WO2009067382A1 - Fluorometric method for monitoring surface additives in a papermaking process - Google Patents
Fluorometric method for monitoring surface additives in a papermaking process Download PDFInfo
- Publication number
- WO2009067382A1 WO2009067382A1 PCT/US2008/083472 US2008083472W WO2009067382A1 WO 2009067382 A1 WO2009067382 A1 WO 2009067382A1 US 2008083472 W US2008083472 W US 2008083472W WO 2009067382 A1 WO2009067382 A1 WO 2009067382A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- surface additives
- sheet
- papermaking process
- fluorescence
- coating
- Prior art date
Links
- 239000000654 additive Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 86
- 230000008569 process Effects 0.000 title claims abstract description 54
- 238000012544 monitoring process Methods 0.000 title claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 48
- 230000004044 response Effects 0.000 claims abstract description 8
- 229920002472 Starch Polymers 0.000 claims description 28
- 239000008107 starch Substances 0.000 claims description 28
- 235000019698 starch Nutrition 0.000 claims description 28
- 239000000123 paper Substances 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 8
- 150000008054 sulfonate salts Chemical class 0.000 claims description 8
- AUNGANRZJHBGPY-SCRDCRAPSA-N Riboflavin Chemical compound OC[C@@H](O)[C@@H](O)[C@@H](O)CN1C=2C=C(C)C(C)=CC=2N=C2C1=NC(=O)NC2=O AUNGANRZJHBGPY-SCRDCRAPSA-N 0.000 claims description 6
- FPIPGXGPPPQFEQ-OVSJKPMPSA-N all-trans-retinol Chemical compound OC\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-OVSJKPMPSA-N 0.000 claims description 6
- LXNHXLLTXMVWPM-UHFFFAOYSA-N pyridoxine Chemical compound CC1=NC=C(CO)C(CO)=C1O LXNHXLLTXMVWPM-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 claims description 4
- FPIPGXGPPPQFEQ-UHFFFAOYSA-N 13-cis retinol Natural products OCC=C(C)C=CC=C(C)C=CC1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-UHFFFAOYSA-N 0.000 claims description 4
- ZKHQWZAMYRWXGA-KQYNXXCUSA-N Adenosine triphosphate Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP(O)(=O)OP(O)(=O)OP(O)(O)=O)[C@@H](O)[C@H]1O ZKHQWZAMYRWXGA-KQYNXXCUSA-N 0.000 claims description 4
- AUNGANRZJHBGPY-UHFFFAOYSA-N D-Lyxoflavin Natural products OCC(O)C(O)C(O)CN1C=2C=C(C)C(C)=CC=2N=C2C1=NC(=O)NC2=O AUNGANRZJHBGPY-UHFFFAOYSA-N 0.000 claims description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 4
- RYYVLZVUVIJVGH-UHFFFAOYSA-N caffeine Chemical compound CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 claims description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 4
- GNBHRKFJIUUOQI-UHFFFAOYSA-N fluorescein Chemical compound O1C(=O)C2=CC=CC=C2C21C1=CC=C(O)C=C1OC1=CC(O)=CC=C21 GNBHRKFJIUUOQI-UHFFFAOYSA-N 0.000 claims description 4
- BOPGDPNILDQYTO-NNYOXOHSSA-N nicotinamide-adenine dinucleotide Chemical compound C1=CCC(C(=O)N)=CN1[C@H]1[C@H](O)[C@H](O)[C@@H](COP(O)(=O)OP(O)(=O)OC[C@@H]2[C@H]([C@@H](O)[C@@H](O2)N2C3=NC=NC(N)=C3N=C2)O)O1 BOPGDPNILDQYTO-NNYOXOHSSA-N 0.000 claims description 4
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 claims description 4
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 claims description 4
- 229960002477 riboflavin Drugs 0.000 claims description 4
- 229940011671 vitamin b6 Drugs 0.000 claims description 4
- 229930027945 nicotinamide-adenine dinucleotide Natural products 0.000 claims description 3
- VIFBEEYZXDDZCT-UHFFFAOYSA-N 2-(2-phenylethenyl)benzenesulfonic acid Chemical class OS(=O)(=O)C1=CC=CC=C1C=CC1=CC=CC=C1 VIFBEEYZXDDZCT-UHFFFAOYSA-N 0.000 claims description 2
- RIOSJKSGNLGONI-UHFFFAOYSA-N 2-phenylbenzenesulfonic acid Chemical class OS(=O)(=O)C1=CC=CC=C1C1=CC=CC=C1 RIOSJKSGNLGONI-UHFFFAOYSA-N 0.000 claims description 2
- 239000004258 Ethoxyquin Substances 0.000 claims description 2
- LPHGQDQBBGAPDZ-UHFFFAOYSA-N Isocaffeine Natural products CN1C(=O)N(C)C(=O)C2=C1N(C)C=N2 LPHGQDQBBGAPDZ-UHFFFAOYSA-N 0.000 claims description 2
- COLNVLDHVKWLRT-QMMMGPOBSA-N L-phenylalanine Chemical compound OC(=O)[C@@H](N)CC1=CC=CC=C1 COLNVLDHVKWLRT-QMMMGPOBSA-N 0.000 claims description 2
- QIVBCDIJIAJPQS-VIFPVBQESA-N L-tryptophane Chemical compound C1=CC=C2C(C[C@H](N)C(O)=O)=CNC2=C1 QIVBCDIJIAJPQS-VIFPVBQESA-N 0.000 claims description 2
- OUYCCCASQSFEME-QMMMGPOBSA-N L-tyrosine Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-QMMMGPOBSA-N 0.000 claims description 2
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- PJANXHGTPQOBST-VAWYXSNFSA-N Stilbene Natural products C=1C=CC=CC=1/C=C/C1=CC=CC=C1 PJANXHGTPQOBST-VAWYXSNFSA-N 0.000 claims description 2
- QIVBCDIJIAJPQS-UHFFFAOYSA-N Tryptophan Natural products C1=CC=C2C(CC(N)C(O)=O)=CNC2=C1 QIVBCDIJIAJPQS-UHFFFAOYSA-N 0.000 claims description 2
- FPIPGXGPPPQFEQ-BOOMUCAASA-N Vitamin A Natural products OC/C=C(/C)\C=C\C=C(\C)/C=C/C1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-BOOMUCAASA-N 0.000 claims description 2
- 229930003471 Vitamin B2 Natural products 0.000 claims description 2
- 229930003427 Vitamin E Natural products 0.000 claims description 2
- CUOZYXPNIFEQTK-UHFFFAOYSA-N benzenesulfonic acid;formaldehyde Chemical compound O=C.OS(=O)(=O)C1=CC=CC=C1 CUOZYXPNIFEQTK-UHFFFAOYSA-N 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 239000004305 biphenyl Substances 0.000 claims description 2
- 235000010290 biphenyl Nutrition 0.000 claims description 2
- 229960001948 caffeine Drugs 0.000 claims description 2
- VJEONQKOZGKCAK-UHFFFAOYSA-N caffeine Natural products CN1C(=O)N(C)C(=O)C2=C1C=CN2C VJEONQKOZGKCAK-UHFFFAOYSA-N 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- DECIPOUIJURFOJ-UHFFFAOYSA-N ethoxyquin Chemical compound N1C(C)(C)C=C(C)C2=CC(OCC)=CC=C21 DECIPOUIJURFOJ-UHFFFAOYSA-N 0.000 claims description 2
- 235000019285 ethoxyquin Nutrition 0.000 claims description 2
- 229940093500 ethoxyquin Drugs 0.000 claims description 2
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 claims description 2
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 claims description 2
- WIGCFUFOHFEKBI-UHFFFAOYSA-N gamma-tocopherol Natural products CC(C)CCCC(C)CCCC(C)CCCC1CCC2C(C)C(O)C(C)C(C)C2O1 WIGCFUFOHFEKBI-UHFFFAOYSA-N 0.000 claims description 2
- 235000019357 lignosulphonate Nutrition 0.000 claims description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 2
- COLNVLDHVKWLRT-UHFFFAOYSA-N phenylalanine Natural products OC(=O)C(N)CC1=CC=CC=C1 COLNVLDHVKWLRT-UHFFFAOYSA-N 0.000 claims description 2
- 230000000704 physical effect Effects 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- 239000004014 plasticizer Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- DLOBKMWCBFOUHP-UHFFFAOYSA-N pyrene-1-sulfonic acid Chemical class C1=C2C(S(=O)(=O)O)=CC=C(C=C3)C2=C2C3=CC=CC2=C1 DLOBKMWCBFOUHP-UHFFFAOYSA-N 0.000 claims description 2
- RADKZDMFGJYCBB-UHFFFAOYSA-N pyridoxal hydrochloride Natural products CC1=NC=C(CO)C(C=O)=C1O RADKZDMFGJYCBB-UHFFFAOYSA-N 0.000 claims description 2
- 229960003471 retinol Drugs 0.000 claims description 2
- 235000020944 retinol Nutrition 0.000 claims description 2
- 239000011607 retinol Substances 0.000 claims description 2
- 235000019192 riboflavin Nutrition 0.000 claims description 2
- 239000002151 riboflavin Substances 0.000 claims description 2
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical compound C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 claims description 2
- 235000021286 stilbenes Nutrition 0.000 claims description 2
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 claims description 2
- MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 claims description 2
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 claims description 2
- 235000012141 vanillin Nutrition 0.000 claims description 2
- 229940117960 vanillin Drugs 0.000 claims description 2
- 235000019155 vitamin A Nutrition 0.000 claims description 2
- 239000011719 vitamin A Substances 0.000 claims description 2
- 235000019164 vitamin B2 Nutrition 0.000 claims description 2
- 239000011716 vitamin B2 Substances 0.000 claims description 2
- 235000019158 vitamin B6 Nutrition 0.000 claims description 2
- 239000011726 vitamin B6 Substances 0.000 claims description 2
- 235000019165 vitamin E Nutrition 0.000 claims description 2
- 239000011709 vitamin E Substances 0.000 claims description 2
- 229940046009 vitamin E Drugs 0.000 claims description 2
- 229940045997 vitamin a Drugs 0.000 claims description 2
- 235000004835 α-tocopherol Nutrition 0.000 claims 1
- 150000003772 α-tocopherols Chemical class 0.000 claims 1
- 230000000996 additive effect Effects 0.000 description 18
- 239000000700 radioactive tracer Substances 0.000 description 18
- 239000000523 sample Substances 0.000 description 13
- 239000000126 substance Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 4
- ZKHQWZAMYRWXGA-UHFFFAOYSA-N Adenosine triphosphate Natural products C1=NC=2C(N)=NC=NC=2N1C1OC(COP(O)(=O)OP(O)(=O)OP(O)(O)=O)C(O)C1O ZKHQWZAMYRWXGA-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 0 C*C(CC(CC(CC(CC(*)CC(*)CC(CC(*)CC[Cn])IC)C1CC1)N)I)CC(C(*)C(*)C(*)C(*)C(*)C(*)C(*)C(*)C(C*)O)(O)O Chemical compound C*C(CC(CC(CC(CC(*)CC(*)CC(CC(*)CC[Cn])IC)C1CC1)N)I)CC(C(*)C(*)C(*)C(*)C(*)C(*)C(*)C(*)C(C*)O)(O)O 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229960001456 adenosine triphosphate Drugs 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012417 linear regression Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011732 tocopherol Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N21/643—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
-
- 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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/78—Controlling or regulating not limited to any particular process or apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/8422—Investigating thin films, e.g. matrix isolation method
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/86—Investigating moving sheets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/34—Paper
- G01N33/346—Paper sheets
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/54—Starch
-
- 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
- D21H21/30—Luminescent or fluorescent substances, e.g. for optical bleaching
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N2021/6484—Optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8411—Application to online plant, process monitoring
- G01N2021/8416—Application to online plant, process monitoring and process controlling, not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/8422—Investigating thin films, e.g. matrix isolation method
- G01N2021/8427—Coatings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
- G01N2021/8917—Paper, also ondulated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/91—Investigating the presence of flaws or contamination using penetration of dyes, e.g. fluorescent ink
Definitions
- This invention pertains to monitoring and optionally controlling the addition of one or more surface additives to a papermaking process.
- a papermaker e.g. a boardmaker
- Past trials included metering size press applications, which allowed the reduction of starch via a blade application technique. While this allowed a significant reduction of starch in the range of 50- 70%, the risk associated with failures due to unpredicted and uncontrolled variations of starch pickup was too great to overcome. As a result, many papermakers reverted to puddle style size presses in order to ensure enough starch was added to the sheet.
- a more accurate and timely measurement of the amount of surface additives on a sheet is therefore desired. This potentially will allow the papermaker to drive addition rates to very low levels, while being able to quickly predict and control statistically out of specification addition rates.
- the present disclosure provides for a method of monitoring and optionally controlling the addition of one or more surface additives to a papermaking process comprising the following steps: (a) adding a known amount of one or more surface additives to a papermaking process either alone or in known proportion with a known amount of one or more inert fluorescent tracers, wherein the surface additives can only be added alone when the surface additives are capable of fluorescing; (b) measuring the fluorescence of the surface additives and/or one or more inert fluorescent tracers at a point subsequent to adding the surface additives and after a sheet has been formed, wherein the surface additives can only be measured when they are capable of fluorescing and wherein fluorescence is measured with a reflectance based fluorometer; (c) correlating the amount of fluorescence of the surface additives when they are capable of fluorescing and/or inert fluorescent tracers on a sheet with the concentration of the surface additives in a coating on a sheet and/or thickness
- Figure 1 shows a schematic of how a reflectance-based fluorometer would work in one embodiment of the invention.
- Figure 2 shows a graph of individual fluorescence vs. individual starch dry pick-up shown by a starch and inert fluorescent tracer combination.
- Papermaking process'V'papermaking processes refer to a method(s) of making any kind of paper products (e.g. paper, tissue, board, etc.) from pulp comprising forming an aqueous cellulosic papermaking furnish, draining the furnish to form a sheet and drying the sheet.
- the steps of forming the papermaking furnish, draining and drying may be carried out in any conventional manner generally known to those skilled in the art.
- the papermaking process/processes may also include a pulping stage, i.e. making pulp from woody raw material and bleaching stage, i.e. chemical treatment of the pulp for brightness improvement.
- Sheet'V'sheets refer to sheet(s) formed as a result of or during a papermaking process/papermaking processes.
- “Surface additive”/ “surface additives” refer to papermaking additive(s) that impart one or more chemical and/or physical (e.g. mechanical) properties on a sheet surface.
- the sheet can be a paper sheet, tissue sheet, board sheet, or any other type of sheet produced by a papermaking process.
- an imparted chemical property may allow "ink” to bind to the paper in a more efficacious manner.
- NADH refers to Nicotinamide Adenine Dinucleotide, reduced, and/or derivatives thereof.
- ATP means Adenosine Tri-Phosphate.
- one or more surface additives added to a papermaking process are tracked by a fluorometric-based protocol. This requires that the medium exposed to fluorescence is suitable for fluorometric measurement, e.g. the entire film depth of a coating is excited and its emission collected. One of ordinary skill in the art could determine this without undue experimentation.
- the fluorometric protocol includes the following approaches: (1) the one or more surface additives are capable of fluorescing, inherent and/or modified to fluoresce, e.g. with a fluorescent moiety or by reacting with an in-system molecule or by other means aside from inherent characteristics, (2) one or more inert fluorescent tracers are added in known proportion with the surface additives, or (3) a combination thereof.
- the fluorescence can be directly correlated to the concentration of the surface additive in a coating/thickness of a coating containing the surface additive, e.g. by calibrating fluorescence intensity with the concentration of the surface additive and/or thickness of a coating containing the surface additive.
- concentration of the surface additive in a coating/thickness of a coating containing the surface additive e.g. by calibrating fluorescence intensity with the concentration of the surface additive and/or thickness of a coating containing the surface additive.
- the surface additives are inherently fluorescent.
- a fluorescent moiety can be covalently attached to the non- fluorescent surface additives. Therefore, the functionalized surface additives have fluorescent properties.
- the inert fluorescent tracer is added in known proportion with the surface additive.
- the amount of surface additive or thickness of a coating containing a surface additive can be inferred from the fluorescence of the inert fluorescent tracer, e.g. by calibrating fluorescence intensity with concentration of the additive in a coating on a sheet and/or thickness of a coating containing the additive on a sheet.
- the inert fluorescent tracers can be added to a coating formulation at a specific known concentration such that by measuring the concentration of inert fluorescent tracers, the amount of the coating on a sheet or surface additives in a coating on a sheet can be inferred. It may also be possible to monitor both a surface additive that is fluorescent and an inert fluorescent tracer. The amount of the coating on a sheet or surface additives in a coating on a sheet can be inferred from the fluorescence of the inert fluorescent tracer and fluorescence of the surface additive, by calibrating fluorescence intensity with concentration of the additive in a coating on a sheet and/or thickness of a coating containing the additive on a sheet.
- concentration of the additive inert fluorescent tracer can be inferred from the fluorescence of the inert fluorescent tracer and fluorescence of the surface additive, by calibrating fluorescence intensity with concentration of the additive in a coating on a sheet and/or thickness of a coating containing the additive on a sheet.
- an inert fluorescent tracer is a substance, which is chemically non- reactive with any components in the papermaking process and does not itself degrade with time. It is completely soluble in the system at all relevant levels of concentration. Its fluorescence intensity is always/substantially proportional to its concentration and is not quenched or otherwise diminished by the system.
- an inert fluorescent tracer is an inert fluorescent tracer that is not appreciably or significantly affected by any other chemistry in a papermaking process. To quantify what is meant by "not appreciably or significantly affected”, this statement means that an inert fluorescent compound has no more than a 10% change in its fluorescent signal, under conditions normally encountered in papermaking process. Conditions normally encountered in a papermaking process are known to people of ordinary skill in the art of a papermaking process.
- the desired characteristics for an inert fluorescent tracer preferably include: high water solubility, excellent chemical stability, good fluorescence properties at manageable wavelengths (e.g. not be quenched by other additives in the sheet/paper sheet/board components), and can be monitored in the presence of common optical brightening agents, e.g. outside the wavelength of optical brighteners to prevent interference between optical brighteners and inert fluorescent tracers.
- the inert fluorescent tracer is a FDA-approved tracer, which is required, for example, in food packaging.
- one or more inert fluorescent tracers are selected from the group consisting of at least one of the following: fluorescein or fluorescein derivatives, rhodamine or rhodamine derivatives, a sulfonate salt of naphthalene, a sulfonate salt of pyrene, a sulfonate salt of stilbene, a sulfonate salt of biphenyl, phenylalanine, tryptophan, tyrosine, vitamin A (retinol), vitamin B2 (riboflavin), vitamin B6 (pyridoxin), vitamin E (cu-tocopherols), NADH, ATP, ethoxyquin, caffeine, vanillin, naphthalene sulfonate formaldehyde condensate, a phenyl sulfonate formaldehyde condensate, sulfonated lignin, a polymer containing at least one
- inert fluorescent tracers will vary.
- concentrations of inert fluorescent tracers can be determined without undue experimentation.
- concentrations of inert fluorescent tracers work better than lower concentrations of inert fluorescent tracers.
- the fluorometer utilized should be a reflectance-based fluorometer since it is desired to determine the thickness of an applied thin coating onto the surface of an opaque sheet. One or more may be utilized.
- a reflectance-based fluorometer is available from Nalco Company or Ocean Optics, Dunedin, FL.
- FIG. 1 A diagram of one embodiment of a reflectance-based fluorometer is given in Figure 1.
- the reflectance fluorometer uses an optical fiber to excite the tracer on a sheet and monitor its reflected fluorescence.
- a suitable light source such as an LED, xenon flash lamp or discharge lamp provides the excitation light.
- the raw source light is filtered by a suitable excitation filter (available from Semrock, Inc./Andover, Inc.) to remove unwanted wavelengths in the fluorescence emission region.
- the light is reflected at 90 degrees and additionally filtered by a dichroic filter to give a new beam along a different direction.
- the beam is focused onto the core of a fiber optic cable by an appropriate lens.
- the other end of the fiber optic is positioned close to or touching the surface of the paper sheet in order to illuminate a region of its surface causing fluorescence emission.
- the emission is captured by the same fiber which carries the reflected light back to the lens where it is collimated and directed back onto the dichroic filter. Reflected excitation light is reflected back to the source while the fluorescence passes straight through to an emission filter.
- a suitable optical detector such as a photodiode or photomultiplier tube, detects the filtered light.
- An optional reference detector can be used to correct for varying light source intensity.
- the surface additives are selected from the group consisting of at least one of the following: starch, pigments, binders, plasticizers, and other additives to improve the physical properties of a paper/board sheet, including surface strength, brightness, printability, water resistance, or adhesion of subsequent coatings.
- the surface additives contain a covalently bonded fluorescent moiety.
- the starch contains a covalently bonded fluorescent moiety.
- the surface additives may be added at various stages in the papermakmg process. In one embodiment, the surface additives are added between a forming section of a papermaking process and a press section of a papermaking process.
- the surface additives are added at the wet-end of a papermaking process. In another embodiment, the surface additives are added to a papermaking process between or at a water box and a sheet.
- the fluorescence of the sheet may be measured at various points in the papermaking process.
- the fluorescence is measured at some point after the press section. In another embodiment, the fluorescence is measured after the dryer section of a papermaking process.
- the fluorescence is measured after a dry line in a forming section.
- the fluorescence is measured proximate to the press section.
- the fluorescence of starch containing a covalently bonded fluorescent moiety and/or fluorescence of inert fluorescent tracers added in known proportion with the starch is measured after a dryer section and before a coating section of a papermaking process.
- the fluorescence of the surface additives and/or fluorescence of inert fluorescent tracers added in known proportion with said surface additives, excluding starch, are measured after the coating section of a papermaking process.
- Fluorescence may be measured at a fixed point (one point), e.g. a measurement in the machine-direction, or at plurality of points, e.g. scanning a plurality of points across the sheet in a cross-directional manner relative to the direction of travel of the paper sheet.
- a reflectance fluorometer may be utilized in various ways to carry out this task. One of ordinary skill in the art would appreciate various ways of carrying out this task.
- the fluorescence is measured at one point or a plurality of points.
- the fluorometer may be configured to measure in the machine direction, e.g. positioned at a fixed point.
- the measurement of a plurality of points occurs by scanning a fluorometer in a cross-directional manner relative to the direction of said sheet in said papermaking process, similar to the way other sheet monitoring instruments such as brightness or basis weight probes do.
- the fluorometer is configured so that on-line measurements can be taken.
- a controller may be utilized to implement the above-referenced protocol.
- One or more controllers are in communication with the fluorometer and are programmed with an algorithm to collect said fluorescence measurements, correlate the amount of fluorescence of the surface additives when they are capable of fluorescing and/or inert fluorescent tracers on a sheet with the concentration of the surface additives in a coating on a sheet and/or thickness of a coating on a sheet; and optionally adjust the amount of the surface additives added to the papermaking process in response to the coating thickness on a sheet and/or concentration of the surface additives in a coating on a sheet in accord with a pre-determined protocol. Adjusting the amount of the surface additives added to the papermaking process in response to the coating thickness on a sheet and/or concentration of the surface additives in a coating on a sheet can be done in various ways.
- a controller can implement this response or it can be done manually through a papermaking process operator.
- the adjustment can be done by various means.
- adjustment can be done through the use of a spray boom in which the feed rate of the surface additives to the paper sheet can be adjusted.
- the settings of a metering size press can be adjusted in response to the coating thickness on a sheet and/or concentration of the surface additives in a coating on a sheet to maintain a desired thickness or to maximize production tonnage rate or minimize over usage of additives or energy.
- Coat weight or coat thickness testing was performed following a standard testing protocol. Several coating solutions containing various amounts of coating solids were applied to the surface of test sample sheets. Preferably, the solid content and inert fluorescent tracer ratio was kept constant for all solutions.
- the coat weight on each sample sheet can be varied at the coating application time using various coating techniques. After drying, the dry coat weight, or pick-up, was measured by weight difference. Every individual sample sheet was weighed before and after coating application and the dry coat weight calculated by weight difference. The fluorescence intensity of the dry starch film was measured at several locations for a given sample sheet. The series of fluorescence intensities were then averaged to yield a single fluorescence intensity value for each sample sheet. Two different fluorometers were used to measure the fluorescence intensity of each sample sheet.
- a test was run following the above-described protocol with three starch solutions containing increasing starch solids while maintaining the starch and inert fluorescent tracer ratio constant.
- the substrate for each test was an uncoated 21 -point paperboard sheet.
- Each solution was applied on separate sample sheets at four different thicknesses via a manual application method.
- a fourth starch solution containing no inert fluorescent tracer was also applied to a series of sample sheets for comparison with the traced solutions.
- the blank used in this trial was an uncoated sample sheet
- Figure 2 shows the starch dry coat weight (pick-up, in g/m 2 ) plotted against the fluorescence intensity (in arbitrary units - relative fluorescence units (“RFU”)). Each point corresponds to an individual sample sheet.
- Figure 2 shows that the measured fluorescence intensities of the entire series of sample sheets measured fall on a line along the plot area diagonal.
- the linear regression on all points shows very clearly the direct and reliable correlation between the starch dry pick-up and the amount of inert fluorescent tracer present in the layer as measured by fluorescence intensity.
- the trend line has a y-intercept very close to zero and an R 2 - factor greater than 0.96. In a few cases, one point is significantly removed from the line.
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Abstract
Description
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Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0819044 BRPI0819044A2 (en) | 2007-11-19 | 2008-11-14 | "method of monitoring and optionally controlling the addition of one or more surface additives to a papermaking process" |
EP08852826A EP2212676A1 (en) | 2007-11-19 | 2008-11-14 | Fluorometric method for monitoring surface additives in a papermaking process |
RU2010123476/04A RU2487339C2 (en) | 2007-11-19 | 2008-11-14 | Fluorescent method of tracking of surface additives in papermaking process |
NZ585969A NZ585969A (en) | 2007-11-19 | 2008-11-14 | Fluorometric method for monitoring surface additives in a papermaking process |
AU2008326632A AU2008326632B2 (en) | 2007-11-19 | 2008-11-14 | Fluorometric method for monitoring surface additives in a papermaking process |
MX2010005501A MX2010005501A (en) | 2007-11-19 | 2008-11-14 | Fluorometric method for monitoring surface additives in a papermaking process. |
CN2008801162792A CN101861514B (en) | 2007-11-19 | 2008-11-14 | Fluorometric method for monitoring surface additives in a papermaking process |
CA2705293A CA2705293C (en) | 2007-11-19 | 2008-11-14 | Fluorometric method for monitoring surface additives in a papermaking process |
JP2010534193A JP2011503621A (en) | 2007-11-19 | 2008-11-14 | Fluorometric method for monitoring surface additives in the papermaking process |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/942,065 US20090126889A1 (en) | 2007-11-19 | 2007-11-19 | Fluorometric method for monitoring surface additives in a papermaking process |
US11/942,065 | 2007-11-19 |
Publications (1)
Publication Number | Publication Date |
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WO2009067382A1 true WO2009067382A1 (en) | 2009-05-28 |
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ID=40251760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2008/083472 WO2009067382A1 (en) | 2007-11-19 | 2008-11-14 | Fluorometric method for monitoring surface additives in a papermaking process |
Country Status (16)
Country | Link |
---|---|
US (1) | US20090126889A1 (en) |
EP (1) | EP2212676A1 (en) |
JP (1) | JP2011503621A (en) |
KR (1) | KR20100108340A (en) |
CN (1) | CN101861514B (en) |
AR (1) | AR069351A1 (en) |
AU (1) | AU2008326632B2 (en) |
BR (1) | BRPI0819044A2 (en) |
CA (1) | CA2705293C (en) |
CL (1) | CL2008003429A1 (en) |
MX (1) | MX2010005501A (en) |
MY (1) | MY156924A (en) |
NZ (1) | NZ585969A (en) |
RU (1) | RU2487339C2 (en) |
TW (1) | TW200940784A (en) |
WO (1) | WO2009067382A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2758595A4 (en) * | 2011-09-23 | 2015-06-03 | Nalco Co | Fluorometric method for monitoring surface additives in a papermaking process |
US10407591B2 (en) | 2014-12-02 | 2019-09-10 | Ecolab Usa Inc. | Low solids surface coating compositions and use thereof |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009058295A1 (en) * | 2009-12-10 | 2011-06-16 | Biostep Gmbh | Trans-illuminator for e.g. rear illumination of fluorescent material sample for qualitative and quantitative evaluation of sample in research laboratory, has adjustment component for adjustment of specific wave length |
CN106290278B (en) * | 2016-08-08 | 2018-10-19 | 南昌大学 | It is a kind of at the same detect vitamin B2, B6 concentration method |
CN113388355A (en) * | 2020-03-13 | 2021-09-14 | 上海蓝欧化工科技有限公司 | Fluorescent water-based adhesive, preparation method and application thereof |
EP4102223A1 (en) * | 2021-06-11 | 2022-12-14 | PulPac AB | Method for detecting a liquid composition applied onto a cellulose blank structure with a detection system and detection system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1348638A (en) * | 1971-08-13 | 1974-03-20 | Ici Ltd | Method of process control |
US3956630A (en) * | 1975-03-14 | 1976-05-11 | Westvaco Corporation | Fluorimetric coat weight measurement |
US5087670A (en) * | 1986-07-10 | 1992-02-11 | Minnesota Mining And Manufacturing Company | Process for fluorimetric monitoring of functional coatings and compositions and fluorescent agents therefor |
US20020039181A1 (en) * | 2000-05-09 | 2002-04-04 | Metso Paper Automation Oy | Modeling a coloring process |
US20030006385A1 (en) * | 2001-06-28 | 2003-01-09 | Banks Rodney H. | Mirror fluorometer |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU805147A1 (en) * | 1978-10-09 | 1981-02-15 | Украинское Научно-Производственноеобъединение Целлюлозно-Бумажнойпромышленности | Photoelectric meter of paper paremeters |
SE455441B (en) * | 1986-11-24 | 1988-07-11 | Refina Instr Ab | SET TO CONTROL AND / OR METE THE THICKNESS OF LAYERS SUCH AS SURFACE LAYER |
US4783314A (en) * | 1987-02-26 | 1988-11-08 | Nalco Chemical Company | Fluorescent tracers - chemical treatment monitors |
FI87492C (en) * | 1990-06-12 | 1993-01-11 | Valmet Paper Machinery Inc | Method and apparatus for measuring and controlling the amount of coating it |
US5152872A (en) * | 1990-10-15 | 1992-10-06 | Stone-Consolidated Inc. | Apparatus for the wet end coating of paper |
US5900113A (en) * | 1994-09-26 | 1999-05-04 | Nalco Chemical Company | Method of using fluorescent tracers to monitor chlorine dioxide in pulp and paper processes |
CA2251305A1 (en) * | 1997-10-24 | 1999-04-24 | Voith Sulzer Papiertechnik Patent Gmbh | Coating device and coating process for the wet section of a machine for the production of a material web, in particular of paper or cardboard |
GB9906011D0 (en) * | 1999-03-16 | 1999-05-12 | Whiley Foils Ltd | Fluorescent materials |
JP3304348B2 (en) * | 1999-03-29 | 2002-07-22 | 日本製紙株式会社 | High-molecular-weight thiourea compound with fluorescence |
US7910371B2 (en) * | 2005-01-20 | 2011-03-22 | Nalco Company | Method of monitoring treating agent residuals in water treatment processes |
-
2007
- 2007-11-19 US US11/942,065 patent/US20090126889A1/en not_active Abandoned
-
2008
- 2008-10-02 TW TW097137868A patent/TW200940784A/en unknown
- 2008-11-14 AU AU2008326632A patent/AU2008326632B2/en active Active
- 2008-11-14 RU RU2010123476/04A patent/RU2487339C2/en active
- 2008-11-14 EP EP08852826A patent/EP2212676A1/en not_active Withdrawn
- 2008-11-14 CN CN2008801162792A patent/CN101861514B/en active Active
- 2008-11-14 CA CA2705293A patent/CA2705293C/en active Active
- 2008-11-14 NZ NZ585969A patent/NZ585969A/en unknown
- 2008-11-14 JP JP2010534193A patent/JP2011503621A/en active Pending
- 2008-11-14 MY MYPI2010002339A patent/MY156924A/en unknown
- 2008-11-14 WO PCT/US2008/083472 patent/WO2009067382A1/en active Application Filing
- 2008-11-14 KR KR1020107013437A patent/KR20100108340A/en not_active Application Discontinuation
- 2008-11-14 BR BRPI0819044 patent/BRPI0819044A2/en not_active Application Discontinuation
- 2008-11-14 MX MX2010005501A patent/MX2010005501A/en active IP Right Grant
- 2008-11-18 AR ARP080105008A patent/AR069351A1/en unknown
- 2008-11-19 CL CL2008003429A patent/CL2008003429A1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1348638A (en) * | 1971-08-13 | 1974-03-20 | Ici Ltd | Method of process control |
US3956630A (en) * | 1975-03-14 | 1976-05-11 | Westvaco Corporation | Fluorimetric coat weight measurement |
US5087670A (en) * | 1986-07-10 | 1992-02-11 | Minnesota Mining And Manufacturing Company | Process for fluorimetric monitoring of functional coatings and compositions and fluorescent agents therefor |
US20020039181A1 (en) * | 2000-05-09 | 2002-04-04 | Metso Paper Automation Oy | Modeling a coloring process |
US20030006385A1 (en) * | 2001-06-28 | 2003-01-09 | Banks Rodney H. | Mirror fluorometer |
Non-Patent Citations (1)
Title |
---|
See also references of EP2212676A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2758595A4 (en) * | 2011-09-23 | 2015-06-03 | Nalco Co | Fluorometric method for monitoring surface additives in a papermaking process |
US10407591B2 (en) | 2014-12-02 | 2019-09-10 | Ecolab Usa Inc. | Low solids surface coating compositions and use thereof |
Also Published As
Publication number | Publication date |
---|---|
CN101861514A (en) | 2010-10-13 |
MX2010005501A (en) | 2010-08-03 |
TW200940784A (en) | 2009-10-01 |
CA2705293C (en) | 2017-07-18 |
NZ585969A (en) | 2012-03-30 |
MY156924A (en) | 2016-04-15 |
RU2010123476A (en) | 2011-12-27 |
AU2008326632B2 (en) | 2013-05-16 |
AR069351A1 (en) | 2010-01-13 |
EP2212676A1 (en) | 2010-08-04 |
RU2487339C2 (en) | 2013-07-10 |
KR20100108340A (en) | 2010-10-06 |
AU2008326632A1 (en) | 2009-05-28 |
US20090126889A1 (en) | 2009-05-21 |
CA2705293A1 (en) | 2009-05-28 |
CN101861514B (en) | 2013-08-28 |
CL2008003429A1 (en) | 2009-01-16 |
BRPI0819044A2 (en) | 2015-05-05 |
JP2011503621A (en) | 2011-01-27 |
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