CA2989264A1 - Methods for bleaching aqueous pulps and compositions for use in these methods - Google Patents
Methods for bleaching aqueous pulps and compositions for use in these methodsInfo
- Publication number
- CA2989264A1 CA2989264A1 CA2989264A CA2989264A CA2989264A1 CA 2989264 A1 CA2989264 A1 CA 2989264A1 CA 2989264 A CA2989264 A CA 2989264A CA 2989264 A CA2989264 A CA 2989264A CA 2989264 A1 CA2989264 A1 CA 2989264A1
- Authority
- CA
- Canada
- Prior art keywords
- earth metal
- alkaline earth
- pulp
- bleaching
- composition
- 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.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 156
- 238000000034 method Methods 0.000 title claims abstract description 95
- 238000004061 bleaching Methods 0.000 title claims description 87
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 54
- -1 alkaline earth metal salts Chemical class 0.000 claims abstract description 49
- 230000008569 process Effects 0.000 claims abstract description 48
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 claims abstract description 44
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims abstract description 43
- 239000000654 additive Substances 0.000 claims abstract description 35
- 238000004076 pulp bleaching Methods 0.000 claims abstract description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 60
- 239000002002 slurry Substances 0.000 claims description 29
- 239000002253 acid Substances 0.000 claims description 28
- 239000007787 solid Substances 0.000 claims description 28
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 24
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 24
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 24
- 239000004615 ingredient Substances 0.000 claims description 23
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 22
- 239000000454 talc Substances 0.000 claims description 21
- 229910052623 talc Inorganic materials 0.000 claims description 21
- 230000000996 additive effect Effects 0.000 claims description 20
- 239000000440 bentonite Substances 0.000 claims description 18
- 229910000278 bentonite Inorganic materials 0.000 claims description 18
- 239000007844 bleaching agent Substances 0.000 claims description 17
- 239000000123 paper Substances 0.000 claims description 17
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 15
- 239000011777 magnesium Substances 0.000 claims description 15
- 229910052749 magnesium Inorganic materials 0.000 claims description 15
- 239000011707 mineral Substances 0.000 claims description 15
- 230000002378 acidificating effect Effects 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 13
- 239000001569 carbon dioxide Substances 0.000 claims description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 12
- 239000004291 sulphur dioxide Substances 0.000 claims description 12
- 235000010269 sulphur dioxide Nutrition 0.000 claims description 12
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 11
- 235000011149 sulphuric acid Nutrition 0.000 claims description 11
- 230000015556 catabolic process Effects 0.000 claims description 10
- 238000006731 degradation reaction Methods 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 239000001117 sulphuric acid Substances 0.000 claims description 9
- 125000002091 cationic group Chemical group 0.000 claims description 8
- 239000002738 chelating agent Substances 0.000 claims description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 235000019353 potassium silicate Nutrition 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- 239000006179 pH buffering agent Substances 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 102000004190 Enzymes Human genes 0.000 claims description 4
- 108090000790 Enzymes Proteins 0.000 claims description 4
- 239000005909 Kieselgur Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910021536 Zeolite Inorganic materials 0.000 claims description 4
- 239000001164 aluminium sulphate Substances 0.000 claims description 4
- 235000011128 aluminium sulphate Nutrition 0.000 claims description 4
- 230000002902 bimodal effect Effects 0.000 claims description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 4
- 229920006317 cationic polymer Polymers 0.000 claims description 4
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 claims description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 239000010457 zeolite Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 10
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 46
- 239000000347 magnesium hydroxide Substances 0.000 description 46
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 46
- 235000012254 magnesium hydroxide Nutrition 0.000 description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 150000002978 peroxides Chemical class 0.000 description 15
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 14
- 235000012216 bentonite Nutrition 0.000 description 14
- 229940092782 bentonite Drugs 0.000 description 14
- 235000010755 mineral Nutrition 0.000 description 13
- 229920001131 Pulp (paper) Polymers 0.000 description 11
- 239000002655 kraft paper Substances 0.000 description 8
- 239000011122 softwood Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 7
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 7
- 235000019341 magnesium sulphate Nutrition 0.000 description 7
- 229910021653 sulphate ion Inorganic materials 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 5
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 229910019479 Mg(SO4) Inorganic materials 0.000 description 3
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910001425 magnesium ion Inorganic materials 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 159000000003 magnesium salts Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000003019 stabilising effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- 206010053567 Coagulopathies Diseases 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910019440 Mg(OH) Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000002292 Radical scavenging effect Effects 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052599 brucite Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- QXDMQSPYEZFLGF-UHFFFAOYSA-L calcium oxalate Chemical compound [Ca+2].[O-]C(=O)C([O-])=O QXDMQSPYEZFLGF-UHFFFAOYSA-L 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- YLUIKWVQCKSMCF-UHFFFAOYSA-N calcium;magnesium;oxygen(2-) Chemical compound [O-2].[O-2].[Mg+2].[Ca+2] YLUIKWVQCKSMCF-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000035602 clotting Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- AQEDFGUKQJUMBV-UHFFFAOYSA-N copper;ethane-1,2-diamine Chemical compound [Cu].NCCN AQEDFGUKQJUMBV-UHFFFAOYSA-N 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- HZKFXVSDNZJPND-UHFFFAOYSA-J dimagnesium disulfate Chemical compound [Mg+2].[Mg+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O HZKFXVSDNZJPND-UHFFFAOYSA-J 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009897 hydrogen peroxide bleaching Methods 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 229910052615 phyllosilicate Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 239000002351 wastewater 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
- D21C9/1063—Bleaching ; Apparatus therefor with compounds not otherwise provided for, e.g. activated gases
-
- 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
- D21C9/1026—Other features in bleaching processes
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
-
- 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
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
-
- 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
- D21C9/1026—Other features in bleaching processes
-
- 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
- D21C9/1026—Other features in bleaching processes
- D21C9/1042—Use of chelating agents
-
- 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
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/32—Bleaching agents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15306543.8 | 2015-09-30 | ||
| EP15306543 | 2015-09-30 | ||
| EP16305924.9 | 2016-07-18 | ||
| EP16305924 | 2016-07-18 | ||
| PCT/EP2016/073350 WO2017055504A1 (en) | 2015-09-30 | 2016-09-29 | Methods for bleaching aqueous pulps and compositions for use in these methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2989264A1 true CA2989264A1 (en) | 2017-04-06 |
Family
ID=57208245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2989264A Pending CA2989264A1 (en) | 2015-09-30 | 2016-09-29 | Methods for bleaching aqueous pulps and compositions for use in these methods |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20180155871A1 (no) |
| EP (1) | EP3356596A1 (no) |
| JP (1) | JP7013246B2 (no) |
| KR (1) | KR20180061089A (no) |
| CN (2) | CN118308895A (no) |
| BR (1) | BR112017027022B1 (no) |
| CA (1) | CA2989264A1 (no) |
| WO (1) | WO2017055504A1 (no) |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3127241A (en) * | 1964-03-31 | Preparation of magnesium hydroxide | ||
| US2168228A (en) * | 1936-12-28 | 1939-08-01 | Carey Philip Mfg Co | Suspension of magnesium hydroxide and materials and process for making same |
| US2231327A (en) * | 1937-09-25 | 1941-02-11 | Morton Salt Co | Preparation of magnesium products |
| US2255422A (en) * | 1939-02-23 | 1941-09-09 | Dow Chemical Co | Process for the production of magnesium hydroxide |
| US3301633A (en) * | 1964-01-24 | 1967-01-31 | Dow Chemical Co | Process for production of magnesium hydroxide and calcium chloride |
| GB1262655A (en) * | 1968-09-20 | 1972-02-02 | Canadian Ind | Bleaching of wood pulp |
| SE335053B (no) * | 1969-05-13 | 1971-05-10 | Mo Och Domsjoe Ab | |
| HU183533B (en) * | 1981-07-30 | 1984-05-28 | Bela Racz | Process for producing aquous bitumen-composition |
| 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 |
| US5665205A (en) * | 1995-01-19 | 1997-09-09 | International Paper Company | Method for improving brightness and cleanliness of secondary fibers for paper and paperboard manufacture |
| CA2211223C (en) * | 1995-02-17 | 2002-04-30 | Ahlstrom Machinery Oy | Method of pretreating pulp to be bleached with peroxide |
| FI112958B (fi) * | 1997-12-19 | 2004-02-13 | Kemira Oyj | Menetelmä kemiallisen massan valkaisemiseksi sekä valkaisuliuoksen käyttö |
| DE10040178A1 (de) * | 2000-08-17 | 2002-03-07 | Wacker Chemie Gmbh | Verdickungsmittel auf der Basis von Vinylalkohol-Mischpolymerisaten |
| WO2007111946A2 (en) * | 2006-03-23 | 2007-10-04 | Hercules Incorporated | Improved paper for gypsum wallboard |
| FR2937656B1 (fr) * | 2008-10-24 | 2010-11-19 | Arkema France | Procede de fabrication de pate a papier |
| GB2514840A (en) * | 2013-06-07 | 2014-12-10 | Imerys Minerals Ltd | Compositions for bleaching pulps and their use |
| FR3007044B1 (fr) * | 2013-06-13 | 2016-01-15 | Air Liquide | Procede de traitement des pates papetieres chimiques par traitement a l'ozone en presence d'ions magnesium |
-
2016
- 2016-09-29 EP EP16787737.2A patent/EP3356596A1/en active Pending
- 2016-09-29 CN CN202410441658.XA patent/CN118308895A/zh active Pending
- 2016-09-29 JP JP2017566320A patent/JP7013246B2/ja active Active
- 2016-09-29 CA CA2989264A patent/CA2989264A1/en active Pending
- 2016-09-29 BR BR112017027022-6A patent/BR112017027022B1/pt active IP Right Grant
- 2016-09-29 CN CN201680037901.5A patent/CN107709657A/zh active Pending
- 2016-09-29 KR KR1020177037776A patent/KR20180061089A/ko not_active Application Discontinuation
- 2016-09-29 WO PCT/EP2016/073350 patent/WO2017055504A1/en active Application Filing
- 2016-09-29 US US15/735,964 patent/US20180155871A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JP7013246B2 (ja) | 2022-02-15 |
| KR20180061089A (ko) | 2018-06-07 |
| BR112017027022A2 (no) | 2018-08-21 |
| CN118308895A (zh) | 2024-07-09 |
| EP3356596A1 (en) | 2018-08-08 |
| WO2017055504A1 (en) | 2017-04-06 |
| JP2018534439A (ja) | 2018-11-22 |
| US20180155871A1 (en) | 2018-06-07 |
| CN107709657A (zh) | 2018-02-16 |
| BR112017027022B1 (pt) | 2023-04-18 |
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