BR112021025188A2 - Apparatus, methods and systems for producing high-alpha, high-intrinsic-viscosity pulp - Google Patents

Apparatus, methods and systems for producing high-alpha, high-intrinsic-viscosity pulp

Info

Publication number
BR112021025188A2
BR112021025188A2 BR112021025188A BR112021025188A BR112021025188A2 BR 112021025188 A2 BR112021025188 A2 BR 112021025188A2 BR 112021025188 A BR112021025188 A BR 112021025188A BR 112021025188 A BR112021025188 A BR 112021025188A BR 112021025188 A2 BR112021025188 A2 BR 112021025188A2
Authority
BR
Brazil
Prior art keywords
pulp
alpha
systems
methods
intrinsic viscosity
Prior art date
Application number
BR112021025188A
Other languages
Portuguese (pt)
Other versions
BR112021025188A8 (en
Inventor
de Azambuja TURQUETI André
de Oliveira SALAROLI Vinicius
Original Assignee
Bahia Specialty Cellulose S/A
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 Bahia Specialty Cellulose S/A filed Critical Bahia Specialty Cellulose S/A
Publication of BR112021025188A2 publication Critical patent/BR112021025188A2/en
Publication of BR112021025188A8 publication Critical patent/BR112021025188A8/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/02—Pretreatment of the finely-divided materials before digesting with water or steam
    • 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate 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
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp

Abstract

aparelhos, métodos e sistemas de produção de polpa de alta viscosidade intrínseca e alta alfa. os aparelhos, métodos e sistemas de produção de polpa de alta viscosidade intrínseca e alta alfa (doravante no presente documento "produção de polpa de alta-a e alta-iv") revelados, no presente documento, fornecem processamento de polpa usado em conexão com processos kraft (kp) ou processos kraft de pré-hidrólise (phkp), modalidades que empregam um estágio de extração cáustica fria (cce) e/ou estágios de lavagem e clareamento adequados, resultando em uma polpa com alta viscosidade intrínseca (iv) e alta pureza, tal como pode ser determinado pelo teor de celulose alfa, e brilho adequado para o uso a jusante em aplicações tais como celulose regenerada altamente tênsil e aplicações de éter, ou outras aplicações que empregam uma polpa de alta iv com pureza significativa (por exemplo, celulose alfa > 92%).apparatus, methods and systems for producing high alpha and intrinsic viscosity pulp. the high alpha and high intrinsic viscosity pulp production apparatus, methods and systems (hereinafter "high-a and high-iv pulp production") disclosed herein provide for pulp processing used in connection with kraft processes (kp) or kraft pre-hydrolysis processes (phkp), modalities that employ a cold caustic extraction (cce) stage and/or suitable washing and bleaching stages, resulting in a pulp with high intrinsic viscosity (iv) and high purity, as determined by alpha cellulose content, and brightness suitable for downstream use in applications such as highly tensile regenerated cellulose and ether applications, or other applications employing a high iv pulp with significant purity (e.g. example, alpha cellulose > 92%).

BR112021025188A 2019-06-14 2019-06-14 Apparatus, methods and systems for producing high-alpha, high-intrinsic-viscosity pulp BR112021025188A8 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2019/000599 WO2020249992A1 (en) 2019-06-14 2019-06-14 High alpha and high intrinsic viscosity pulp production apparatuses, methods and systems

Publications (2)

Publication Number Publication Date
BR112021025188A2 true BR112021025188A2 (en) 2022-03-03
BR112021025188A8 BR112021025188A8 (en) 2022-03-15

Family

ID=73781154

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112021025188A BR112021025188A8 (en) 2019-06-14 2019-06-14 Apparatus, methods and systems for producing high-alpha, high-intrinsic-viscosity pulp

Country Status (4)

Country Link
EP (1) EP3983605A4 (en)
CN (1) CN114096711B (en)
BR (1) BR112021025188A8 (en)
WO (1) WO2020249992A1 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627630A (en) * 1969-12-04 1971-12-14 Beloit Corp Method of flash drying pulp
FI103898B (en) * 1994-01-24 1999-10-15 Sunds Defibrator Pori Oy A process for producing prehydrolyzed pulp and / or pulp
FI104572B (en) * 1996-05-30 2000-02-29 Kemira Chemicals Oy Chemical pulp bleaching process
JP4192567B2 (en) * 2002-11-19 2008-12-10 日本製紙株式会社 Method for producing high whiteness bleached kraft pulp
AT503610B1 (en) * 2006-05-10 2012-03-15 Chemiefaser Lenzing Ag METHOD FOR PRODUCING A PULP
ES2525263T3 (en) 2010-05-04 2014-12-19 Bahia Specialty Cellulose Sa Procedure and treatment system for paper pulp using cold caustic extraction with reuse of alkaline filtrate
KR20110123184A (en) * 2010-05-06 2011-11-14 바히아 스페셜티 셀룰로스 에스에이 Method and system for high alpha dissolving pulp production
CN102337689B (en) * 2011-09-30 2013-10-16 重庆理文造纸有限公司 Stewing method for preparing bamboo wood dissolving pulp
CA2874901C (en) * 2012-05-28 2020-04-07 Sodra Cell Ab New process and dissolving pulp manufactured by the process
JP6358771B2 (en) * 2012-06-15 2018-07-18 日本製紙株式会社 Method for producing dissolved kraft pulp
CN102888772B (en) * 2012-10-17 2015-01-28 四川永丰纸业股份有限公司 Method for preparing bamboo pulp by replacing cooking sulfate with steaming sulfate

Also Published As

Publication number Publication date
EP3983605A1 (en) 2022-04-20
BR112021025188A8 (en) 2022-03-15
WO2020249992A1 (en) 2020-12-17
CN114096711B (en) 2024-04-19
CN114096711A (en) 2022-02-25
WO2020249992A9 (en) 2021-03-11
EP3983605A4 (en) 2023-01-25

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Legal Events

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B06W Patent application suspended after preliminary examination (for patents with searches from other patent authorities) chapter 6.23 patent gazette]