CA2425197A1 - An improved retention/draining aid comprising a siliceous material and an organic microparticle - Google Patents
An improved retention/draining aid comprising a siliceous material and an organic microparticle Download PDFInfo
- Publication number
- CA2425197A1 CA2425197A1 CA002425197A CA2425197A CA2425197A1 CA 2425197 A1 CA2425197 A1 CA 2425197A1 CA 002425197 A CA002425197 A CA 002425197A CA 2425197 A CA2425197 A CA 2425197A CA 2425197 A1 CA2425197 A1 CA 2425197A1
- Authority
- CA
- Canada
- Prior art keywords
- siliceous material
- suspension
- improved retention
- draining
- organic microparticle
- 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
- 239000000463 material Substances 0.000 title abstract 2
- 230000014759 maintenance of location Effects 0.000 title 1
- 239000011859 microparticle Substances 0.000 title 1
- 239000000725 suspension Substances 0.000 abstract 4
- 238000001035 drying Methods 0.000 abstract 1
- 230000003311 flocculating effect Effects 0.000 abstract 1
- 238000005189 flocculation Methods 0.000 abstract 1
- 230000016615 flocculation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000123 paper Substances 0.000 abstract 1
- 239000011087 paperboard Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 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
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/50—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 form
- D21H21/52—Additives of definite length or shape
-
- 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
- D21H23/76—Processes or apparatus for adding material to the pulp or to the paper characterised by choice of auxiliary compounds which are added separately from at least one other compound, e.g. to improve the incorporation of the latter or to obtain an enhanced combined effect
- D21H23/765—Addition of all compounds to the pulp
Abstract
According to the present invention a process is provided for making paper of paper board comprising forming a cellulosic suspension, flocculating the suspension, draining the suspension on a screen to form a sheet and then drying the sheet, characterised in that the suspension is flocculated using a flocculation system comprising a siliceous material and organic microparticl es which have an unswollen particle diameter of less than 750 nanometers.</SDOA B>
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24063500P | 2000-10-16 | 2000-10-16 | |
US60/240,635 | 2000-10-16 | ||
PCT/EP2001/011454 WO2002033171A1 (en) | 2000-10-16 | 2001-10-04 | Manufacture of paper and paperboard |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2425197A1 true CA2425197A1 (en) | 2002-04-25 |
CA2425197C CA2425197C (en) | 2006-04-25 |
Family
ID=22907320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002425197A Expired - Lifetime CA2425197C (en) | 2000-10-16 | 2001-10-04 | An improved retention/draining aid comprising a siliceous material and an organic microparticle |
Country Status (25)
Country | Link |
---|---|
US (1) | US6524439B2 (en) |
EP (1) | EP1328683B1 (en) |
JP (2) | JP3713018B2 (en) |
KR (1) | KR100697547B1 (en) |
CN (1) | CN1245556C (en) |
AR (1) | AR030995A1 (en) |
AT (1) | ATE312237T1 (en) |
AU (2) | AU2164602A (en) |
BR (1) | BR0114676B1 (en) |
CA (1) | CA2425197C (en) |
CZ (1) | CZ297399B6 (en) |
DE (1) | DE60115692T2 (en) |
DK (1) | DK1328683T3 (en) |
ES (1) | ES2253445T3 (en) |
HU (1) | HU229917B1 (en) |
MX (1) | MXPA03003380A (en) |
MY (1) | MY140287A (en) |
NO (1) | NO333399B1 (en) |
NZ (1) | NZ525113A (en) |
PL (1) | PL205269B1 (en) |
RU (1) | RU2265097C2 (en) |
SK (1) | SK287122B6 (en) |
TW (1) | TWI284166B (en) |
WO (1) | WO2002033171A1 (en) |
ZA (1) | ZA200302614B (en) |
Families Citing this family (56)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7189776B2 (en) * | 2001-06-12 | 2007-03-13 | Akzo Nobel N.V. | Aqueous composition |
DE20220979U1 (en) * | 2002-08-07 | 2004-10-14 | Basf Ag | Preparation of paper, pasteboard, or cardboard involving cutting of the paper pulp, addition of microparticles of cationic polymer, e.g. cationic polyamide, and a finely divided inorganic component after the last cutting step |
AU2003261765A1 (en) * | 2002-08-27 | 2004-03-19 | Kao Corporation | Paper quality improver |
CN1768006B (en) * | 2003-04-02 | 2010-05-26 | 西巴特殊化学水处理有限公司 | Aqueous compositions and their use in the manufacture of paper and paperboard |
NZ542497A (en) * | 2003-04-02 | 2008-10-31 | Ciba Spec Chem Water Treat Ltd | Aqueous compositions comprising a polysilicate and their use in the manufacture of paper and paperboard |
DE10346750A1 (en) * | 2003-10-06 | 2005-04-21 | Basf Ag | Process for the production of paper, cardboard and cardboard |
JP4517662B2 (en) * | 2004-02-10 | 2010-08-04 | 栗田工業株式会社 | Paper and paperboard manufacturing method |
JP4770121B2 (en) * | 2004-03-30 | 2011-09-14 | 栗田工業株式会社 | Paper and paperboard manufacturing method |
FR2869625B1 (en) * | 2004-04-29 | 2007-09-21 | Snf Sas Soc Par Actions Simpli | METHOD FOR MANUFACTURING PAPER AND CARDBOARD, NEW CORRESPONDING RETENTION AND DRAINING AGENTS, AND PAPERS AND CARTONS THUS OBTAINED |
FR2869626A3 (en) * | 2004-04-29 | 2005-11-04 | Snf Sas Soc Par Actions Simpli | METHOD FOR MANUFACTURING PAPER AND CARDBOARD, NEW CORRESPONDING RETENTION AND DRAINING AGENTS, AND PAPERS AND CARTONS THUS OBTAINED |
US7955473B2 (en) | 2004-12-22 | 2011-06-07 | Akzo Nobel N.V. | Process for the production of paper |
US20060142432A1 (en) * | 2004-12-29 | 2006-06-29 | Harrington John C | Retention and drainage in the manufacture of paper |
US20060142430A1 (en) * | 2004-12-29 | 2006-06-29 | Harrington John C | Retention and drainage in the manufacture of paper |
US20060142429A1 (en) * | 2004-12-29 | 2006-06-29 | Gelman Robert A | Retention and drainage in the manufacture of paper |
US8308902B2 (en) | 2004-12-29 | 2012-11-13 | Hercules Incorporated | Retention and drainage in the manufacture of paper |
US20060137843A1 (en) * | 2004-12-29 | 2006-06-29 | Sutman Frank J | Retention and drainage in the manufacture of paper |
US20060142431A1 (en) | 2004-12-29 | 2006-06-29 | Sutman Frank J | Retention and drainage in the manufacture of paper |
KR20070103398A (en) * | 2004-12-29 | 2007-10-23 | 허큘레스 인코포레이티드 | Improved retention and drainage in the manufacture of paper |
AU2006248157B2 (en) * | 2005-05-16 | 2009-10-01 | Akzo Nobel Chemicals International B.V. | A process for the production of paper |
US20060254464A1 (en) * | 2005-05-16 | 2006-11-16 | Akzo Nobel N.V. | Process for the production of paper |
US20060289139A1 (en) * | 2005-06-24 | 2006-12-28 | Fushan Zhang | Retention and drainage in the manufacture of paper |
DE102005043800A1 (en) | 2005-09-13 | 2007-03-22 | Basf Ag | Process for the production of paper, cardboard and cardboard |
US8273216B2 (en) | 2005-12-30 | 2012-09-25 | Akzo Nobel N.V. | Process for the production of paper |
RU2404317C2 (en) * | 2005-12-30 | 2010-11-20 | Акцо Нобель Н.В. | Production method of paper |
US9017649B2 (en) * | 2006-03-27 | 2015-04-28 | Nalco Company | Method of stabilizing silica-containing anionic microparticles in hard water |
WO2007149258A2 (en) * | 2006-06-08 | 2007-12-27 | International Paper Company | Paper substrates containing a silicon-containing compound |
US7981250B2 (en) | 2006-09-14 | 2011-07-19 | Kemira Oyj | Method for paper processing |
JP2010505048A (en) | 2006-09-27 | 2010-02-18 | チバ ホールディング インコーポレーテッド | Siliceous composition and its use in papermaking |
WO2008049748A1 (en) | 2006-10-25 | 2008-05-02 | Ciba Holding Inc. | A process for improving paper strength |
RU2461595C2 (en) * | 2007-02-26 | 2012-09-20 | Акцо Нобель Н.В. | Pigment composition |
DE102007020523A1 (en) * | 2007-05-02 | 2008-11-06 | Helling, Günter, Dr. | Metal salt nanogel-containing polymers |
US8172983B2 (en) * | 2007-09-12 | 2012-05-08 | Nalco Company | Controllable filler prefloculation using a dual polymer system |
US9752283B2 (en) | 2007-09-12 | 2017-09-05 | Ecolab Usa Inc. | Anionic preflocculation of fillers used in papermaking |
US8088250B2 (en) | 2008-11-26 | 2012-01-03 | Nalco Company | Method of increasing filler content in papermaking |
US8382950B2 (en) * | 2007-09-12 | 2013-02-26 | Nalco Company | Recycling of waste coating color |
US8747617B2 (en) | 2007-09-12 | 2014-06-10 | Nalco Company | Controllable filler prefloculation using a dual polymer system |
US8088213B2 (en) * | 2007-09-12 | 2012-01-03 | Nalco Company | Controllable filler prefloculation using a dual polymer system |
US8778140B2 (en) | 2007-09-12 | 2014-07-15 | Nalco Company | Preflocculation of fillers used in papermaking |
FR2929963B1 (en) * | 2008-04-10 | 2010-04-23 | Snf Sas | PROCESS FOR PRODUCING PAPER AND CARDBOARD |
US8394237B2 (en) | 2008-09-02 | 2013-03-12 | BASF SE Ludwigshafen | Method for manufacturing paper, cardboard and paperboard using endo-beta-1,4-glucanases as dewatering means |
AT508256B1 (en) * | 2009-11-13 | 2010-12-15 | Applied Chemicals Handels Gmbh | METHOD FOR PRODUCING PAPER OR DGL. |
BR112012027210A2 (en) | 2010-05-05 | 2016-07-26 | Basf Se | pulp composition for the production of paper or paperboard, paper material, paper or paperboard, process for producing paper or paperboard, and, use |
NZ609491A (en) | 2010-10-29 | 2015-01-30 | Buckman Lab Int Inc | Papermaking and products made thereby with ionic crosslinked polymeric microparticle |
EP2721214B1 (en) * | 2011-06-20 | 2017-02-01 | Basf Se | Manufacture of paper and paperboard |
JP6307439B2 (en) * | 2011-12-15 | 2018-04-04 | インヴェンティア・アクチボラゲットInnventia Ab | Paper and paperboard improvement systems and methods |
ES2663384T3 (en) * | 2012-03-01 | 2018-04-12 | Basf Se | Paper and cardboard manufacturing process |
DE102012012561A1 (en) | 2012-06-25 | 2014-04-24 | Süd-Chemie AG | Process for producing filled paper and cardboard using coacervates |
US10252228B2 (en) | 2012-08-28 | 2019-04-09 | Basf Se | Method and device for feeding at least one chemical substance into a main process stream |
JP2015533953A (en) * | 2012-10-05 | 2015-11-26 | スペシャリティ ミネラルズ (ミシガン) インコーポレイテッド | Filler suspension and its use in the manufacture of paper |
TWI487823B (en) | 2012-11-01 | 2015-06-11 | Nalco Co | Preflocculation of fillers used in papermaking |
FI126610B (en) * | 2015-01-27 | 2017-03-15 | Kemira Oyj | Particulate polymer product and its use |
JP6779976B2 (en) | 2015-08-06 | 2020-11-04 | ビーエーエスエフ ソシエタス・ヨーロピアBasf Se | Paper manufacturing method |
US9873982B2 (en) | 2015-10-12 | 2018-01-23 | Solenis Technologies, L.P. | Method of increasing drainage performance of a pulp slurry during manufacture of paper products, and products therefrom |
CN111386289A (en) * | 2017-09-08 | 2020-07-07 | 索理思科技开曼公司 | Composition comprising crosslinked anionic organic polymeric microparticles, method for preparing same and use in a process for the manufacture of paper and board |
KR102092128B1 (en) | 2019-09-20 | 2020-03-23 | 정현빈 | Retention method for manufacturing industrial paper to improve turbidity of process white water, and retention system |
CN117507485B (en) * | 2024-01-05 | 2024-03-12 | 湖南大道新材料有限公司 | Oxygen-blocking paper bag and preparation method and application thereof |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH594444A5 (en) | 1972-12-04 | 1978-01-13 | Gerd Birrenbach | |
SE432951B (en) | 1980-05-28 | 1984-04-30 | Eka Ab | PAPER PRODUCT CONTAINING CELLULOSA FIBERS AND A BINDING SYSTEM CONTAINING COLOIDAL MILIC ACID AND COTIONIC STARCH AND PROCEDURE FOR PREPARING THE PAPER PRODUCT |
FR2524895A1 (en) | 1982-04-09 | 1983-10-14 | Inst Francais Du Petrole | PROCESS FOR THE PREPARATION OF CONTINUOUS OILY MICROLATEX BY MICRO-EMULSION POLYMERIZATION OF THE WATER TYPE IN OIL OF A WATER SOLUBLE MONOMER, MICROLATEX OBTAINED AND THEIR USE IN ASSISTED OIL RECOVERY |
NO165879C (en) | 1984-06-07 | 1991-04-24 | Inst Francais Du Petrole | PROCEDURE FOR PREPARING AN INVERSE, STABLE MICROLATEKS. |
SE8403062L (en) | 1984-06-07 | 1985-12-08 | Eka Ab | PAPER MANUFACTURING PROCEDURES |
FR2567525B1 (en) | 1984-07-13 | 1987-03-20 | Inst Francais Du Petrole | PROCESS FOR THE PREPARATION OF INVERTED MICROLATEX AND THE INVERTED MICROLATEX OBTAINED |
GB8602121D0 (en) | 1986-01-29 | 1986-03-05 | Allied Colloids Ltd | Paper & paper board |
US4795531A (en) | 1987-09-22 | 1989-01-03 | Nalco Chemical Company | Method for dewatering paper |
US5176891A (en) | 1988-01-13 | 1993-01-05 | Eka Chemicals, Inc. | Polyaluminosilicate process |
EP0335575B2 (en) | 1988-03-28 | 2000-08-23 | Ciba Specialty Chemicals Water Treatments Limited | Production of paper and paper board |
MX18620A (en) | 1988-12-19 | 1993-10-01 | American Cyanamid Co | HIGH PERFORMANCE POLYMERIC FLOCULANT, PROCESS FOR ITS PREPARATION, METHOD FOR THE RELEASE OF WATER FROM A DISPERSION OF SUSPENDED SOLIDS AND FLOCULATION METHOD OF A DISPERSION OF SUSPENDED SOLIDS |
US5274055A (en) * | 1990-06-11 | 1993-12-28 | American Cyanamid Company | Charged organic polymer microbeads in paper-making process |
US5167766A (en) * | 1990-06-18 | 1992-12-01 | American Cyanamid Company | Charged organic polymer microbeads in paper making process |
DE69120374T3 (en) * | 1990-06-11 | 2002-06-06 | Ciba Spec Chem Water Treat Ltd | Cross-linked, anionic and amphoteric polymer microbeads |
GB9024016D0 (en) | 1990-11-05 | 1990-12-19 | Allied Colloids Ltd | Clay compositions,their manufacture and their use in the production of paper |
FR2692292B1 (en) | 1992-06-11 | 1994-12-02 | Snf Sa | Method for manufacturing paper or cardboard with improved retention. |
GB9301451D0 (en) * | 1993-01-26 | 1993-03-17 | Allied Colloids Ltd | Production of filled paper |
US5431783A (en) * | 1993-07-19 | 1995-07-11 | Cytec Technology Corp. | Compositions and methods for improving performance during separation of solids from liquid particulate dispersions |
US5482693A (en) | 1994-03-14 | 1996-01-09 | E. I. Du Pont De Nemours And Company | Process for preparing water soluble polyaluminosilicates |
US5584966A (en) * | 1994-04-18 | 1996-12-17 | E. I. Du Pont De Nemours And Company | Paper formation |
GB9410920D0 (en) * | 1994-06-01 | 1994-07-20 | Allied Colloids Ltd | Manufacture of paper |
SE9504081D0 (en) * | 1995-11-15 | 1995-11-15 | Eka Nobel Ab | A process for the production of paper |
GB9604950D0 (en) | 1996-03-08 | 1996-05-08 | Allied Colloids Ltd | Clay compositions and their use in paper making |
GB9604927D0 (en) | 1996-03-08 | 1996-05-08 | Allied Colloids Ltd | Activation of swelling clays and processes of using the activated clays |
US6007679A (en) * | 1996-05-01 | 1999-12-28 | Nalco Chemical Company | Papermaking process |
ATE215640T1 (en) * | 1996-12-31 | 2002-04-15 | Ciba Spec Chem Water Treat Ltd | PAPER MAKING METHOD AND MATERIALS |
ES2210824T3 (en) | 1997-09-30 | 2004-07-01 | Ondeo Nalco Company | COLOID BOROSILICATES AND ITS USE IN PAPER PRODUCTION. |
TW550325B (en) * | 1999-11-08 | 2003-09-01 | Ciba Spec Chem Water Treat Ltd | Manufacture of paper and paperboard |
-
2001
- 2001-09-27 MY MYPI20014519A patent/MY140287A/en unknown
- 2001-10-04 EP EP01987827A patent/EP1328683B1/en not_active Revoked
- 2001-10-04 CZ CZ20031059A patent/CZ297399B6/en unknown
- 2001-10-04 ES ES01987827T patent/ES2253445T3/en not_active Expired - Lifetime
- 2001-10-04 JP JP2002536137A patent/JP3713018B2/en not_active Expired - Fee Related
- 2001-10-04 MX MXPA03003380A patent/MXPA03003380A/en active IP Right Grant
- 2001-10-04 KR KR1020037005276A patent/KR100697547B1/en active IP Right Grant
- 2001-10-04 WO PCT/EP2001/011454 patent/WO2002033171A1/en active IP Right Grant
- 2001-10-04 BR BRPI0114676-9A patent/BR0114676B1/en not_active IP Right Cessation
- 2001-10-04 NZ NZ525113A patent/NZ525113A/en not_active IP Right Cessation
- 2001-10-04 RU RU2003114747/12A patent/RU2265097C2/en active
- 2001-10-04 HU HU0301435A patent/HU229917B1/en unknown
- 2001-10-04 SK SK459-2003A patent/SK287122B6/en not_active IP Right Cessation
- 2001-10-04 CN CNB01817454XA patent/CN1245556C/en not_active Expired - Lifetime
- 2001-10-04 AT AT01987827T patent/ATE312237T1/en active
- 2001-10-04 DE DE60115692T patent/DE60115692T2/en not_active Expired - Lifetime
- 2001-10-04 PL PL363690A patent/PL205269B1/en unknown
- 2001-10-04 AU AU2164602A patent/AU2164602A/en active Pending
- 2001-10-04 CA CA002425197A patent/CA2425197C/en not_active Expired - Lifetime
- 2001-10-04 DK DK01987827T patent/DK1328683T3/en active
- 2001-10-04 AU AU2002221646A patent/AU2002221646B2/en not_active Expired
- 2001-10-10 US US09/974,930 patent/US6524439B2/en not_active Expired - Lifetime
- 2001-10-12 AR ARP010104805A patent/AR030995A1/en active IP Right Grant
- 2001-10-15 TW TW090125347A patent/TWI284166B/en not_active IP Right Cessation
-
2003
- 2003-04-03 ZA ZA200302614A patent/ZA200302614B/en unknown
- 2003-04-03 NO NO20031518A patent/NO333399B1/en not_active IP Right Cessation
-
2005
- 2005-07-19 JP JP2005208790A patent/JP3987075B2/en not_active Expired - Fee Related
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20211004 |