BR9901292A - Method for controlling cellulose pulp bleaching process. - Google Patents

Method for controlling cellulose pulp bleaching process.

Info

Publication number
BR9901292A
BR9901292A BR9901292-8A BR9901292A BR9901292A BR 9901292 A BR9901292 A BR 9901292A BR 9901292 A BR9901292 A BR 9901292A BR 9901292 A BR9901292 A BR 9901292A
Authority
BR
Brazil
Prior art keywords
pulp
amount
cellulose pulp
sample
bleaching process
Prior art date
Application number
BR9901292-8A
Other languages
Portuguese (pt)
Inventor
Damaris Emilia Doro Lorenzoni
Original Assignee
Aracruz Celulose
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 Aracruz Celulose filed Critical Aracruz Celulose
Priority to BR9901292-8A priority Critical patent/BR9901292A/en
Publication of BR9901292A publication Critical patent/BR9901292A/en
Priority to PCT/BR2000/000037 priority patent/WO2000065147A1/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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1052—Controlling the process
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01Q—SCANNING-PROBE TECHNIQUES OR APPARATUS; APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING PROBE MICROSCOPY [SPM]
    • G01Q60/00—Particular types of SPM [Scanning Probe Microscopy] or microscopes; Essential components thereof
    • G01Q60/24—AFM [Atomic Force Microscopy] or apparatus therefor, e.g. AFM probes

Landscapes

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

Abstract

Patente de Invenção: <B>"MéTODO PARA CONTROLE DE PROCESSO DE BRANQUEAMENTO DE POLPA CELULóSICA"<D>. A presente invenção refere-se a um método para controle da quantidade de lingnina presente em polpa celulósica e da quantidade de compostos químicos adicionados à referida polpa durante a etapa de branqueamento, compreendendo submeter uma amostra uma amostra da referida polpa retirada diretamente a partir da carga de polpa da linha de branaqueamento a uma análise de Microscopia de Força Atómica (MFA), computar os dados de sinal de fase resultantes para calcular o teor de lignina na polpa e finalmente determinar a quantidade dos compostos químicos a ser adicioada à polpa em função do teor de lignina calculado.Invention Patent: <B> "METHOD FOR CONTROL OF CELLULOSIC PULP WHITENING PROCESS" <D>. The present invention relates to a method for controlling the amount of lingnin present in cellulose pulp and the amount of chemical compounds added to said pulp during the bleaching step, comprising submitting a sample to a sample of said pulp taken directly from the filler pulp from the bleaching line to an Atomic Force Microscopy (MFA) analysis, compute the resulting phase signal data to calculate the lignin content in the pulp and finally determine the amount of chemical compounds to be added to the pulp as a function of calculated lignin content.

BR9901292-8A 1999-04-27 1999-04-27 Method for controlling cellulose pulp bleaching process. BR9901292A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BR9901292-8A BR9901292A (en) 1999-04-27 1999-04-27 Method for controlling cellulose pulp bleaching process.
PCT/BR2000/000037 WO2000065147A1 (en) 1999-04-27 2000-04-27 A method for controlling a process for bleaching cellulose pulp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BR9901292-8A BR9901292A (en) 1999-04-27 1999-04-27 Method for controlling cellulose pulp bleaching process.

Publications (1)

Publication Number Publication Date
BR9901292A true BR9901292A (en) 2000-01-04

Family

ID=4072227

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9901292-8A BR9901292A (en) 1999-04-27 1999-04-27 Method for controlling cellulose pulp bleaching process.

Country Status (2)

Country Link
BR (1) BR9901292A (en)
WO (1) WO2000065147A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20012009A (en) * 2001-10-16 2003-04-17 Metso Paper Automation Oy Method and apparatus for controlling a chemical dose at the treatment stage of the pulp
US10400392B2 (en) 2015-10-05 2019-09-03 Valmet Automation Oy Measurement apparatus and method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5486915A (en) * 1994-04-12 1996-01-23 The Babcock & Wilcox Company On-line measurement of lignin in wood pulp by color shift of fluorescence

Also Published As

Publication number Publication date
WO2000065147A1 (en) 2000-11-02

Similar Documents

Publication Publication Date Title
Willför et al. Polysaccharides in some industrially important hardwood species
FI974297A (en) Filler used in papermaking and process for its manufacture
BR9810257A (en) Modified cellulosic fibers and fibrous fabrics containing these fibers
NO301894B1 (en) Method of making paper
BRPI0613271A2 (en) method for producing a modified pulp, absorbent toiletries, modified bleached kraft pulp and paper or cardboard
BRPI0512491A (en) method to reduce scale formation in a digester and digester to convert wood chips into pulp for papermaking
Liu et al. Extracting hemicelluloses prior to aspen chemi-thermomechanical pulping: Effects of pre-extraction on pulp properties
BR9901292A (en) Method for controlling cellulose pulp bleaching process.
Danielsson Xylan reactions in kraft cooking: process and product considerations
Pan Relationship between dissolution of fiber materials and development of pulp strength in alkaline peroxide bleaching of mechanical pulp
BR9908832A (en) Process to improve delignification and / or brightening during bleaching of a lignocellulosic pulp
Smith Studies of the mathematical modelling, simulation, and control of the operation of a Kamyr continuous digester for the kraft process.
Dapia et al. TCF bleaching of hardwood pulps obtained in organic acid media: Production of viscose-grade pulps
Zhang et al. Using an optical brightening agent to boost peroxide bleaching of a spruce thermomechanical pulp
Ban et al. Kraft green liquor pretreatment of softwood chips. 1. Chemical sorption profiles
FI71584C (en) Process for controlling alkaline cellulose boiling.
FI80731B (en) FOERFARANDE FOER STYRNING AV ALKALISK CELLULOSAKOK.
Rantanen et al. Modeling of Kappa number in Downflow Lo-Solids cooking using Gustafson’s model
Ala-Kaila et al. Estimation of pulp yield in industrial oxygen-alkali delignification of softwood kraft pulp
NZ242868A (en) Production of chemithermomechanical pulp involving a preheating of impregnated chips, the impregnating composition comprising borohydride and sulphite and being slightly acid (ph 5-7); impregnating liquid therefor
Ban et al. Insight into the chemical behavior of softwood carbohydrates during high-sulfidity green liquor pretreatment
Kohútová et al. Selected physical parameters of spruce chips vs. alkali consumptions in the impregnation step of kraft pulping
Magnusson From recovery boiler to integration of a textile fiber plant: Combination of mass balance analysis and chemical engineering
Lindström Some factors affecting the amount of residual phase lignin during kraft pulping
Sjodahl et al. Addition of dissolved wood components to improve the delignification rate and pulp yield in hardwood kraft pulping

Legal Events

Date Code Title Description
B07A Technical examination (opinion): publication of technical examination (opinion)
B09B Decision: refusal

Free format text: INDEFIRO O PRESENTE PEDIDO DE PATENTE COMO INVENCAO - DE ACORDO COM O ART 8O DA LPI.