FI66032B - Foerfarande vid delignifiering av cellulosamassa - Google Patents
Foerfarande vid delignifiering av cellulosamassa Download PDFInfo
- Publication number
- FI66032B FI66032B FI822193A FI822193A FI66032B FI 66032 B FI66032 B FI 66032B FI 822193 A FI822193 A FI 822193A FI 822193 A FI822193 A FI 822193A FI 66032 B FI66032 B FI 66032B
- Authority
- FI
- Finland
- Prior art keywords
- pulp
- process according
- pretreatment
- oxygen
- washing
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- 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 claims description 9
- 239000003513 alkali Substances 0.000 claims description 9
- 229960003330 pentetic acid Drugs 0.000 claims description 9
- 238000004061 bleaching Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 229920002678 cellulose Polymers 0.000 claims description 5
- 239000001913 cellulose Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 150000007513 acids Chemical class 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 2
- 239000002585 base Substances 0.000 claims description 2
- 150000001768 cations Chemical class 0.000 claims description 2
- 238000010411 cooking Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000706 filtrate Substances 0.000 claims 1
- 230000035484 reaction time Effects 0.000 claims 1
- 238000002474 experimental method Methods 0.000 description 14
- 238000011282 treatment Methods 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000003755 preservative agent Substances 0.000 description 5
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical class OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 159000000003 magnesium salts Chemical class 0.000 description 4
- 239000008139 complexing agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002335 preservative effect Effects 0.000 description 3
- 159000000000 sodium salts Chemical class 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 206010067484 Adverse reaction Diseases 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000006838 adverse reaction Effects 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 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 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 230000002123 temporal effect Effects 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- 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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Claims (12)
1. Metod för delignifiering av cellulosamassa med alkali i närvaro av syre, pzon, luft eller blandning av dem, kännetecknad därav, att före delignifieringen 5 förbehandlas massa med salter av aminopolykarboxylsyror, till exempel Na- salter av dietylentriaminpentaättiksyra eller etylendiamintetraättiksyra och att delignifieringen utföres utan att använda Mg-föreningar som skyddsmedel.
2. Metod enligt patentkrav 1, kännetecknad 10 därav, att massan tvättas och/eller komprimeras före syra- alkalidelignifiering, varvid den innehäller frän koket här-rörande torrsubstans upp till 3,5 % per ton massa.
3. Metod enligt patentkrav 1 eller 2, kännetecknad därav, att förbehandlingen sker under en tid av 15 2-30 min, lämpligast 5-10 min.
4. Metod enligt nägot av patentkraven 1-3, kännetecknad därav, att förbehandlingstjockheten är 0,5 - 8 %, lämpligast 2 - 5 %.
5. Metod enligt nägot av patentkraven 1 -4, känne-20 tecknad därav, att vid förbehandlingen användes tempe- raturer av 60 - 100°C, företrädesvis 80 - 95°C.
6. Metod enligt nägot av patentkraven 1-5, känne-tecknad därav, att aminopolykarboxylsyrornas salter doseras till förbehandlingen 0,05 - 0,5 %, lämpligast 0,10 - 25 0,30 % per ton massa.
7. Metod enligt nägot av patentkraven 1-6, kännetecknad därav, att efter förbehandling tvättas eller pressas ur massan de därtill doserade kemikaiierna samt de till dem bundna kajonerna i ett eller flera skeden före syre- 30 alkalidelignifieringen.
8. Metod enligt nägot av patentkraven 1 - 7, kännetecknad därav, att förbehandlingen utföres under mas-sans sortering före syre-alkalidelignifieringen.
9. Metod enligt nägot av patentkraven 1 -8, kanne-35 tecknad därav, att förbehandlingen utföres under mas- sans s.k. motströmningstvättning sälunda, att förbehandlings-kemikalierna tillsättes i tvättlösningen.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI822193A FI66032C (fi) | 1982-06-18 | 1982-06-18 | Foerfarande vid delignifiering av cellulosamassa |
| SE8303428A SE8303428L (sv) | 1982-06-18 | 1983-06-15 | Forfarande av delignifiering av cellulosamassa |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI822193A FI66032C (fi) | 1982-06-18 | 1982-06-18 | Foerfarande vid delignifiering av cellulosamassa |
| FI822193 | 1982-06-18 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| FI822193A0 FI822193A0 (fi) | 1982-06-18 |
| FI822193L FI822193L (fi) | 1983-12-19 |
| FI66032B true FI66032B (fi) | 1984-04-30 |
| FI66032C FI66032C (fi) | 1984-08-10 |
Family
ID=8515719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI822193A FI66032C (fi) | 1982-06-18 | 1982-06-18 | Foerfarande vid delignifiering av cellulosamassa |
Country Status (2)
| Country | Link |
|---|---|
| FI (1) | FI66032C (sv) |
| SE (1) | SE8303428L (sv) |
-
1982
- 1982-06-18 FI FI822193A patent/FI66032C/fi not_active IP Right Cessation
-
1983
- 1983-06-15 SE SE8303428A patent/SE8303428L/sv not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| SE8303428L (sv) | 1983-12-19 |
| SE8303428D0 (sv) | 1983-06-15 |
| FI66032C (fi) | 1984-08-10 |
| FI822193A0 (fi) | 1982-06-18 |
| FI822193L (fi) | 1983-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2007200969B2 (en) | Hardwood Alkaline Pulping Processes and Systems | |
| JP2592747B2 (ja) | リグノセルロース含有パルプの漂白方法 | |
| US4087318A (en) | Oxygen-alkali delignification of lignocellulosic material in the presence of a manganese compound | |
| JPS6320953B2 (sv) | ||
| JPH0327191A (ja) | リグノセルロース含有パルプの漂白方法 | |
| JPH08503750A (ja) | リグノセルロース含有パルプの脱リグニン化法 | |
| JPH0796756B2 (ja) | リグノセルロース含有材料の漂白方法 | |
| US6413367B1 (en) | Treatment of cellulosic material with a chelating agent prior to alkaline delignification | |
| US4406735A (en) | Process for alkaline oxygen gas bleaching of cellulose pulp | |
| FI99153C (sv) | Ett förfarande för väteperoxidblekning av högutbytespappersmassor | |
| US6475338B1 (en) | Method of minimizing transition metal ions during chemical pulping in a digester by adding chelating agent to the digester | |
| FI66032C (fi) | Foerfarande vid delignifiering av cellulosamassa | |
| RU2479683C2 (ru) | Способы и системы для отбеливания лигноцеллюлозных масс после варки с содой и антрахиноном | |
| JPH08503749A (ja) | リグノセルロース含有パルプの漂白方法 | |
| US20020139497A1 (en) | Metal extraction prior to chelation in chemical pulp production | |
| WO2001075220A1 (en) | A method for controlling the delignification and bleaching of a pulp suspension | |
| CA2745466C (en) | Increasing alkaline pulping yield for softwood with metal ions | |
| AU726599B2 (en) | Treatment of pulp with a chelating agent without using a bleaching tower | |
| US5980689A (en) | Method of separating metal ions from pulp using a chelating agent | |
| FI115641B (sv) | Blekningsprocess för högutbytesmassor | |
| FI103817B (sv) | Förfarande för förbehandling av massa som skall blekas med peroxid | |
| WO1998014657A1 (en) | Oxidation of disturbing metal ions in bleaching processes | |
| JP2001140181A (ja) | 非木材パルプの漂白方法 | |
| CA2330409A1 (en) | Metal extraction prior to chelation in chemical pulp production | |
| CA2144677A1 (en) | Method of tcf or ecf bleaching of cellulose pulp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Patent lapsed |
Owner name: RAUMA-REPOLA OY |