CA2332304C - Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps - Google Patents
Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps Download PDFInfo
- Publication number
- CA2332304C CA2332304C CA002332304A CA2332304A CA2332304C CA 2332304 C CA2332304 C CA 2332304C CA 002332304 A CA002332304 A CA 002332304A CA 2332304 A CA2332304 A CA 2332304A CA 2332304 C CA2332304 C CA 2332304C
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- peroxide
- oxygen
- lignin
- pulps
- 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000001301 oxygen Substances 0.000 title claims abstract description 52
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 52
- 238000005282 brightening Methods 0.000 title claims abstract description 42
- 150000002978 peroxides Chemical class 0.000 title abstract description 36
- 239000002894 chemical waste Substances 0.000 title description 2
- 239000010812 mixed waste Substances 0.000 title description 2
- 229920005610 lignin Polymers 0.000 claims abstract description 60
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 46
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 46
- 239000011777 magnesium Substances 0.000 claims abstract description 35
- 150000002681 magnesium compounds Chemical class 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000243 solution Substances 0.000 claims description 48
- 229920001131 Pulp (paper) Polymers 0.000 claims description 36
- 239000003513 alkali Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 229910052749 magnesium Inorganic materials 0.000 claims description 16
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 39
- 229910052723 transition metal Inorganic materials 0.000 abstract description 22
- 150000003624 transition metals Chemical class 0.000 abstract description 22
- 229910019440 Mg(OH) Inorganic materials 0.000 abstract description 20
- 150000004760 silicates Chemical class 0.000 abstract description 12
- 229910052681 coesite Inorganic materials 0.000 abstract description 11
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 11
- 229910052682 stishovite Inorganic materials 0.000 abstract description 11
- 229910052905 tridymite Inorganic materials 0.000 abstract description 11
- 150000001768 cations Chemical class 0.000 abstract description 10
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 238000000354 decomposition reaction Methods 0.000 abstract description 7
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 4
- 150000001451 organic peroxides Chemical class 0.000 abstract description 3
- 238000006116 polymerization reaction Methods 0.000 abstract description 3
- 150000001720 carbohydrates Chemical class 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 45
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 28
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 28
- 239000002023 wood Substances 0.000 description 17
- 239000000126 substance Substances 0.000 description 15
- 235000019341 magnesium sulphate Nutrition 0.000 description 14
- 238000004537 pulping Methods 0.000 description 14
- 239000000654 additive Substances 0.000 description 13
- 238000004061 bleaching Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000002655 kraft paper Substances 0.000 description 10
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- 238000007792 addition Methods 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000011575 calcium Substances 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 6
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- -1 perhydroxyl anion Chemical class 0.000 description 5
- 150000003254 radicals Chemical class 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- FGZBFIYFJUAETR-UHFFFAOYSA-N calcium;magnesium;silicate Chemical compound [Mg+2].[Ca+2].[O-][Si]([O-])([O-])[O-] FGZBFIYFJUAETR-UHFFFAOYSA-N 0.000 description 4
- UNYOJUYSNFGNDV-UHFFFAOYSA-M magnesium monohydroxide Chemical compound [Mg]O UNYOJUYSNFGNDV-UHFFFAOYSA-M 0.000 description 4
- 239000000391 magnesium silicate Substances 0.000 description 4
- 239000000123 paper Substances 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 239000004155 Chlorine dioxide Substances 0.000 description 3
- 229920002488 Hemicellulose Polymers 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 229910020169 SiOa Inorganic materials 0.000 description 3
- 150000001728 carbonyl compounds Chemical class 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 235000019398 chlorine dioxide Nutrition 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000009849 deactivation Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- MMIPFLVOWGHZQD-UHFFFAOYSA-N manganese(3+) Chemical compound [Mn+3] MMIPFLVOWGHZQD-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000000269 nucleophilic effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000011122 softwood Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 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
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 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 2
- 238000013459 approach Methods 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 235000019792 magnesium silicate Nutrition 0.000 description 2
- 229910052919 magnesium silicate Inorganic materials 0.000 description 2
- 235000012243 magnesium silicates Nutrition 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000013055 pulp slurry Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910052979 sodium sulfide Inorganic materials 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229940123150 Chelating agent Drugs 0.000 description 1
- VMQMZMRVKUZKQL-UHFFFAOYSA-N Cu+ Chemical compound [Cu+] VMQMZMRVKUZKQL-UHFFFAOYSA-N 0.000 description 1
- 101100348017 Drosophila melanogaster Nazo gene Proteins 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000002198 insoluble material Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229940096405 magnesium cation Drugs 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 235000012254 magnesium hydroxide Nutrition 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012038 nucleophile Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000000108 ultra-filtration Methods 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
- D21C9/147—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
- D21C9/1026—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
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1998/010070 WO1999060201A2 (en) | 1998-05-15 | 1998-05-15 | Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2332304A1 CA2332304A1 (en) | 1999-11-25 |
| CA2332304C true CA2332304C (en) | 2005-01-11 |
Family
ID=22267079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002332304A Expired - Lifetime CA2332304C (en) | 1998-05-15 | 1998-05-15 | Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1088130B1 (de) |
| AT (1) | ATE263268T1 (de) |
| AU (1) | AU7493898A (de) |
| CA (1) | CA2332304C (de) |
| DE (1) | DE69822893D1 (de) |
| MX (1) | MXPA00011196A (de) |
| WO (1) | WO1999060201A2 (de) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2557605B1 (fr) * | 1983-12-29 | 1987-12-11 | Atochem | Procede de blanchiment de pates papetieres par le peroxyde d'hydrogene |
| US4915785A (en) * | 1988-12-23 | 1990-04-10 | C-I-L Inc. | Single stage process for bleaching of pulp with an aqueous hydrogen peroxide bleaching composition containing magnesium sulphate and sodium silicate |
| SE500353C2 (sv) * | 1992-10-26 | 1994-06-06 | Sca Wifsta Oestrand Ab | Peroxidblekning av sulfatmassa med tillsats av magnesium före blekningen |
-
1998
- 1998-05-15 EP EP98922379A patent/EP1088130B1/de not_active Expired - Lifetime
- 1998-05-15 CA CA002332304A patent/CA2332304C/en not_active Expired - Lifetime
- 1998-05-15 AU AU74938/98A patent/AU7493898A/en not_active Abandoned
- 1998-05-15 DE DE69822893T patent/DE69822893D1/de not_active Expired - Lifetime
- 1998-05-15 AT AT98922379T patent/ATE263268T1/de not_active IP Right Cessation
- 1998-05-15 MX MXPA00011196A patent/MXPA00011196A/es not_active IP Right Cessation
- 1998-05-15 WO PCT/US1998/010070 patent/WO1999060201A2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| MXPA00011196A (es) | 2003-04-22 |
| EP1088130A2 (de) | 2001-04-04 |
| ATE263268T1 (de) | 2004-04-15 |
| EP1088130B1 (de) | 2004-03-31 |
| CA2332304A1 (en) | 1999-11-25 |
| DE69822893D1 (de) | 2004-05-06 |
| AU7493898A (en) | 1999-12-06 |
| WO1999060201A2 (en) | 1999-11-25 |
| WO1999060201A3 (en) | 2000-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20180515 |