JPH11508001A - 紙パルプを酸素脱リグニンするための方法 - Google Patents

紙パルプを酸素脱リグニンするための方法

Info

Publication number: JPH11508001A
Authority: JP; Japan
Prior art keywords: pulp; peracetic acid; oxygen; delignification; stage
Prior art date: 1996-04-12
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.): Pending

Application number

JP9536800A

Other languages

English (en)

Japanese (ja)

Inventor

ラルニコル、ピエール

レドン、アンリー

ミュゲ、ミシェル

ラビリエ、ジャン−マルク

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.)

Chemoxal SA

Original Assignee

Chemoxal SA

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.)

1996-04-12

Filing date

1997-04-11

Publication date

1999-07-13

1997-04-11 Application filed by Chemoxal SA filed Critical Chemoxal SA

1999-07-13 Publication of JPH11508001A publication Critical patent/JPH11508001A/ja

Status Pending legal-status Critical Current

Links

QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 85
239000001301 oxygen Substances 0.000 title claims abstract description 85
229910052760 oxygen Inorganic materials 0.000 title claims abstract description 85
238000000034 method Methods 0.000 title claims abstract description 54
229920001131 Pulp (paper) Polymers 0.000 title claims abstract description 15
KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims abstract description 154
150000004967 organic peroxy acids Chemical class 0.000 claims abstract description 14
238000011282 treatment Methods 0.000 claims description 37
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 24
230000008569 process Effects 0.000 claims description 22
238000002347 injection Methods 0.000 claims description 18
239000007924 injection Substances 0.000 claims description 18
229920005610 lignin Polymers 0.000 claims description 15
230000000694 effects Effects 0.000 claims description 12
230000009920 chelation Effects 0.000 claims description 11
229920002678 cellulose Polymers 0.000 claims description 9
239000001913 cellulose Substances 0.000 claims description 9
238000004061 bleaching Methods 0.000 claims description 8
238000010533 azeotropic distillation Methods 0.000 claims description 5
238000004076 pulp bleaching Methods 0.000 claims description 4
OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
159000000003 magnesium salts Chemical class 0.000 claims description 3
229910052698 phosphorus Inorganic materials 0.000 claims description 3
239000011574 phosphorus Substances 0.000 claims description 3
229910052783 alkali metal Inorganic materials 0.000 claims description 2
-1 alkali metal salts Chemical class 0.000 claims description 2
238000004821 distillation Methods 0.000 claims description 2
239000000463 material Substances 0.000 claims description 2
150000007522 mineralic acids Chemical class 0.000 claims description 2
FMMSEFNIWDFLKK-UHFFFAOYSA-N [O].OO Chemical compound [O].OO FMMSEFNIWDFLKK-UHFFFAOYSA-N 0.000 claims 1
239000002351 wastewater Substances 0.000 claims 1
230000004913 activation Effects 0.000 abstract description 3
238000002203 pretreatment Methods 0.000 abstract description 2
238000005406 washing Methods 0.000 description 28
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 14
239000000460 chlorine Substances 0.000 description 13
239000002655 kraft paper Substances 0.000 description 13
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 11
229910052801 chlorine Inorganic materials 0.000 description 11
239000000123 paper Substances 0.000 description 11
239000011122 softwood Substances 0.000 description 11
239000002253 acid Substances 0.000 description 10
FFHWGQQFANVOHV-UHFFFAOYSA-N dimethyldioxirane Chemical compound CC1(C)OO1 FFHWGQQFANVOHV-UHFFFAOYSA-N 0.000 description 10
OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 10
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
150000002500 ions Chemical class 0.000 description 8
238000010411 cooking Methods 0.000 description 7
238000010790 dilution Methods 0.000 description 7
239000012895 dilution Substances 0.000 description 7
238000006243 chemical reaction Methods 0.000 description 6
239000000203 mixture Substances 0.000 description 6
239000000376 reactant Substances 0.000 description 6
239000004155 Chlorine dioxide Substances 0.000 description 5
235000019398 chlorine dioxide Nutrition 0.000 description 5
238000004519 manufacturing process Methods 0.000 description 5
229910052708 sodium Inorganic materials 0.000 description 5
239000011734 sodium Substances 0.000 description 5
MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 4
238000010306 acid treatment Methods 0.000 description 4
JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 4
239000002904 solvent Substances 0.000 description 4
QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 description 3
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
239000007864 aqueous solution Substances 0.000 description 3
230000008901 benefit Effects 0.000 description 3
239000002738 chelating agent Substances 0.000 description 3
230000000977 initiatory effect Effects 0.000 description 3
150000004045 organic chlorine compounds Chemical class 0.000 description 3
FHHJDRFHHWUPDG-UHFFFAOYSA-N peroxysulfuric acid Chemical compound OOS(O)(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-N 0.000 description 3
ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
230000000704 physical effect Effects 0.000 description 3
230000009467 reduction Effects 0.000 description 3
CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
102000004190 Enzymes Human genes 0.000 description 2
108090000790 Enzymes Proteins 0.000 description 2
244000166124 Eucalyptus globulus Species 0.000 description 2
AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 2
NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
230000002378 acidificating effect Effects 0.000 description 2
230000015572 biosynthetic process Effects 0.000 description 2
239000007844 bleaching agent Substances 0.000 description 2
230000008859 change Effects 0.000 description 2
238000005660 chlorination reaction Methods 0.000 description 2
230000002255 enzymatic effect Effects 0.000 description 2
238000000605 extraction Methods 0.000 description 2
230000006872 improvement Effects 0.000 description 2
230000014759 maintenance of location Effects 0.000 description 2
229910021645 metal ion Inorganic materials 0.000 description 2
BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
230000007935 neutral effect Effects 0.000 description 2
150000002978 peroxides Chemical class 0.000 description 2
150000003839 salts Chemical class 0.000 description 2
LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
239000000243 solution Substances 0.000 description 2
229910052723 transition metal Inorganic materials 0.000 description 2
150000003624 transition metals Chemical class 0.000 description 2
GLVYLTSKTCWWJR-UHFFFAOYSA-N 2-carbonoperoxoylbenzoic acid Chemical compound OOC(=O)C1=CC=CC=C1C(O)=O GLVYLTSKTCWWJR-UHFFFAOYSA-N 0.000 description 1
YNJSNEKCXVFDKW-UHFFFAOYSA-N 3-(5-amino-1h-indol-3-yl)-2-azaniumylpropanoate Chemical compound C1=C(N)C=C2C(CC(N)C(O)=O)=CNC2=C1 YNJSNEKCXVFDKW-UHFFFAOYSA-N 0.000 description 1
OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
WBOQHFMXKCEWSQ-UHFFFAOYSA-N 4-hydroperoxy-4-oxobutanoic acid Chemical compound OOC(=O)CCC(O)=O WBOQHFMXKCEWSQ-UHFFFAOYSA-N 0.000 description 1
VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
101710121765 Endo-1,4-beta-xylanase Proteins 0.000 description 1
241000202567 Fatsia japonica Species 0.000 description 1
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 1
GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
235000005018 Pinus echinata Nutrition 0.000 description 1
241001236219 Pinus echinata Species 0.000 description 1
235000017339 Pinus palustris Nutrition 0.000 description 1
239000000011 acetone peroxide Substances 0.000 description 1
235000019401 acetone peroxide Nutrition 0.000 description 1
150000007513 acids Chemical class 0.000 description 1
239000012190 activator Substances 0.000 description 1
230000002730 additional effect Effects 0.000 description 1
239000003513 alkali Substances 0.000 description 1
229910000147 aluminium phosphate Inorganic materials 0.000 description 1
150000003863 ammonium salts Chemical class 0.000 description 1
239000012752 auxiliary agent Substances 0.000 description 1
230000033228 biological regulation Effects 0.000 description 1
230000015556 catabolic process Effects 0.000 description 1
239000003054 catalyst Substances 0.000 description 1
239000003795 chemical substances by application Substances 0.000 description 1
239000012141 concentrate Substances 0.000 description 1
238000005260 corrosion Methods 0.000 description 1
230000007797 corrosion Effects 0.000 description 1
238000006731 degradation reaction Methods 0.000 description 1
230000001627 detrimental effect Effects 0.000 description 1
238000007865 diluting Methods 0.000 description 1
XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
235000011180 diphosphates Nutrition 0.000 description 1
230000008030 elimination Effects 0.000 description 1
238000003379 elimination reaction Methods 0.000 description 1
230000007613 environmental effect Effects 0.000 description 1
238000011067 equilibration Methods 0.000 description 1
235000019253 formic acid Nutrition 0.000 description 1
125000000524 functional group Chemical group 0.000 description 1
239000007789 gas Substances 0.000 description 1
150000008282 halocarbons Chemical class 0.000 description 1
230000000640 hydroxylating effect Effects 0.000 description 1
238000011065 in-situ storage Methods 0.000 description 1
238000010348 incorporation Methods 0.000 description 1
WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 description 1
229910052751 metal Inorganic materials 0.000 description 1
239000002184 metal Substances 0.000 description 1
229940098779 methanesulfonic acid Drugs 0.000 description 1
229910017604 nitric acid Inorganic materials 0.000 description 1
230000009935 nitrosation Effects 0.000 description 1
238000007034 nitrosation reaction Methods 0.000 description 1
239000007800 oxidant agent Substances 0.000 description 1
230000003647 oxidation Effects 0.000 description 1
238000007254 oxidation reaction Methods 0.000 description 1
230000001590 oxidative effect Effects 0.000 description 1
150000004965 peroxy acids Chemical class 0.000 description 1
FHHJDRFHHWUPDG-UHFFFAOYSA-L peroxysulfate(2-) Chemical compound [O-]OS([O-])(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-L 0.000 description 1
CZPZWMPYEINMCF-UHFFFAOYSA-N propaneperoxoic acid Chemical compound CCC(=O)OO CZPZWMPYEINMCF-UHFFFAOYSA-N 0.000 description 1
239000002994 raw material Substances 0.000 description 1
238000004064 recycling Methods 0.000 description 1
235000010288 sodium nitrite Nutrition 0.000 description 1
239000000126 substance Substances 0.000 description 1
RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 1
231100000331 toxic Toxicity 0.000 description 1
230000002588 toxic effect Effects 0.000 description 1
239000002023 wood Substances 0.000 description 1

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
- 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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- 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
- D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids

Landscapes

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

JP9536800A 1996-04-12 1997-04-11 紙パルプを酸素脱リグニンするための方法 Pending JPH11508001A (ja)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
FR96/04627		1996-04-12
FR9604627A FR2747406B1 (fr)	1996-04-12	1996-04-12	Procede de delignification a l'oxygene d'une pate a papier
PCT/FR1997/000647 WO1997039180A1 (fr)	1996-04-12	1997-04-11	Procede de delignification a l'oxygene d'une pate a papier

Publications (1)

Publication Number	Publication Date
JPH11508001A true JPH11508001A (ja)	1999-07-13

Family

ID=9491170

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
JP9536800A Pending JPH11508001A (ja)	1996-04-12	1997-04-11	紙パルプを酸素脱リグニンするための方法

Country Status (8)

Country	Link
EP (1)	EP0832322A1 (id)
JP (1)	JPH11508001A (id)
AU (1)	AU711672B2 (id)
BR (1)	BR9702127A (id)
CA (1)	CA2224713A1 (id)
FR (1)	FR2747406B1 (id)
ID (1)	ID16579A (id)
WO (1)	WO1997039180A1 (id)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US6899790B2 (en)	2000-03-06	2005-05-31	Georgia-Pacific Corporation	Method of providing papermaking fibers with durable curl
US6627041B2 (en) *	2000-03-06	2003-09-30	Georgia-Pacific Corporation	Method of bleaching and providing papermaking fibers with durable curl

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5091054A (en) *	1989-08-18	1992-02-25	Degussa Corporation	Process for bleaching and delignification of lignocellulosic
BE1006057A3 (fr) *	1992-07-06	1994-05-03	Solvay Interox	Procede pour la delignification d'une pate a papier chimique.

1996
- 1996-04-12 FR FR9604627A patent/FR2747406B1/fr not_active Expired - Fee Related
1997
- 1997-04-11 CA CA 2224713 patent/CA2224713A1/fr not_active Abandoned
- 1997-04-11 WO PCT/FR1997/000647 patent/WO1997039180A1/fr not_active Ceased
- 1997-04-11 BR BR9702127A patent/BR9702127A/pt not_active Application Discontinuation
- 1997-04-11 AU AU26415/97A patent/AU711672B2/en not_active Ceased
- 1997-04-11 JP JP9536800A patent/JPH11508001A/ja active Pending
- 1997-04-11 EP EP97918207A patent/EP0832322A1/fr not_active Withdrawn
- 1997-04-14 ID IDP971227A patent/ID16579A/id unknown

Also Published As

Publication number	Publication date
AU2641597A (en)	1997-11-07
CA2224713A1 (fr)	1997-10-23
FR2747406A1 (fr)	1997-10-17
EP0832322A1 (fr)	1998-04-01
ID16579A (id)	1997-10-16
BR9702127A (pt)	1999-01-05
WO1997039180A1 (fr)	1997-10-23
FR2747406B1 (fr)	1998-08-28
AU711672B2 (en)	1999-10-21

Publication	Publication Date	Title
US4661205A (en)	1987-04-28	Method of bleaching lignocellulosic material with peroxide catalyzed with a salt of a metal
US5785812A (en)	1998-07-28	Process for treating oxygen delignified pulp using an organic peracid or salt, complexing agent and peroxide bleach sequence
US6221209B1 (en)	2001-04-24	Multi-stage bleaching process having a final stabilized peroxide stage
CA1259456A (en)	1989-09-19	Enhanced oxidative extraction
CA2017807C (en)	1995-12-19	Process for bleaching lignocellulose-containing pulps
CA1119360A (en)	1982-03-09	Method for bleaching oxygen delignified cellulose-containing pulp with ozone
FI59433C (fi)	1981-08-10	Tryckloest flerstegsfoerfarande foer klorfattig blekning av cellulosa
Gellerstedt et al.	1982	Chemical aspects of hydrogen peroxide bleaching. Part II the bleaching of kraft pulps
US6007678A (en)	1999-12-28	Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof
US5645686A (en)	1997-07-08	Process for bleaching a pulp in a sequence including an enzyme stage
JPH0217679B2 (id)	1990-04-23
CA1221809A (en)	1987-05-19	Process for delignification of chemical wood pulp
Danielewicz	2023	The effect of treating pine regular kraft pulp with peracetic acid before O2-delignification on the consumption of ClO2 in D0ED1 bleaching
EP0464110B1 (en)	1994-06-08	Bleaching process for the production of high bright pulps
JPH0314687A (ja)	1991-01-23	過酸化水素を補給した酸素脱リグニン化法
JPH11508001A (ja)	1999-07-13	紙パルプを酸素脱リグニンするための方法
CA2149649C (en)	2000-09-19	Process for bleaching of lignocellulose-containing pulp
Hart	2019	Pulp bleaching
Valchev	2020	Chemical pulp bleaching
FI62869C (fi)	1983-03-10	Foerfarande i flera steg foer klorfattig helblekning av cellulosa
WO1994005851A1 (en)	1994-03-17	Novel method of bleaching of lignocellulosic pulp using persulphate
WO1997036040A1 (en)	1997-10-02	Ozone-bleached organosolv pulps
JP2020514564A (ja)	2020-05-21	紙パルプを漂白するための方法
Brogdon et al.	2001	Pressurized peroxide bleaching of kraft pulps employing organophosphonate-based bleach stabilizers
Basta	2017	United States Patent (19) Linsten et al. 54 PROCESS FOR TREATING OXYGEN DELGN FED PULP USNG AN ORGANIC PERACID OR SALT, COMPLEXINGAGENT AND PEROXIDE BLEACH SEQUENCE 75