JPH0217679B2 - - Google Patents
Info
- Publication number
- JPH0217679B2 JPH0217679B2 JP58011603A JP1160383A JPH0217679B2 JP H0217679 B2 JPH0217679 B2 JP H0217679B2 JP 58011603 A JP58011603 A JP 58011603A JP 1160383 A JP1160383 A JP 1160383A JP H0217679 B2 JPH0217679 B2 JP H0217679B2
- Authority
- JP
- Japan
- Prior art keywords
- treatment
- pulp
- acid
- peroxide
- solution
- Prior art date
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 42
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 37
- 239000000243 solution Substances 0.000 claims description 24
- 150000002978 peroxides Chemical class 0.000 claims description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000010306 acid treatment Methods 0.000 claims description 15
- 229920001131 Pulp (paper) Polymers 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 3
- 239000012670 alkaline solution Substances 0.000 claims description 3
- 150000007522 mineralic acids Chemical class 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 claims description 2
- 238000004061 bleaching Methods 0.000 description 12
- 239000002655 kraft paper Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 150000001768 cations Chemical class 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000002023 wood Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 6
- 229920005610 lignin Polymers 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 239000004155 Chlorine dioxide Substances 0.000 description 3
- UDHXJZHVNHGCEC-UHFFFAOYSA-N Chlorophacinone Chemical compound C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)C(=O)C1C(=O)C2=CC=CC=C2C1=O UDHXJZHVNHGCEC-UHFFFAOYSA-N 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 235000019398 chlorine dioxide Nutrition 0.000 description 3
- 239000011121 hardwood Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007655 standard test method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241001070947 Fagus Species 0.000 description 2
- 235000010099 Fagus sylvatica Nutrition 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 1
- 239000004343 Calcium peroxide Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 description 1
- 235000019402 calcium peroxide Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 229960001922 sodium perborate Drugs 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- YKLJGMBLPUQQOI-UHFFFAOYSA-M sodium;oxidooxy(oxo)borane Chemical compound [Na+].[O-]OB=O YKLJGMBLPUQQOI-UHFFFAOYSA-M 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- -1 sulfite anhydride Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8201603 | 1982-01-28 | ||
| FR8201603A FR2520397A1 (fr) | 1982-01-28 | 1982-01-28 | Procede pour le traitement de pates papetieres chimiques |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58132190A JPS58132190A (ja) | 1983-08-06 |
| JPH0217679B2 true JPH0217679B2 (es) | 1990-04-23 |
Family
ID=9270561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58011603A Granted JPS58132190A (ja) | 1982-01-28 | 1983-01-28 | 製紙用ケミカルパルプの処理方法 |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS58132190A (es) |
| KR (1) | KR850001341B1 (es) |
| AT (1) | AT381736B (es) |
| BE (1) | BE895645A (es) |
| BR (1) | BR8300402A (es) |
| CA (1) | CA1206704A (es) |
| CH (1) | CH653720A5 (es) |
| DE (1) | DE3302580A1 (es) |
| ES (1) | ES8400520A1 (es) |
| FI (1) | FI76134C (es) |
| FR (1) | FR2520397A1 (es) |
| IT (1) | IT1162810B (es) |
| NO (1) | NO161391C (es) |
| OA (1) | OA07313A (es) |
| PT (1) | PT76145B (es) |
| SE (1) | SE462288B (es) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1227304A (en) * | 1984-08-01 | 1987-09-29 | Raymond C. Francis | Delignification of pulp |
| FR2593527B1 (fr) * | 1986-01-30 | 1988-03-25 | Centre Tech Ind Papier | Procede de blanchiment des pates mecaniques. |
| ATE97179T1 (de) * | 1989-06-06 | 1993-11-15 | Eka Nobel Ab | Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen. |
| US5246543A (en) * | 1989-08-18 | 1993-09-21 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic materials |
| US5091054A (en) * | 1989-08-18 | 1992-02-25 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic |
| DE3937932A1 (de) * | 1989-11-15 | 1991-05-16 | Holtzmann & Cie Ag E | Verfahren zum delignifizieren und bleichen von ungebleichten zellstoffsuspensionen mit alkalichlorit |
| SE466061B (sv) * | 1990-04-23 | 1991-12-09 | Eka Nobel Ab | Blekning av kemisk massa genom behandling med foerst ett komplexbildande aemne och sedan ett peroxidinnehaallande aemne |
| SE9001481L (sv) * | 1990-04-23 | 1991-10-24 | Eka Nobel Ab | Reduktion av halogenorganiska foereningar i blekeriavlopp |
| US6398908B1 (en) | 1991-04-30 | 2002-06-04 | Eka Nobel Ab | Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound |
| SE470065C (sv) * | 1991-04-30 | 1996-01-15 | Eka Nobel Ab | Behandling av kemisk massa med en syra och därefter en magnesium- och kalciumförening vid klorfri blekning |
| SE500113C2 (sv) * | 1992-07-09 | 1994-04-18 | Kamyr Ab | Sätt vid blekning av massa för omhändertagande av utlösta metaller |
| SE512137C2 (sv) * | 1992-10-29 | 2000-01-31 | Eka Chemicals Ab | Förfarande för blekning av lignocellulosahaltig massa |
| SE500616C2 (sv) * | 1993-06-08 | 1994-07-25 | Kvaerner Pulping Tech | Blekning av kemisk massa med peroxid vid övertryck |
| US6776876B1 (en) | 1994-10-13 | 2004-08-17 | Andritz Oy | Method of treating cellulosic pulp to remove hexenuronic acid |
| US6736934B1 (en) | 1995-02-17 | 2004-05-18 | Andritz Oy | Method of pretreating pulp in an acid tower prior to bleaching with peroxide |
| SE526241C2 (sv) * | 2003-12-18 | 2005-08-02 | Metso Paper Inc | Förfarande för att surgöra lignocellulosahaltig massa före ozonblekning |
| US8080560B2 (en) | 2004-12-17 | 2011-12-20 | 3M Innovative Properties Company | Immune response modifier formulations containing oleic acid and methods |
| US8889154B2 (en) | 2005-09-15 | 2014-11-18 | Medicis Pharmaceutical Corporation | Packaging for 1-(2-methylpropyl)-1H-imidazo[4,5-c] quinolin-4-amine-containing formulation |
| US8980051B2 (en) | 2009-04-24 | 2015-03-17 | International Paper Company | Sulfonation of pulp produced by alkali pulping process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51102103A (en) * | 1975-03-05 | 1976-09-09 | Nippon Parupu Kogyo Kk | Ryusanenhoparupuno hyohakuhoho |
| JPS5455606A (en) * | 1977-09-20 | 1979-05-02 | Degussa | Chemical postttreating method and production of needleeleaf pulp for special paper |
| JPS5685489A (en) * | 1979-12-10 | 1981-07-11 | Kogyo Gijutsuin | Pulp production |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1705897A (en) * | 1922-03-16 | 1929-03-19 | Bradley Linn | Bleaching of pulp |
| FR1010501A (fr) * | 1948-08-31 | 1952-06-12 | Papiers Abadie Sa Des | Procédé de blanchîment des pâtes cellulosiques |
| US2668095A (en) * | 1950-09-22 | 1954-02-02 | Du Pont | Bleaching chemical paper pulp |
| FR1201712A (fr) * | 1958-07-11 | 1960-01-05 | Fr Du Xylon Soc | Perfectionnements au blanchiment des pâtes cellulosiques |
| FR2398839A1 (fr) * | 1977-07-29 | 1979-02-23 | Centre Tech Ind Papier | Procede de fabrication de pates papetieres chimiques |
-
1982
- 1982-01-28 FR FR8201603A patent/FR2520397A1/fr active Granted
- 1982-12-22 SE SE8207356A patent/SE462288B/sv unknown
- 1982-12-23 KR KR8205769A patent/KR850001341B1/ko active
-
1983
- 1983-01-07 IT IT67014/83A patent/IT1162810B/it active
- 1983-01-19 BE BE0/209926A patent/BE895645A/fr not_active IP Right Cessation
- 1983-01-25 CA CA000420203A patent/CA1206704A/fr not_active Expired
- 1983-01-26 PT PT76145A patent/PT76145B/pt not_active IP Right Cessation
- 1983-01-26 DE DE19833302580 patent/DE3302580A1/de active Granted
- 1983-01-27 NO NO830268A patent/NO161391C/no unknown
- 1983-01-27 BR BR8300402A patent/BR8300402A/pt not_active IP Right Cessation
- 1983-01-27 ES ES519327A patent/ES8400520A1/es not_active Expired
- 1983-01-27 AT AT0026383A patent/AT381736B/de not_active IP Right Cessation
- 1983-01-27 FI FI830288A patent/FI76134C/fi not_active IP Right Cessation
- 1983-01-27 CH CH463/83A patent/CH653720A5/fr not_active IP Right Cessation
- 1983-01-28 JP JP58011603A patent/JPS58132190A/ja active Granted
- 1983-01-28 OA OA57907A patent/OA07313A/xx unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51102103A (en) * | 1975-03-05 | 1976-09-09 | Nippon Parupu Kogyo Kk | Ryusanenhoparupuno hyohakuhoho |
| JPS5455606A (en) * | 1977-09-20 | 1979-05-02 | Degussa | Chemical postttreating method and production of needleeleaf pulp for special paper |
| JPS5685489A (en) * | 1979-12-10 | 1981-07-11 | Kogyo Gijutsuin | Pulp production |
Also Published As
| Publication number | Publication date |
|---|---|
| FI76134C (fi) | 1988-09-09 |
| DE3302580A1 (de) | 1983-08-04 |
| NO830268L (no) | 1983-07-29 |
| IT8367014A0 (it) | 1983-01-07 |
| IT1162810B (it) | 1987-04-01 |
| FI830288L (fi) | 1983-07-29 |
| SE8207356L (sv) | 1983-07-29 |
| BE895645A (fr) | 1983-07-19 |
| BR8300402A (pt) | 1983-11-01 |
| CH653720A5 (fr) | 1986-01-15 |
| ATA26383A (de) | 1986-04-15 |
| NO161391B (no) | 1989-05-02 |
| FR2520397B1 (es) | 1984-03-09 |
| PT76145B (fr) | 1985-11-25 |
| SE462288B (sv) | 1990-05-28 |
| FR2520397A1 (fr) | 1983-07-29 |
| ES519327A0 (es) | 1983-10-16 |
| CA1206704A (fr) | 1986-07-02 |
| KR850001341B1 (ko) | 1985-09-19 |
| OA07313A (fr) | 1984-08-31 |
| AT381736B (de) | 1986-11-25 |
| ES8400520A1 (es) | 1983-10-16 |
| NO161391C (no) | 1989-08-09 |
| JPS58132190A (ja) | 1983-08-06 |
| DE3302580C2 (es) | 1992-07-02 |
| PT76145A (fr) | 1983-02-01 |
| FI76134B (fi) | 1988-05-31 |
| FI830288A0 (fi) | 1983-01-27 |
| SE8207356D0 (sv) | 1982-12-22 |
| KR840002934A (ko) | 1984-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0217679B2 (es) | ||
| EP0402335B1 (en) | Process for bleaching lignocellulose-containing pulps | |
| US4661205A (en) | Method of bleaching lignocellulosic material with peroxide catalyzed with a salt of a metal | |
| US5785812A (en) | Process for treating oxygen delignified pulp using an organic peracid or salt, complexing agent and peroxide bleach sequence | |
| US4626319A (en) | Process for the delignification and acid bleaching of cellulose with oxygen and hydrogen peroxide | |
| JPH05148784A (ja) | リグノセルロース含有パルプの漂白方法 | |
| EP0456626B1 (en) | Process for bleaching of lignocellulose-containing material | |
| NZ248029A (en) | Bleaching chemical paper pulp using hydrogen peroxide in alkaline medium with stabilising agent present, reduced manganese content of treated pulp | |
| US3725194A (en) | Treatment of alkaline pulp with an acidic medium followed by oxygen bleaching and delignification | |
| JP2588495B2 (ja) | 製紙用高収率高漂白度パルプの製造方法 | |
| CA1221809A (en) | Process for delignification of chemical wood pulp | |
| KR930002072B1 (ko) | 과산화수소 강화된 산소 탈리그닌화 방법 | |
| EP0464110B1 (en) | Bleaching process for the production of high bright pulps | |
| US10006168B2 (en) | Method for treating chemical pulps by treatment with ozone in the presence of magnesium ions | |
| US6679972B1 (en) | Process for the bleaching of a pulp suspension by separating calcium from lignin | |
| RU2097463C1 (ru) | Способ отбеливания лигноцеллюлозосодержащей пульпы | |
| CA1042612A (en) | Process for delignification and bleaching of cellulose pulp | |
| JPS6214678B2 (es) | ||
| US4729817A (en) | Process for the oxidative delignification of demethylated chemical pulp | |
| US20150184346A1 (en) | Sulfonation of pulp produced by alkali pulping process | |
| JPH05195467A (ja) | ケミカルペーパーパルプの脱リグニン化の選択性を改良するための方法 | |
| RU2072014C1 (ru) | Способ отбеливания лигноцеллюлозосодержащей древесной пульпы | |
| AU711672B2 (en) | Process for oxygen delignification of a paper pulp | |
| CA1274655A (en) | Process for the bleaching of ns-aq or sap pulp | |
| RU2097462C1 (ru) | Способ делигнификации и отбеливания лигноцеллюлозосодержащей пульпы |