FI70440C - Foerfarande foer framstaellning av kemikaliska pappersmassor - Google Patents
Foerfarande foer framstaellning av kemikaliska pappersmassor Download PDFInfo
- Publication number
- FI70440C FI70440C FI782342A FI782342A FI70440C FI 70440 C FI70440 C FI 70440C FI 782342 A FI782342 A FI 782342A FI 782342 A FI782342 A FI 782342A FI 70440 C FI70440 C FI 70440C
- Authority
- FI
- Finland
- Prior art keywords
- weight
- cooking
- peroxide
- stage
- sodium hydroxide
- Prior art date
Links
- 239000000126 substance Substances 0.000 title description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 92
- 238000000034 method Methods 0.000 claims description 56
- 150000002978 peroxides Chemical class 0.000 claims description 33
- 230000008569 process Effects 0.000 claims description 28
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 17
- 239000000243 solution Substances 0.000 claims description 11
- 229920001131 Pulp (paper) Polymers 0.000 claims description 10
- 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 claims description 7
- 150000004056 anthraquinones Chemical class 0.000 claims description 7
- -1 aromatic nitrogen derivatives Chemical class 0.000 claims description 5
- 239000012978 lignocellulosic material Substances 0.000 claims description 5
- 239000012670 alkaline solution Substances 0.000 claims description 4
- 239000007858 starting material Substances 0.000 claims description 4
- 150000003997 cyclic ketones Chemical class 0.000 claims description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims 3
- VEPOHXYIFQMVHW-XOZOLZJESA-N 2,3-dihydroxybutanedioic acid (2S,3S)-3,4-dimethyl-2-phenylmorpholine Chemical compound OC(C(O)C(O)=O)C(O)=O.C[C@H]1[C@@H](OCCN1C)c1ccccc1 VEPOHXYIFQMVHW-XOZOLZJESA-N 0.000 claims 1
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 claims 1
- 239000007864 aqueous solution Substances 0.000 claims 1
- 238000009835 boiling Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000010411 cooking Methods 0.000 description 55
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 24
- 229910021653 sulphate ion Inorganic materials 0.000 description 22
- 239000001301 oxygen Substances 0.000 description 16
- 229910052760 oxygen Inorganic materials 0.000 description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000000376 reactant Substances 0.000 description 11
- 230000008901 benefit Effects 0.000 description 10
- 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 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000004155 Chlorine dioxide Substances 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 7
- 238000004061 bleaching Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 235000019398 chlorine dioxide Nutrition 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000011282 treatment Methods 0.000 description 7
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 6
- 235000005205 Pinus Nutrition 0.000 description 5
- 241000218602 Pinus <genus> Species 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- 239000004115 Sodium Silicate Substances 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000546 pharmaceutical excipient Substances 0.000 description 4
- 229910052911 sodium silicate Inorganic materials 0.000 description 4
- 239000011122 softwood Substances 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 241001070947 Fagus Species 0.000 description 3
- 235000010099 Fagus sylvatica Nutrition 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229920005610 lignin Polymers 0.000 description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 3
- 235000019341 magnesium sulphate Nutrition 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 235000014347 soups Nutrition 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 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
- FZERHIULMFGESH-UHFFFAOYSA-N N-phenylacetamide Chemical compound CC(=O)NC1=CC=CC=C1 FZERHIULMFGESH-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- IVAOQJNBYYIDSI-UHFFFAOYSA-N [O].[Na] Chemical compound [O].[Na] IVAOQJNBYYIDSI-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- HNYOPLTXPVRDBG-UHFFFAOYSA-N barbituric acid Chemical compound O=C1CC(=O)NC(=O)N1 HNYOPLTXPVRDBG-UHFFFAOYSA-N 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- 241000609240 Ambelania acida Species 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
- 241000254173 Coleoptera Species 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- CCBJETYDMFCKJZ-UHFFFAOYSA-L [OH-].[OH-].[Na+].[Cl+] Chemical compound [OH-].[OH-].[Na+].[Cl+] CCBJETYDMFCKJZ-UHFFFAOYSA-L 0.000 description 1
- 229960001413 acetanilide Drugs 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- LBAYFEDWGHXMSM-UHFFFAOYSA-N butaneperoxoic acid Chemical compound CCCC(=O)OO LBAYFEDWGHXMSM-UHFFFAOYSA-N 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
- 150000001768 cations Chemical class 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- CZPZWMPYEINMCF-UHFFFAOYSA-N propaneperoxoic acid Chemical compound CCC(=O)OO CZPZWMPYEINMCF-UHFFFAOYSA-N 0.000 description 1
- 238000004076 pulp bleaching Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229960001922 sodium perborate Drugs 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- YKLJGMBLPUQQOI-UHFFFAOYSA-M sodium;oxidooxy(oxo)borane Chemical compound [Na+].[O-]OB=O YKLJGMBLPUQQOI-UHFFFAOYSA-M 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage processes
Landscapes
- Paper (AREA)
- Materials For Medical Uses (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7724131A FR2398839A1 (fr) | 1977-07-29 | 1977-07-29 | Procede de fabrication de pates papetieres chimiques |
| FR7724131 | 1977-07-29 | ||
| FR7820715A FR2430475A2 (fr) | 1978-07-05 | 1978-07-05 | Procede de fabrication de pates papetieres chimiques |
| FR7820715 | 1978-07-05 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI782342A7 FI782342A7 (fi) | 1979-01-30 |
| FI70440B FI70440B (fi) | 1986-03-27 |
| FI70440C true FI70440C (fi) | 1986-09-19 |
Family
ID=26220161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI782342A FI70440C (fi) | 1977-07-29 | 1978-07-27 | Foerfarande foer framstaellning av kemikaliska pappersmassor |
Country Status (10)
| Country | Link |
|---|---|
| AT (1) | AT371860B (de) |
| BE (1) | BE869153A (de) |
| CA (1) | CA1128260A (de) |
| CH (1) | CH634362A5 (de) |
| DE (1) | DE2833115C3 (de) |
| ES (1) | ES472184A1 (de) |
| FI (1) | FI70440C (de) |
| IT (1) | IT1160561B (de) |
| NO (1) | NO151975C (de) |
| SE (1) | SE439172B (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2493365A1 (fr) * | 1980-11-06 | 1982-05-07 | Tech Ind Papiers Carton Centre | Procede pour la fabrication de pate papetiere chimique et pate ainsi obtenue |
| IT202000019033A1 (it) * | 2020-08-03 | 2022-02-03 | Davide Bertinazzo | Metodo per ottenere un precursore di un materiale ibrido legno-inorganico e metodo per ottenere un materiale ibrido legno-inorganico |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA895756A (en) * | 1970-04-03 | 1972-03-21 | Macmillan Bloedel Limited | Two-stage soda-oxygen pulping |
| DE2327900C3 (de) * | 1973-06-01 | 1985-02-07 | Degussa Ag, 6000 Frankfurt | Bleichaufschluß von Zellstoff mit erheblich reduziertem Chloreinsatz |
| CA1073161A (en) * | 1975-09-05 | 1980-03-11 | Canadian Industries Limited | Delignification process |
-
1978
- 1978-07-20 BE BE189399A patent/BE869153A/xx not_active IP Right Cessation
- 1978-07-26 NO NO78782573A patent/NO151975C/no unknown
- 1978-07-27 FI FI782342A patent/FI70440C/fi not_active IP Right Cessation
- 1978-07-27 SE SE7808202A patent/SE439172B/sv not_active IP Right Cessation
- 1978-07-27 AT AT0546578A patent/AT371860B/de not_active IP Right Cessation
- 1978-07-27 CA CA308,295A patent/CA1128260A/fr not_active Expired
- 1978-07-28 DE DE2833115A patent/DE2833115C3/de not_active Expired
- 1978-07-28 IT IT68812/78A patent/IT1160561B/it active
- 1978-07-28 ES ES472184A patent/ES472184A1/es not_active Expired
- 1978-07-28 CH CH815678A patent/CH634362A5/fr not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE2833115C3 (de) | 1986-04-17 |
| SE7808202L (sv) | 1979-01-30 |
| DE2833115B2 (de) | 1980-07-03 |
| ES472184A1 (es) | 1979-02-16 |
| CA1128260A (fr) | 1982-07-27 |
| NO782573L (no) | 1979-01-30 |
| NO151975B (no) | 1985-04-01 |
| CH634362A5 (en) | 1983-01-31 |
| DE2833115A1 (de) | 1979-02-08 |
| ATA546578A (de) | 1982-12-15 |
| NO151975C (no) | 1985-07-10 |
| IT7868812A0 (it) | 1978-07-28 |
| AT371860B (de) | 1983-08-10 |
| IT1160561B (it) | 1987-03-11 |
| SE439172B (sv) | 1985-06-03 |
| FI782342A7 (fi) | 1979-01-30 |
| BE869153A (fr) | 1979-01-22 |
| FI70440B (fi) | 1986-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7671075B2 (ja) | 硫酸組成物およびその使用 | |
| FI59433C (fi) | Tryckloest flerstegsfoerfarande foer klorfattig blekning av cellulosa | |
| WO2011154847A2 (en) | Methods for manufacturing paper fibers and bioethanol from lignocellulosic biomass | |
| EA005240B1 (ru) | Способ отбеливания целлюлозы для производства бумаги | |
| FI83437C (fi) | Sulfitkokfoerfarande foer framstaellning av cellulosa ur lignocellulosahaltiga material. | |
| US4473439A (en) | Process for pulping lignocellulosic material | |
| JP2010144273A (ja) | リグノセルロース物質の化学パルプの製造方法 | |
| US3707437A (en) | Pulping and bleaching of wood chips in a single stage with tertiary butyl hydroperoxide | |
| EP0494519A1 (de) | Hochausbeute Aufschlussverfahren | |
| JPH08511308A (ja) | リグノセルロース材料を脱リグニン化する改良されたオゾン/過酸法 | |
| US3951732A (en) | Delignification and bleaching of wood pulp with oxygen in the presence of triethanolamine | |
| CA3110390A1 (en) | Modified sulfuric acid and uses thereof | |
| US4826568A (en) | Process for delignification of cellulosic substances by pretreating with a complexing agent followed by peroxide prior to kraft digestion | |
| RU2019613C1 (ru) | Способ отбелки лиственной сульфатной целлюлозы | |
| CA1080914A (en) | Pulping of hardwood with sodium sulfide and sodium hydroxide while generating hydrogen sulfide in situ in the initial pulping stages | |
| EP0464110B1 (de) | Bleichverfahren zur herstellung von hochweissem zellstoff | |
| FI70440C (fi) | Foerfarande foer framstaellning av kemikaliska pappersmassor | |
| NZ199486A (en) | Process for chemimechanical pulp production;using alkaline peroxide liquor | |
| US4787959A (en) | Process for preparing chemical paper pulps by cooking, intermediate grinding and a final alkaline peroxide delignification | |
| JPS5891884A (ja) | 高白色度未晒パルプの製造方法 | |
| RU2135665C1 (ru) | Способ получения целлюлозной массы | |
| US2947657A (en) | Extraction of cellulose from vegetable matter | |
| EP0213376B1 (de) | Verfahren zur Delignifizierung von Zellulosematerialien | |
| Scott et al. | Biosulfite pulping using Ceriporiopsis subvermispora | |
| CA1216105A (en) | Pulping process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Patent lapsed | ||
| MM | Patent lapsed |
Owner name: PRODUITS CHIMIQUES UGINE KUHLMANN |