EP1825056A2 - Bentonite for binding impurities during paper production - Google Patents
Bentonite for binding impurities during paper productionInfo
- Publication number
- EP1825056A2 EP1825056A2 EP05826382A EP05826382A EP1825056A2 EP 1825056 A2 EP1825056 A2 EP 1825056A2 EP 05826382 A EP05826382 A EP 05826382A EP 05826382 A EP05826382 A EP 05826382A EP 1825056 A2 EP1825056 A2 EP 1825056A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bentonite
- pulp
- cec
- paper
- less
- 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.)
- Granted
Links
- 229910000278 bentonite Inorganic materials 0.000 title claims abstract description 83
- 239000000440 bentonite Substances 0.000 title claims abstract description 83
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 239000012535 impurity Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 53
- 150000001768 cations Chemical class 0.000 claims abstract description 34
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 27
- 238000005341 cation exchange Methods 0.000 claims abstract description 12
- 239000000725 suspension Substances 0.000 claims description 29
- 239000000454 talc Substances 0.000 claims description 19
- 229910052623 talc Inorganic materials 0.000 claims description 19
- 239000000356 contaminant Substances 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 13
- 239000011575 calcium Substances 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- 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 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- -1 iron ions Chemical class 0.000 claims description 5
- 229910001424 calcium ion Inorganic materials 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 229920000867 polyelectrolyte Polymers 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 239000013055 pulp slurry Substances 0.000 abstract 2
- 235000012216 bentonite Nutrition 0.000 description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 38
- 235000012222 talc Nutrition 0.000 description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 14
- 239000000126 substance Substances 0.000 description 13
- 230000002209 hydrophobic effect Effects 0.000 description 11
- 239000004927 clay Substances 0.000 description 9
- 125000000129 anionic group Chemical group 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 238000007792 addition Methods 0.000 description 7
- 229910000281 calcium bentonite Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000000684 flow cytometry Methods 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000706 filtrate Substances 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000004913 activation Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 4
- 238000004587 chromatography analysis Methods 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 150000002978 peroxides Chemical class 0.000 description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 229910001415 sodium ion Inorganic materials 0.000 description 4
- 150000003626 triacylglycerols Chemical class 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000003643 water by type Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229920005610 lignin Polymers 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 241000005308 Orsa Species 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229930182558 Sterol Natural products 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000007605 air drying Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 229920006317 cationic polymer Polymers 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 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 2
- 238000001035 drying Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 229910052901 montmorillonite Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052615 phyllosilicate Inorganic materials 0.000 description 2
- 229910001414 potassium ion Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 229910021647 smectite Inorganic materials 0.000 description 2
- 239000002594 sorbent Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 150000003432 sterols Chemical class 0.000 description 2
- 235000003702 sterols Nutrition 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 239000004826 Synthetic adhesive Substances 0.000 description 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000227 bioadhesive Substances 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000009300 dissolved air flotation Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000000705 flame atomic absorption spectrometry Methods 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 238000000527 sonication Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 239000010875 treated wood Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- 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
Definitions
- the present invention relates to the use of specific bentonites having a high cation exchange capacity in the binding or removal of impurities in papermaking.
- Disturbance removal or binding in papermaking is becoming increasingly important.
- the problem is also based on the fact that the paper obtained in the production of water is recycled, with impurities gradually accumulate in it.
- These contaminants can thus lead to a variety of product disruptions, such as the formation of deposits on the rolls of the paper machine, for gluing the screens, etc.
- These effects lead to interruptions in paper production.
- humic acids for example, humic acids, tree resin colloids, lingin derivatives, lignin sulfonates, which are introduced from the fibers into the paper cycle.
- anionic impurities which are introduced into the paper machine by recycling paper broke. This paper break is typically redispersed and introduced into the paper machine. As a result, the ingredients and aids contained in it are completely recycled.
- carboxymethylcelluloses, polyacrylates, polyphosphonates and silicates are registered.
- Other anionic charged impurities are the latices used in the paper coating which, while typically hydrophobic, also carry anionic charges. These strongly tend to agglomerate, whereby the agglomerates are deposited as sticky, white residues on the paper machine (so-called white pitch).
- US 4,964,955 also describes a method for reducing the impurities in papermaking.
- a particulate composition containing (a) a water-soluble cationic polymer coated on (b) a substantially water-insoluble particulate substrate is used.
- the polymer should be sufficiently electropositive so that the particulate composition has a zeta potential of at least about +30 mV.
- the polymer is preferably a poly (dialkyldialylammonium halide).
- the substrate is, for example, a phyllosilicate mineral.
- EP 0 760 406 A2 relates to a combination of a poly (dadmac / acrylamide) and a bentonite in impurity bonding.
- GB 2 297 334 A again discloses the use of a smectite clay for impurity control wherein the smectite clay is modified as follows: monovalent exchangeable cations are present in an equivalent ion content in the range of 0.20 to 0.60 ; a first type of bivalent exchangeable cations is present in an equivalent ion content in the range of 0.40 to 0.80; and a second type of bivalent exchangeable cations is present in an equivalent ion content in the range of 0.00 to 0.20, the first type of bivalent exchangeable cations comprising calcium and the second type of bivalent exchangeable cations comprising magnesium.
- An object of the present invention was therefore to provide an improved process for impurity binding in papermaking, in which a simple and inexpensive to produce means can be used and which allows a high degree of impurity binding, even of hydrophobic proportions.
- this object is achieved by the method according to claim 1.
- impurities include both sticky substances, also referred to in the literature as “adhesives” or “stickies”, and the so-called “pitch”. primarily tree resin components, understood. Here you can refer to the explanations given in the introduction to the impurities. A detailed listing of the “pitch” and “stickies” ingredients may be found, for example, in WO 01/71092 on pages 1 and 2, and the disclosure thereof is hereby expressly incorporated by reference into the present specification.
- the impurities are therefore primarily anionic (negatively charged) or hydrophobic.
- the highly activated bentonites used according to the invention with high CEC can bind both anionic and hydrophobic contaminant fractions very well and neutralize their harmful effect.
- Bentonites themselves have a relatively high negative layer charge and then provide this high (negative) surface charge in the delaminated form of the pulp. This would not expect a good impurity binding for anionic or hydrophobic impurities. It would also be expected that a calcium bentonite would better bind such impurities because a majority of the charges of the bentonites are saturated by the calcium ions and these are e.g. could immobilize impurities via soap formation and fatty acids in tree resin.
- the stickies such as tree resin particles contain many rather non-polar (hydrophobic) components, e.g. Triglycerides. These should be particularly well suited to non-polar surfaces, such as e.g. which bind by talc. Talc has no surface charges and is therefore described in the prior art as optimal for the binding of (hydrophobic) impurities.
- paper pulp and pulp suspension should generally include all the pulp-containing compositions or streams used in papermaking. Otherwise, the terms "pulp” and “pulp suspension” are familiar to those skilled in the art and need not be explained in detail here.
- the pulp or pulp suspension is a wood (fine) slurry-containing suspension.
- wood pulp is concerned _
- the wood pulp suspension is either used directly after comminution or subjected to peroxide bleaching, in which case so-called peroxide-bleached wood pulp is produced.
- peroxide-bleached wood pulp is produced.
- the bentonite used in accordance with the invention shows particularly good results in wood pulp or peroxide-treated pulp-containing paper grades.
- the inventive method can also be used advantageously in other types of paper.
- the pulp or pulp suspension (besides the wood pulp) also contain highly purified fiber fractions, as e.g. so-called news print paper is the case.
- the invention further provides very good results in so-called "deinked powder" (DIP substance). It is a pulp made from waste paper.
- hydrophobic stickies from the glue of magazines and newspapers. These, too, can easily be incorporated into the end product using the bentonite used according to the invention.
- paper stocks in which the bentonite according to the invention can be advantageously used include TMP (Thermo Mechanical Pulp), sulphate pulp, sulphite pulp and mixtures of different pulps. Depending on the paper type and location of the paper mill, such pulps are mixed in different proportions and adapted to the material requirements of the final product.
- the preferred wood pulp content in the paper pulp or pulp suspension according to an advantageous embodiment of the invention is at least 10 wt .-%; in particular at least 30% by weight, in each case based on the dry weight of the entire pulp or suspension.
- the bentonite in the process of the present invention is likely to act without the invention being limited to the accuracy of this assumption by binding or interacting with the contaminants and thus preventing aggregation and deposition on the parts of the paper machine, such as e.g. the rollers, counteracts.
- the bentonite used has a cation exchange capacity (CEC) of at least 85 meq / 100 g, preferably at least 90 meq / 100 g, in particular at least 95 meq / 100 g.
- CEC cation exchange capacity
- CEC cation exchange capacity
- the cation exchange capacity thus includes, for example, the sum of all exchangeable divalent and monovalent cations, such as calcium, magnesium, sodium, lithium and potassium ions.
- the bentonite is treated with an ammonium chloride solution. Due to the high affinity of the ammonium ions for bentonite, virtually all exchangeable cations are exchanged for ammonium ions. After separation and washing, the nitrogen content of the bentonite is determined and from this the content of ammonium ions is calculated.
- Alkali carbonate e.g. Sodium carbonate are treated.
- the contacting can take place in any manner known to the person skilled in the art, e.g. by preparing a solid mixture, a suspension with the layered silicate and the sodium carbonate or by spraying the layered silicate with a solution of the sodium carbonate.
- a calcium-containing crude bentonite having a water content of about 25 to 40% by weight is kneaded with solid sodium carbonate, dried and ground.
- the crude bentonite is pre-crushed to pieces less than 3 cm in diameter. If the crude bentonite does not have the specified water content, this is adjusted by spraying with water.
- the activation can, for example, also be carried out as follows: 350 g of crude bentonite having a water content of about 30 to 35% by weight are introduced into a mixing device (eg a Werner & Pfleiderer mixer (kneader)) and kneaded for 1 minute. Then, while continuing to run the mixer, the amount of sodium carbonate (soda) corresponding to the difference between CEC and sodium content of the bentonite is further kneaded for 10 minutes. The amounts added are based on the anhydrous bentonite. If necessary, some distilled water is added, so that the plasticine "sheared" well. The plasticine is then crushed into small pieces and dried in a circulating air drying cabinet at about 75 ° C.
- a mixing device eg a Werner & Pfleiderer mixer (kneader)
- kneader Werner & Pfleidererer mixer
- More soda can be used than stoichiometrically required for complete activation of the bentonite.
- the specified proportion of monovalent cations refers to the proportion of sodium, potassium and lithium ions, in particular the sodium ions.
- the bentonite used has a swelling capacity of at least 25 ml / 2 g, in particular of at least 30 ml / 2 g, more preferably at least 35 ml / 2 g.
- the swelling volume is determined as follows: A calibrated 100 ml graduated cylinder is distilled with 100 ml. Filled with water. 2.0 g of the substance to be measured are added slowly in portions of 0, 1 to 0.2 g on the water surface. After lowering the material, the next quantum is abandoned. After completion of the addition, wait for 1 hour and then read the volume of the swollen substance in ml / 2g.
- the proportion of iron ions at the CEC should preferably be below about 0.005 (0.5%). It has been found that such bentonites provide better results in terms of the degree of whiteness of the pulp.
- the proportion of monovalent cations in the CEC of the bentonite is more than 0.7, in particular more than 0.8, preferably more than 0.81, more preferably more than 0.85. It is furthermore preferred that the proportion of calcium and / or magnesium ions in the CEC of the bentonite is less than 0.2, in particular less than 0.18, preferably less than 0.15. - 0 -
- the BET surface area (determined according to DIN 66131) of the bentonites used is less than 100 m 2 / g, in particular less than 90 m 2 / g. It is surprising that bentonites with a relatively low specific BET surface area show a particularly advantageous contaminant binding in comparison to bentonites, which can provide a higher specific surface area for contaminant adsorption.
- the concentration of impurities in papermaking is typically determined in the white water by the three common methods cation (s) required (cationic charge demand), turbidity measurement and chemical oxygen demand.
- cation demand it is assumed that the contaminants are all negatively charged and the white water is filtered in short-chain cationic polyelectrolytes. Consumption is converted into the so-called cation requirement.
- turbidity measurement it is assumed that the contaminants are partly colloidal and their concentration can be determined by the extinction caused by the turbidity.
- chemical oxygen demand the amount of organic compounds present is tested via an oxidizing agent.
- bentonite used according to the invention can take place at any point in the papermaking industry suitable for the person skilled in the art. Especially recommended is the addition directly in the pulper, because there is the possibility of a long contact time to the pulp, and the likelihood of a high level of impurity binding is given. Further additions are in the _
- the papermaking apparatuses used in each case will also have an already existing addition point for additives, e.g. in the form of a dosing device or dosing pump, which can be used for the addition of the bentonite used according to the invention.
- the bentonite can be used both in powder form, as well as in the form of a suspension or slurry.
- the suspension or slurry will in many cases allow for better meterability and is easier to automate in large-scale, continuous processes.
- the particle size of the bentonite is selected such that the wet sieve residue is 45 ⁇ m less than 2% by weight, preferably less than 1% by weight, in particular less than 0.5% by weight.
- the determination of Nasssiebrückstands is explained in more detail before the examples.
- the preferred particle size can also be determined by the light scattering method (Malvern).
- the mean particle size (D50) (based on the sample volume) is between 0.5 and 10 ⁇ m, in particular between 2 and 6 ⁇ m, particularly preferably between 3 and 5 ⁇ m.
- bentonite used in the process according to the invention can be routinely determined by the person skilled in the art on the basis of empirical experiments. In most cases amounts are between 0.5 and 12 kg / t paper pulp or pulp suspension, preferably between 1 and 8 kg / t, in particular between 1.5 and 7 kg / t, in each case based on the anhydrous pulp / suspension (dry weight ), be beneficial.
- the process according to the invention not only enables a very good binding of anionic impurity fractions, such as fatty acids, but also outstanding binding or elimination of hydrophobic impurity fractions, such as sterols, steryl esters and triglycerides.
- anionic impurity fractions such as fatty acids
- hydrophobic impurity fractions such as sterols, steryl esters and triglycerides.
- Another aspect of the present invention relates to the use of a bentonite as described herein for impurity binding in papermaking.
- the bentonite is preferably used in a paper pulp or pulp suspension containing wood pulp.
- all types of paper or pulp are included in the use according to the invention.
- Particularly preferred are the above-mentioned types of paper such as groundwood or peroxide-treated wood pulp containing paper types, those (in addition to the groundwood) also contain highly purified fiber fractions, as is the case for example in so-called news print paper, so-called “Deinked PuIp" (DIP-substance) , TMP (Thermo Mechanical Pulp), sulphate pulp, sulphite pulp and mixtures of different pulps.
- DIP-substance so-called "Deinked PuIp"
- TMP Thermo Mechanical Pulp
- sulphate pulp sulphite pulp and mixtures of different pulps.
- Nessler's reagent (Merck, item No. 9028); Boric acid solution, 2%; Caustic soda, 32%; 0.1 N hydrochloric acid; NaCl solution, 0.1%; KCl solution, 0.1%
- Detection of the ionic freedom of the wash water is performed on NH 4 + ions with the sensitive Nessler's reagent.
- the washing rate can vary between 30 minutes and 3 days depending on the key.
- the washed out NH 4 + bentonite is removed from the filter, dried at HO 0 C for 2 hours, ground, sieved (63 micron sieve) and dried again at 110 0 C for 2 h. Thereafter, the NH 4 + content of the bentonite is determined according to Kjeldahl.
- the CEC of the clay is the Kjeldahl NH 4 + content of the NH 4 + bentonite (CEC of some clay minerals, see Appendix). The data are given in mval / 100 g clay (meq / 100g).
- the cations released by the exchange are in the wash water (filtrate).
- the proportion and the type of monovalent cations ("exchangeable cations") was determined spectroscopically in the filtrate according to DIN 38406, part 22.
- the washing water (filtrate) is concentrated for AAS determination, transferred to a 250 ml volumetric flask and filled up with demineralised water up to the measuring mark. Suitable measuring conditions for FAAS can be found in the following tables. - -
- overactivated bentonites ie those which have been activated with a greater than stoichiometric amount of, for example, soda
- the sum of the determined amounts of monovalent cations can exceed the CEC determined as indicated above.
- the total monovalent cation content Li, K, Na is considered to be 100% of the CEC.
- Instruments Analytical balance, plastic cup, Pendraulik LD 50; Sieve: 200 mm diameter, mesh size 0.025 (25 ⁇ m), 0.045 mm (45 ⁇ m), 0.053 mm (53 ⁇ m) or 0.063 mm (63 ⁇ m); Ultrasonic bath.
- the selected stock (eg 45% pulp and 55% peroxide bleached wood pulp) can either be obtained directly from the paper mill or stored in the refrigerator before use.
- the stock was then shaken well at 20g dry to 2% with warm deionized water in a 2000ml beaker. While stirring at 400 rpm, the paper stock batch heated using a hot plate at 40 0 C. If the temperature is reached, the sorbent added to test amount of adsorption with the aid of a Pasteur pipette to the stock approach. Subsequently, the adsorption time in the batch is fixed at 40 ° C. for 30 min and the mixture is stirred at 400 rpm for a while. Thereafter, the paper stock batch is mixed with the adhesive _
- FIG. 1 shows a graph of the dependence of the concentration of the contaminant particles in the white water (filtrate water) on the type and amount of adsorbent used (bentonite or talcum).
- the wet sieve residue (45 ⁇ m) was less than 0.5% by weight.
- Bentonite 2 was obtained from bentonite 1 by kneading bentonite 1 with 5% by weight soda based on the anhydrous bentonite according to the above method, dried to a water content of 10% by weight and then to a corresponding particle size such as bentonite 1 (comparison Table 2) was milled. As a result of these processing steps, the mineralogical data of the bentonite are not changed, so that the montmorillonite content and the content of accompanying minerals remain unchanged.
- the BET surface area was 85 + 2 m 2 / g.
- the content of fatty acids, lignins, sterols, steryl esters and triglycerides for the above samples was determined by gas chromatographic analysis (see method section). Bentonites 1 and 2 were used with 6 kg / t paper (dry weight); the cationized talc was used at 11.25 kg / t paper as 6 kg / t gave poor results. The values obtained are shown in Table 4.
- cationized talc treated as well as the non-inventive calcium bentonite (bentonite 1) treated sample significantly better binding / removal of fatty acids, lignins, styrenes, styryl esters and triglycerides.
- the bentonite of the present invention was compared to conventional bentonites which had at least 0.7 (70%) monovalent cations at the CEC, but a CEC of less than 85 meq / 100g.
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Abstract
Description
Claims
Priority Applications (1)
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PL05826382T PL1825056T3 (en) | 2004-12-16 | 2005-11-30 | Bentonite for binding impurities during paper production |
Applications Claiming Priority (2)
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DE102004060587A DE102004060587A1 (en) | 2004-12-16 | 2004-12-16 | Bentonites for impurity binding in papermaking |
PCT/EP2005/012775 WO2006063682A2 (en) | 2004-12-16 | 2005-11-30 | Bentonite for binding impurities during paper production |
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EP1825056A2 true EP1825056A2 (en) | 2007-08-29 |
EP1825056B1 EP1825056B1 (en) | 2015-01-14 |
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EP05826382.3A Active EP1825056B1 (en) | 2004-12-16 | 2005-11-30 | Bentonite for binding impurities during paper production |
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US (1) | US20090044921A1 (en) |
EP (1) | EP1825056B1 (en) |
JP (1) | JP2008524451A (en) |
KR (1) | KR20070089805A (en) |
BR (1) | BRPI0515785A (en) |
DE (1) | DE102004060587A1 (en) |
ES (1) | ES2531071T3 (en) |
MX (1) | MX2007006952A (en) |
PL (1) | PL1825056T3 (en) |
PT (1) | PT1825056E (en) |
WO (1) | WO2006063682A2 (en) |
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JP4868282B2 (en) * | 2006-09-15 | 2012-02-01 | 星光Pmc株式会社 | Dirt prevention method |
EP1920829A1 (en) | 2006-11-07 | 2008-05-14 | Süd-Chemie Ag | Amorphous adsorbent, method of obtaining the same and its use in the bleaching of fats and/or oils |
MX2009004868A (en) * | 2006-11-07 | 2009-12-14 | Sued Chemie Ag | Method for purification of biodiesel. |
EP1927397A1 (en) | 2006-11-13 | 2008-06-04 | Süd-Chemie Ag | Absorbent composition for surface treatment |
WO2010070682A1 (en) * | 2008-12-15 | 2010-06-24 | Imi Fabi S.P.A. | Talc- and/or chlorite-based compositions and use thereof in controlling pollutants in papermaking industry processes |
EP3128073A1 (en) | 2015-08-06 | 2017-02-08 | Clariant International Ltd | Composite material for combating impurities in the manufacture of paper |
EP3260597B1 (en) | 2016-06-22 | 2019-06-05 | Buchmann Gesellschaft mit beschränkter Haftung | Multi-layer fibre product with an inhibited migration rate of aromatic or saturated hydrocarbons and method for producing the same |
CN115109451B (en) * | 2022-06-17 | 2023-08-18 | 阳原县仁恒精细粘土有限责任公司 | Water-based emulsion paint containing high-expansibility bentonite |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3541163A1 (en) * | 1985-11-21 | 1987-05-27 | Basf Ag | METHOD FOR PRODUCING PAPER AND CARDBOARD |
GB8602121D0 (en) * | 1986-01-29 | 1986-03-05 | Allied Colloids Ltd | Paper & paper board |
US4913775A (en) * | 1986-01-29 | 1990-04-03 | Allied Colloids Ltd. | Production of paper and paper board |
GB8628807D0 (en) * | 1986-12-02 | 1987-01-07 | Ecc Int Ltd | Clay composition |
US4964955A (en) * | 1988-12-21 | 1990-10-23 | Cyprus Mines Corporation | Method of reducing pitch in pulping and papermaking operations |
GB8828899D0 (en) * | 1988-12-10 | 1989-01-18 | Laporte Industries Ltd | Paper & paperboard |
US5032227A (en) * | 1990-07-03 | 1991-07-16 | Vinings Industries Inc. | Production of paper or paperboard |
GB9127173D0 (en) * | 1991-12-21 | 1992-02-19 | Vinings Ind Inc | Method for controlling pitch |
US5368692A (en) * | 1992-01-22 | 1994-11-29 | Vinings Industries Inc. | Method for controlling pitch |
DE69219888T2 (en) * | 1992-07-02 | 1997-09-11 | Ecc Int Ltd | Resin control process in papermaking |
JPH0665892A (en) * | 1992-08-19 | 1994-03-08 | Mizusawa Ind Chem Ltd | Pitch adsorbent |
GB2297334A (en) * | 1995-01-25 | 1996-07-31 | Ecc Int Ltd | Agent for controlling the deposition of pitch in papermaking |
GB9604950D0 (en) * | 1996-03-08 | 1996-05-08 | Allied Colloids Ltd | Clay compositions and their use in paper making |
US5798023A (en) * | 1996-05-14 | 1998-08-25 | Nalco Chemical Company | Combination of talc-bentonite for deposition control in papermaking processes |
DE19627553A1 (en) * | 1996-07-09 | 1998-01-15 | Basf Ag | Process for the production of paper and cardboard |
JPH10194726A (en) * | 1997-01-09 | 1998-07-28 | Mizusawa Ind Chem Ltd | High-concentration bentonite aqueous slurry excellent in long-term storage, its application and use thereof |
EP1492924A2 (en) * | 2002-04-08 | 2005-01-05 | Ciba Specialty Chemicals Water Treatments Limited | White pitch deposit treatment |
-
2004
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2005
- 2005-11-30 PL PL05826382T patent/PL1825056T3/en unknown
- 2005-11-30 BR BRPI0515785-4A patent/BRPI0515785A/en not_active Application Discontinuation
- 2005-11-30 EP EP05826382.3A patent/EP1825056B1/en active Active
- 2005-11-30 ES ES05826382T patent/ES2531071T3/en active Active
- 2005-11-30 US US11/721,229 patent/US20090044921A1/en not_active Abandoned
- 2005-11-30 JP JP2007545875A patent/JP2008524451A/en not_active Ceased
- 2005-11-30 PT PT58263823T patent/PT1825056E/en unknown
- 2005-11-30 KR KR1020077013518A patent/KR20070089805A/en not_active Application Discontinuation
- 2005-11-30 MX MX2007006952A patent/MX2007006952A/en unknown
- 2005-11-30 WO PCT/EP2005/012775 patent/WO2006063682A2/en active Application Filing
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US20090044921A1 (en) | 2009-02-19 |
PL1825056T3 (en) | 2015-07-31 |
JP2008524451A (en) | 2008-07-10 |
MX2007006952A (en) | 2007-06-25 |
WO2006063682A2 (en) | 2006-06-22 |
DE102004060587A1 (en) | 2006-07-06 |
EP1825056B1 (en) | 2015-01-14 |
BRPI0515785A (en) | 2008-08-05 |
WO2006063682A3 (en) | 2007-01-25 |
PT1825056E (en) | 2015-04-08 |
ES2531071T3 (en) | 2015-03-10 |
KR20070089805A (en) | 2007-09-03 |
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