WO1999060201A3 - Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps - Google Patents

Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps Download PDF

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Publication number
WO1999060201A3
WO1999060201A3 PCT/US1998/010070 US9810070W WO9960201A3 WO 1999060201 A3 WO1999060201 A3 WO 1999060201A3 US 9810070 W US9810070 W US 9810070W WO 9960201 A3 WO9960201 A3 WO 9960201A3
Authority
WO
WIPO (PCT)
Prior art keywords
peroxide
oxygen
molecular weight
high molecular
brightening
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.)
Ceased
Application number
PCT/US1998/010070
Other languages
French (fr)
Other versions
WO1999060201A2 (en
Inventor
Timothy D Evans
Raymond C Francis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Silicates Ltd
Research Foundation of the State University of New York
Original Assignee
National Silicates Ltd
Research Foundation of the State University of New York
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Silicates Ltd, Research Foundation of the State University of New York filed Critical National Silicates Ltd
Priority to MXPA00011196A priority Critical patent/MXPA00011196A/en
Priority to US09/700,475 priority patent/US6699358B1/en
Priority to AT98922379T priority patent/ATE263268T1/en
Priority to AU74938/98A priority patent/AU7493898A/en
Priority to EP98922379A priority patent/EP1088130B1/en
Priority to PCT/US1998/010070 priority patent/WO1999060201A2/en
Priority to BRPI9815857-0A priority patent/BR9815857B1/en
Priority to DE69822893T priority patent/DE69822893D1/en
Priority to CA002332304A priority patent/CA2332304C/en
Publication of WO1999060201A2 publication Critical patent/WO1999060201A2/en
Publication of WO1999060201A3 publication Critical patent/WO1999060201A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)

Abstract

A composition and method for use in the peroxide, oxygen, or peroxide/oxygen stage of brightening pulps with less than 18 % lignin utilize a megnesium compound in a sodium silicate solution to form a higher percentage of high molecular weight silicates. Such high molecular weight silicates preferentially adsorb transition metal impurities which, if left in solution, would tend to decompose hydrogen peroxide and organic peroxides. Hydrogen peroxide is added to peroxide and peroxide/oxygen stages, while it is generated, along with organic peroxides, during an oxygen stage. Decomposition decreases the amount of peroxide that actually reacts with lignin and generates free radicals that attack the desired product, carbohydrate fibers. The high molecular weight silicates can be formed by using any magnesium compound which dissociates to form Mg(OH)+ cations, which in turn cause a silicate polymerization reaction. The formation of Mg(OH)+ cations from magnesium compounds occurs most realidy over a pH range of at least about 8 and preferably between about 8 and about 12. The magnesium compound is added in an amount to achieve an Mg:SiO¿2? mass ratio of between about 1:46 to about 1:2, and preferably between about 1:15 to about 1:3.
PCT/US1998/010070 1998-05-15 1998-05-15 Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps Ceased WO1999060201A2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
MXPA00011196A MXPA00011196A (en) 1998-05-15 1998-05-15 Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps.
US09/700,475 US6699358B1 (en) 1998-05-15 1998-05-15 Method for brightening chemical pulp with hydrogen peroxide using a magnesium compound in silicate solution
AT98922379T ATE263268T1 (en) 1998-05-15 1998-05-15 PEROXIDES, OXYGEN, AND PEROXIDES/OXYGEN BLEACHING OF PULP AND WASTE PAPER FIBERS
AU74938/98A AU7493898A (en) 1998-05-15 1998-05-15 Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps
EP98922379A EP1088130B1 (en) 1998-05-15 1998-05-15 Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps
PCT/US1998/010070 WO1999060201A2 (en) 1998-05-15 1998-05-15 Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps
BRPI9815857-0A BR9815857B1 (en) 1998-05-15 1998-05-15 combination of additives for use in a pulp rinse stage, and process to brighten a pulp.
DE69822893T DE69822893D1 (en) 1998-05-15 1998-05-15 PEROXIDES, OXYGEN, AND PEROXIDES / OXYGEN BLEACH OF CELLULAR MATERIALS AND WASTE PAPER FIBERS
CA002332304A CA2332304C (en) 1998-05-15 1998-05-15 Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1998/010070 WO1999060201A2 (en) 1998-05-15 1998-05-15 Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps

Publications (2)

Publication Number Publication Date
WO1999060201A2 WO1999060201A2 (en) 1999-11-25
WO1999060201A3 true WO1999060201A3 (en) 2000-08-03

Family

ID=22267079

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/010070 Ceased WO1999060201A2 (en) 1998-05-15 1998-05-15 Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps

Country Status (7)

Country Link
EP (1) EP1088130B1 (en)
AT (1) ATE263268T1 (en)
AU (1) AU7493898A (en)
CA (1) CA2332304C (en)
DE (1) DE69822893D1 (en)
MX (1) MXPA00011196A (en)
WO (1) WO1999060201A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0148712A1 (en) * 1983-12-29 1985-07-17 Elf Atochem S.A. Process for bleaching paper pulps with hydrogen peroxide
US4915785A (en) * 1988-12-23 1990-04-10 C-I-L Inc. Single stage process for bleaching of pulp with an aqueous hydrogen peroxide bleaching composition containing magnesium sulphate and sodium silicate
WO1994010374A1 (en) * 1992-10-26 1994-05-11 Sca-Wifsta-Östrand Ab Method for peroxide bleaching of sulphate pulp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0148712A1 (en) * 1983-12-29 1985-07-17 Elf Atochem S.A. Process for bleaching paper pulps with hydrogen peroxide
US4915785A (en) * 1988-12-23 1990-04-10 C-I-L Inc. Single stage process for bleaching of pulp with an aqueous hydrogen peroxide bleaching composition containing magnesium sulphate and sodium silicate
WO1994010374A1 (en) * 1992-10-26 1994-05-11 Sca-Wifsta-Östrand Ab Method for peroxide bleaching of sulphate pulp

Also Published As

Publication number Publication date
EP1088130B1 (en) 2004-03-31
MXPA00011196A (en) 2003-04-22
AU7493898A (en) 1999-12-06
WO1999060201A2 (en) 1999-11-25
CA2332304C (en) 2005-01-11
CA2332304A1 (en) 1999-11-25
ATE263268T1 (en) 2004-04-15
EP1088130A2 (en) 2001-04-04
DE69822893D1 (en) 2004-05-06

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