SE456168C - Foerfarande foer ljushetsstabilisering av blekt lignininnehaallande cellulosamassa - Google Patents
Foerfarande foer ljushetsstabilisering av blekt lignininnehaallande cellulosamassaInfo
- Publication number
- SE456168C SE456168C SE8700843A SE8700843A SE456168C SE 456168 C SE456168 C SE 456168C SE 8700843 A SE8700843 A SE 8700843A SE 8700843 A SE8700843 A SE 8700843A SE 456168 C SE456168 C SE 456168C
- Authority
- SE
- Sweden
- Prior art keywords
- pulp
- chemical
- treated
- lignin
- paper
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000006641 stabilisation Effects 0.000 title 1
- 238000011105 stabilization Methods 0.000 title 1
- 239000000126 substance Substances 0.000 claims abstract description 56
- 229920002678 cellulose Polymers 0.000 claims abstract description 18
- 239000001913 cellulose Substances 0.000 claims abstract description 18
- 238000011282 treatment Methods 0.000 claims abstract description 16
- 229920005610 lignin Polymers 0.000 claims abstract description 15
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012279 sodium borohydride Substances 0.000 claims description 31
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 31
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 16
- 239000008139 complexing agent Substances 0.000 claims description 8
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000004061 bleaching Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 5
- 238000004383 yellowing Methods 0.000 abstract description 11
- 238000011221 initial treatment Methods 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 45
- 239000006185 dispersion Substances 0.000 description 14
- 239000000725 suspension Substances 0.000 description 10
- 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 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 8
- 239000003638 chemical reducing agent Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 229960003330 pentetic acid Drugs 0.000 description 8
- 229920001131 Pulp (paper) Polymers 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052586 apatite Inorganic materials 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- DJZHPOJZOWHJPP-UHFFFAOYSA-N magnesium;dioxido(dioxo)tungsten Chemical compound [Mg+2].[O-][W]([O-])(=O)=O DJZHPOJZOWHJPP-UHFFFAOYSA-N 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 239000004593 Epoxy Substances 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
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- RYYXDZDBXNUPOG-UHFFFAOYSA-N 4,5,6,7-tetrahydro-1,3-benzothiazole-2,6-diamine;dihydrochloride Chemical compound Cl.Cl.C1C(N)CCC2=C1SC(N)=N2 RYYXDZDBXNUPOG-UHFFFAOYSA-N 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- YXHKONLOYHBTNS-UHFFFAOYSA-N Diazomethane Chemical compound C=[N+]=[N-] YXHKONLOYHBTNS-UHFFFAOYSA-N 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- PASDCCFISLVPSO-UHFFFAOYSA-N benzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1 PASDCCFISLVPSO-UHFFFAOYSA-N 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
- MOOAHMCRPCTRLV-UHFFFAOYSA-N boron sodium Chemical compound [B].[Na] MOOAHMCRPCTRLV-UHFFFAOYSA-N 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 1
- AIXMJTYHQHQJLU-UHFFFAOYSA-N chembl210858 Chemical compound O1C(CC(=O)OC)CC(C=2C=CC(O)=CC=2)=N1 AIXMJTYHQHQJLU-UHFFFAOYSA-N 0.000 description 1
- FOCAUTSVDIKZOP-UHFFFAOYSA-N chloroacetic acid Chemical compound OC(=O)CCl FOCAUTSVDIKZOP-UHFFFAOYSA-N 0.000 description 1
- 229940106681 chloroacetic acid Drugs 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 1
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 1
- CCGKOQOJPYTBIH-UHFFFAOYSA-N ethenone Chemical compound C=C=O CCGKOQOJPYTBIH-UHFFFAOYSA-N 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- NXHILIPIEUBEPD-UHFFFAOYSA-H tungsten hexafluoride Chemical compound F[W](F)(F)(F)(F)F NXHILIPIEUBEPD-UHFFFAOYSA-H 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- D21C9/1026—Other features in bleaching processes
- D21C9/1047—Conserving the bleached pulp
-
- 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
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/20—Chemically or biochemically modified fibres
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Luminescent Compositions (AREA)
- Pens And Brushes (AREA)
- Compounds Of Unknown Constitution (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Artificial Filaments (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Priority Applications (14)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8700843A SE456168C (sv) | 1987-02-27 | 1987-02-27 | Foerfarande foer ljushetsstabilisering av blekt lignininnehaallande cellulosamassa |
| NZ223568A NZ223568A (en) | 1987-02-27 | 1988-02-19 | A method for stabilising the brightness of bleached lignin-containing cellulose pulp |
| JP63043272A JPH07111034B2 (ja) | 1987-02-27 | 1988-02-25 | 漂白したリグニン含有セルロ−スパルプの白色度の安定化方法 |
| FI880880A FI88525C (fi) | 1987-02-27 | 1988-02-25 | Foerfarande foer ljushetsstabiliserande av blekt lignininnehaollande cellulosamassa |
| AU12195/88A AU592488B2 (en) | 1987-02-27 | 1988-02-25 | A method for stabilising the brightness of bleached lignin containing cellulose pulp |
| ES198888102931T ES2025717T3 (es) | 1987-02-27 | 1988-02-26 | Un metodo para estabilizar el brillo de pasta de celulosa blanqueada que contiene lignina. |
| BR8800825A BR8800825A (pt) | 1987-02-27 | 1988-02-26 | Processo para tratar polpa de celulose contendo lignina alvejada |
| AT88102931T ATE69075T1 (de) | 1987-02-27 | 1988-02-26 | Verfahren zur stabilisierung der helligkeit eines gebleichten, lignin enthaltenden halbstoffes. |
| PT86853A PT86853B (pt) | 1987-02-27 | 1988-02-26 | Processo para a estabilizacao do brilho de polpa de celulose branqueada que contem lenhina |
| DE8888102931T DE3865857D1 (de) | 1987-02-27 | 1988-02-26 | Verfahren zur stabilisierung der helligkeit eines gebleichten, lignin enthaltenden halbstoffes. |
| EP88102931A EP0280332B1 (en) | 1987-02-27 | 1988-02-26 | A method for stabilizing the brightness of bleached lignin containing cellulose pulp |
| NO880853A NO167160C (no) | 1987-02-27 | 1988-02-26 | Fremgangsmaate for lyshetsstabilisering av bleket ligninholdig cellulosemasse. |
| CA000560133A CA1289306C (en) | 1987-02-27 | 1988-02-29 | Method for stabilizing the brightness of bleached lignin containing cellulose pulp |
| US07/415,394 US5035772A (en) | 1987-02-27 | 1989-09-28 | Method for treating bleached lignin containing cellulose pulp by reducing α-carbonyl and γ-carbonyl groups and converting short-wave quanta to long-wave light quanta |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8700843A SE456168C (sv) | 1987-02-27 | 1987-02-27 | Foerfarande foer ljushetsstabilisering av blekt lignininnehaallande cellulosamassa |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE8700843D0 SE8700843D0 (sv) | 1987-02-27 |
| SE456168B SE456168B (sv) | 1988-09-12 |
| SE456168C true SE456168C (sv) | 1991-08-12 |
Family
ID=20367701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8700843A SE456168C (sv) | 1987-02-27 | 1987-02-27 | Foerfarande foer ljushetsstabilisering av blekt lignininnehaallande cellulosamassa |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US5035772A (fi) |
| EP (1) | EP0280332B1 (fi) |
| JP (1) | JPH07111034B2 (fi) |
| AT (1) | ATE69075T1 (fi) |
| AU (1) | AU592488B2 (fi) |
| BR (1) | BR8800825A (fi) |
| CA (1) | CA1289306C (fi) |
| DE (1) | DE3865857D1 (fi) |
| ES (1) | ES2025717T3 (fi) |
| FI (1) | FI88525C (fi) |
| NO (1) | NO167160C (fi) |
| NZ (1) | NZ223568A (fi) |
| PT (1) | PT86853B (fi) |
| SE (1) | SE456168C (fi) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5080754A (en) * | 1990-07-20 | 1992-01-14 | The Research Foundation Of State University Of Ny | Method for reducing brightness reversion in lignin-containing pulps and article of manufacture thereof |
| US5360515A (en) * | 1993-08-25 | 1994-11-01 | The Research Foundation Of The State University Of New York | Method for reducing thermal and light-induced brightness reversion in lignin-containing pulps |
| EP0899373A1 (en) * | 1997-08-28 | 1999-03-03 | Ciba SC Holding AG | Method of whitening lignin-containing pulp during manufacture |
| US6059927A (en) * | 1997-09-23 | 2000-05-09 | Queen's University At Kingston | Method of reducing brightness reversion and yellowness (B*) of bleached mechanical wood pulps |
| US6423183B1 (en) | 1997-12-24 | 2002-07-23 | Kimberly-Clark Worldwide, Inc. | Paper products and a method for applying a dye to cellulosic fibers |
| DE19945580C5 (de) * | 1999-09-23 | 2007-03-15 | Stora Enso Publication Paper Gmbh & Co. Kg | Gestrichenes, optisch aufgehelltes Druckpapier und Verfahren zu dessen Herstellung |
| US6379498B1 (en) * | 2000-02-28 | 2002-04-30 | Kimberly-Clark Worldwide, Inc. | Method for adding an adsorbable chemical additive to pulp during the pulp processing and products made by said method |
| JP2004504500A (ja) * | 2000-04-19 | 2004-02-12 | パルプ アンド ペーパー リサーチ インスチチュート オブ カナダ | 紙黄変の阻止 |
| US6749721B2 (en) | 2000-12-22 | 2004-06-15 | Kimberly-Clark Worldwide, Inc. | Process for incorporating poorly substantive paper modifying agents into a paper sheet via wet end addition |
| JP4613338B2 (ja) * | 2001-02-06 | 2011-01-19 | 独立行政法人産業技術総合研究所 | セルロース誘導体の漂白法 |
| US7749356B2 (en) | 2001-03-07 | 2010-07-06 | Kimberly-Clark Worldwide, Inc. | Method for using water insoluble chemical additives with pulp and products made by said method |
| US6582560B2 (en) * | 2001-03-07 | 2003-06-24 | Kimberly-Clark Worldwide, Inc. | Method for using water insoluble chemical additives with pulp and products made by said method |
| US6716310B2 (en) | 2001-12-31 | 2004-04-06 | Kimberly-Clark Worldwide, Inc. | Process for manufacturing a cellulosic paper product exhibiting reduced malodor |
| US6893473B2 (en) * | 2002-05-07 | 2005-05-17 | Weyerhaeuser.Company | Whitened fluff pulp |
| US20040000012A1 (en) * | 2002-06-26 | 2004-01-01 | Borregaard Chemcell | Treatment of a mixture containing cellulose |
| US6916402B2 (en) * | 2002-12-23 | 2005-07-12 | Kimberly-Clark Worldwide, Inc. | Process for bonding chemical additives on to substrates containing cellulosic materials and products thereof |
| FI122175B (fi) * | 2003-12-23 | 2011-09-30 | Teknologian Tutkimuskeskus Vtt | Menetelmä kuitutuotteen valmistamiseksi |
| FI20031904A (fi) * | 2003-12-23 | 2005-06-24 | Kemira Oyj | Menetelmä lignoselluloosatuotteen muokkaamiseksi |
| FI121892B (fi) * | 2003-12-23 | 2011-05-31 | Teknologian Tutkimuskeskus Vtt | Menetelmä kuituyhdistelmätuotteiden valmistamiseksi |
| US7670459B2 (en) | 2004-12-29 | 2010-03-02 | Kimberly-Clark Worldwide, Inc. | Soft and durable tissue products containing a softening agent |
| CA2601507C (en) * | 2005-04-08 | 2013-09-03 | Nalco Company | Improved compositions and processes for paper production |
| US8246780B2 (en) * | 2005-09-19 | 2012-08-21 | Nalco Company | Methods for enhancing brightness and resistance to thermal yellowing of bleached kraft pulp and paper |
| US7967948B2 (en) * | 2006-06-02 | 2011-06-28 | International Paper Company | Process for non-chlorine oxidative bleaching of mechanical pulp in the presence of optical brightening agents |
| US8728274B2 (en) * | 2006-09-22 | 2014-05-20 | Akzo Nobel N.V. | Treatment of pulp |
| FI20085347A0 (fi) * | 2008-04-22 | 2008-04-22 | Kemira Oyj | Esikäsittelymenetelmä valon aikaansaaman ligniinipitoisen materiaalin kellertymisen vähentämiseksi |
| FI20085345L (fi) * | 2008-04-22 | 2009-10-23 | Kemira Oyj | Menetelmä valon aikaansaaman ligniinipitoisen materiaalin kellertymisen vähentämiseksi |
| US9932709B2 (en) * | 2013-03-15 | 2018-04-03 | Ecolab Usa Inc. | Processes and compositions for brightness improvement in paper production |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE164828C1 (fi) * | ||||
| SE177179C1 (fi) * | 1961-01-01 | |||
| US3017316A (en) * | 1958-06-25 | 1962-01-16 | Hooker Chemical Corp | Method of bleaching wood pulp with chlorine dioxide and sodium borohydride |
| US3068141A (en) * | 1959-09-10 | 1962-12-11 | Eastman Kodak Co | Method of refining kraft wood pulp |
| DE1121798B (de) * | 1959-10-24 | 1962-01-11 | Norddeutsche Seekabelwerke Ag | Verfahren und Vorrichtung zur Herstellung von Beuteln aus einem Schlauch aus thermoplastischem Kunststoff |
| US3393122A (en) * | 1964-06-03 | 1968-07-16 | Georgia Pacific Corp | Pretreatment of green wood with reducing agent prior to storage |
| GB1495154A (en) * | 1973-12-10 | 1977-12-14 | Commw Scient Ind Res Org | Manufacture of paperboard |
| SU536271A1 (ru) * | 1975-04-01 | 1976-11-25 | Пермский Филиал Всесоюзного Научно-Производственного Объединения Целлюлозно-Бумажной Промышленности | Способ отбелки волокнистой массы |
| US4339238A (en) * | 1980-01-14 | 1982-07-13 | Ciba-Geigy Corporation | Stable aqueous formulations of stilbene fluorescent whitening agents |
| US4401810A (en) * | 1981-09-08 | 1983-08-30 | United States Of America As Represented By The Librarian Of Congress | Method of stabilizing felted cellulosic sheet material with an alkali metal borohydride |
| CA1249402A (en) * | 1984-12-21 | 1989-01-31 | Pulp And Paper Research Institute Of Canada | Multistage brightening of high yield and ultra high- yield wood pulps |
-
1987
- 1987-02-27 SE SE8700843A patent/SE456168C/sv not_active IP Right Cessation
-
1988
- 1988-02-19 NZ NZ223568A patent/NZ223568A/xx unknown
- 1988-02-25 FI FI880880A patent/FI88525C/fi active IP Right Grant
- 1988-02-25 JP JP63043272A patent/JPH07111034B2/ja not_active Expired - Lifetime
- 1988-02-25 AU AU12195/88A patent/AU592488B2/en not_active Expired
- 1988-02-26 BR BR8800825A patent/BR8800825A/pt not_active IP Right Cessation
- 1988-02-26 PT PT86853A patent/PT86853B/pt not_active IP Right Cessation
- 1988-02-26 NO NO880853A patent/NO167160C/no not_active IP Right Cessation
- 1988-02-26 AT AT88102931T patent/ATE69075T1/de not_active IP Right Cessation
- 1988-02-26 EP EP88102931A patent/EP0280332B1/en not_active Expired - Lifetime
- 1988-02-26 DE DE8888102931T patent/DE3865857D1/de not_active Expired - Lifetime
- 1988-02-26 ES ES198888102931T patent/ES2025717T3/es not_active Expired - Lifetime
- 1988-02-29 CA CA000560133A patent/CA1289306C/en not_active Expired - Lifetime
-
1989
- 1989-09-28 US US07/415,394 patent/US5035772A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NO167160C (no) | 1991-10-09 |
| AU1219588A (en) | 1988-09-01 |
| SE8700843D0 (sv) | 1987-02-27 |
| NZ223568A (en) | 1989-06-28 |
| EP0280332B1 (en) | 1991-10-30 |
| AU592488B2 (en) | 1990-01-11 |
| PT86853B (pt) | 1992-05-29 |
| FI88525B (fi) | 1993-02-15 |
| NO167160B (no) | 1991-07-01 |
| BR8800825A (pt) | 1988-10-04 |
| JPH07111034B2 (ja) | 1995-11-29 |
| PT86853A (pt) | 1988-03-01 |
| NO880853D0 (no) | 1988-02-26 |
| NO880853L (no) | 1988-08-29 |
| ATE69075T1 (de) | 1991-11-15 |
| FI880880A (fi) | 1988-08-28 |
| ES2025717T3 (es) | 1992-04-01 |
| CA1289306C (en) | 1991-09-24 |
| FI880880A0 (fi) | 1988-02-25 |
| JPS63227882A (ja) | 1988-09-22 |
| DE3865857D1 (de) | 1991-12-05 |
| US5035772A (en) | 1991-07-30 |
| SE456168B (sv) | 1988-09-12 |
| FI88525C (fi) | 1993-05-25 |
| EP0280332A1 (en) | 1988-08-31 |
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