked	Effective date: 19900302
1990-07-18	GBPR	Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state
1990-09-03	NLR2	Nl: decision of opposition
1991-12-31	BERE	Be: lapsed	Owner name: L' AIR LIQUIDE S.A. POUR L'ETUDE ET L'EXPLOITATION Effective date: 19910630
1995-01-31	EUG	Se: european patent has lapsed	Ref document number: 85401182.2 Effective date: 19900718

Publication	Publication Date	Title
EP0165867B1 (de)	1987-12-09	Verfahren zum Bleichen von mechanischer Pulpe mittels Wasserstoffperoxid
EP0578305B1 (de)	1998-03-04	Verfahren zur Delignifizierung von chemischen Zellstoffen
EP0019963B1 (de)	1982-12-15	Verfahren zur Delignifizierung und zum Bleichen von chemischen und halbchemischen Zellstoffen
FR2467261A1 (fr)	1981-04-17	Blanchiment de matiere lignocellulosique au moyen d'agents de blanchiment contenant du peroxyde
EP2761081B1 (de)	2018-08-08	Enzymatische vorbehandlung von holz in einem verfahren zur herstellung von mechanischem papierzellstoff
KR20220141893A (ko)	2022-10-20	개질된 황산 및 그 용도
NO323000B1 (no)	2006-12-18	Flerkomponentsystem for modifikasjon, nedbrytning eller bleking av lignin eller ligninholdige materialer, fremgangsmate for behandling av lignin, og anvendelse av systemet
KR920007940B1 (ko)	1992-09-19	펄프 제조공정 및 그 장치
JPH05505857A (ja)	1993-08-26	セルロースの酵素的漂白方法
BE1004674A3 (fr)	1993-01-12	Procede pour le blanchiment d'une pate a papier chimique et application de ce procede au blanchiment d'une pate kraft.
CA1262805A (fr)	1989-11-14	Procede de blanchiment de pates papetieres par le peroxyde d'hydrogene
EP0285530A1 (de)	1988-10-05	Verfahren zum Bleichen von Zellstoffen
EP0801169B1 (de)	2001-06-20	Verfahren zur Entfernung von Lignin aus Chemie-Papierzellstoffen und zur Bleichung dieser Zellstoffe.
EP0587822B1 (de)	1995-08-30	Verfahren zum bleichen und zur delignifizierung von chemischen papierzellstoffen
CA1282911C (fr)	1991-04-16	Procede pour la delignification de matieres cellulosiques
FR2553444A1 (fr)	1985-04-19	Traitement a l'hypochlorite de pates papetieres chimiques
CA2157291A1 (fr)	1994-09-15	Procede pour la delignification d'une pate a papier chimique
FR2620144A1 (fr)	1989-03-10	Procede de fabrication de pate a papier blanchie comportant un traitement a l'aide d'acide carbonique apres blanchiment
EP0726979B1 (de)	1998-05-13	Verfahren zum bleichen von zellstoff
BE1007272A3 (fr)	1995-05-09	Procede pour le blanchiment d'une pate a papier.
EP0212329A1 (de)	1987-03-04	Verfahren zur Delignifizierung von Zellulosematerialien
BE1005800A3 (fr)	1994-02-01	Procede pour la delignification et le blanchiment d'une pate a papier chimique.
FR2505377A1 (fr)	1982-11-12	Procede pour le blanchiement de cellulose fabriquee chimiquement
BE1011503A3 (fr)	1999-10-05	Fabrication de pate a papier chimique.
BE656601A (de)	1964-12-31