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BR9901808A - Pulp bleaching process including final stage treatment step with peroxymonosulfuric acid salt - Google Patents

Pulp bleaching process including final stage treatment step with peroxymonosulfuric acid salt

Info

Publication number
BR9901808A
BR9901808A BR9901808-0A BR9901808A BR9901808A BR 9901808 A BR9901808 A BR 9901808A BR 9901808 A BR9901808 A BR 9901808A BR 9901808 A BR9901808 A BR 9901808A
Authority
BR
Brazil
Prior art keywords
pulp
final
stage
acid salt
process including
Prior art date
Application number
BR9901808-0A
Other languages
Portuguese (pt)
Inventor
Rajam P Sundara
Gerhard Arnold
John Dr Kronis
Original Assignee
Degussa
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 Degussa filed Critical Degussa
Publication of BR9901808A publication Critical patent/BR9901808A/en

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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids

Landscapes

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

Abstract

Patente de Invenção: <B>"PROCESSO DE ALVEJAMENTO DE POLPA INCLUINDO ETAPA DE TRATAMENTO DE ESTáGIO FINAL COM SAL DE áCIDO PEROXIMONOSSULFúRICO"<D>. Um processo para alvejamento de polpa lingonocelulósica no qual um estágio de alvejamento final o tratamento de polpa lignocelulósica tendo um brilho com um agente oxidante consistindo, essencialmente, de pelo menos um sal de ácido peroximonossulfúrico, para aumentar o brilho da polpa lignocelulósica pré-alvejada e proporcionar uma polpa mais inteiramente alvejada. A polpa mais inteiramente alvejada não é submetida a operações de brilhamento ou deslignificação posteriores durante o restante do dito processo, subseq³ente ao dito estágio de alvejamento final. O tratamento é conduzido a um pH inicial no começo do dito estágio de alvejamento final em uma faixa de cerca de 7 a cerca de 12 a um pH final no fim do dito estágio de alvejamento final em uma faixa de cerca de 3 a cerca de 9.Invention Patent: <B> "PULP WHITEING PROCESS INCLUDING FINAL STAGE TREATMENT STAGE WITH PEROXIMONOSULFURIC ACID SALT" <D>. A lingonocellulosic pulp bleaching process in which a final bleaching stage is the treatment of lignocellulosic pulp having a shine with an oxidizing agent consisting essentially of at least one salt of peroxymonosulfuric acid, to increase the brightness of the pre-bleached lignocellulosic pulp and provide a more wholly targeted pulp. The pulp that is more fully targeted is not subjected to subsequent shining or delignification operations during the remainder of said process, subsequent to said final bleaching stage. The treatment is conducted at an initial pH at the beginning of said final bleaching stage in a range of about 7 to about 12 to a final pH at the end of said final bleaching stage in a range of about 3 to about 9 .

BR9901808-0A 1998-01-22 1999-01-21 Pulp bleaching process including final stage treatment step with peroxymonosulfuric acid salt BR9901808A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1062498A 1998-01-22 1998-01-22

Publications (1)

Publication Number Publication Date
BR9901808A true BR9901808A (en) 1999-12-07

Family

ID=21746597

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9901808-0A BR9901808A (en) 1998-01-22 1999-01-21 Pulp bleaching process including final stage treatment step with peroxymonosulfuric acid salt

Country Status (4)

Country Link
EP (1) EP0931874A1 (en)
BR (1) BR9901808A (en)
CA (1) CA2258443A1 (en)
NO (1) NO990259L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI117392B (en) * 1999-03-02 2006-09-29 Kemira Oyj Multistage bleaching process for bleaching chemical cellulose pulp
CN110629576B (en) * 2019-08-27 2022-04-12 齐鲁工业大学 Method for preparing dissolving pulp by completely chlorine-free bleaching of poplar sulfate pulp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4404061A (en) * 1981-08-17 1983-09-13 International Paper Company Bleaching of lignocellulosic materials with monopersulfuric acid or its salts
US5091054A (en) * 1989-08-18 1992-02-25 Degussa Corporation Process for bleaching and delignification of lignocellulosic
BE1004974A3 (en) * 1991-06-06 1993-03-09 Interox Internat Sa Method for laundering and pasta delignification paper chemicals and application this method of laundering and the delignification of kraft pulp and pulp asam.
US5411635A (en) * 1993-03-22 1995-05-02 The Research Foundation Of State University Of New York Ozone/peroxymonosulfate process for delignifying a lignocellulosic material
US5656130A (en) * 1995-04-28 1997-08-12 Union Camp Holding, Inc. Ambient temperature pulp bleaching with peroxyacid salts

Also Published As

Publication number Publication date
NO990259D0 (en) 1999-01-21
NO990259L (en) 1999-07-23
CA2258443A1 (en) 1999-07-22
EP0931874A1 (en) 1999-07-28

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
B11Y Definitive dismissal acc. article 33 of ipl - extension of time limit for request of examination expired