AR023894A1 - PAPER PASTE WHITENING PROCEDURE - Google Patents

PAPER PASTE WHITENING PROCEDURE

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Publication number
AR023894A1
AR023894A1 ARP000102232A AR023894A1 AR 023894 A1 AR023894 A1 AR 023894A1 AR P000102232 A ARP000102232 A AR P000102232A AR 023894 A1 AR023894 A1 AR 023894A1
Authority
AR
Argentina
Prior art keywords
acid treatment
treatment stage
paste
stage
pulp
Prior art date
Application number
Other languages
Spanish (es)
Original Assignee
Solvay
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
Priority claimed from US09/163,319 external-priority patent/US6511928B2/en
Priority claimed from BE9900340A external-priority patent/BE1012675A6/en
Application filed by Solvay filed Critical Solvay
Publication of AR023894A1 publication Critical patent/AR023894A1/en

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Abstract

Procedimiento de deslignificacion y de blanqueo de pasta papelera química que consta de una etapa de tratamiento ácido para reducir al menos 10% lacantidad de ácidos hexenouronicos, una etapa de ajuste del pH de la pasta para depositar o redepositariones de metales alcalino-térreos sobre las fibras depasta, la adicion de un agente quelante a la pasta antes y/o durante la etapa de tratamiento ácido y/o antes, durante o después de la etapa de ajuste del pH,una etapa de lavado de la pasta y unaet apa de tratamiento de dicha pasta con un oxidante. La duracion de la etapa de tratamiento ácido es inferior a 120minutos, adáptandose la temperatura y el pH de forma que se obtenga el grado de blancura deseado.Procedure of delignification and bleaching of chemical paper pulp consisting of an acid treatment stage to reduce at least 10% the amount of hexenouronic acids, a step of adjusting the pH of the paste to deposit or redepositaries of alkaline earth metals on the fibers In addition, the addition of a chelating agent to the pulp before and / or during the acid treatment stage and / or before, during or after the pH adjustment stage, a pulp washing step and a treatment step of said paste with an oxidizer. The duration of the acid treatment stage is less than 120 minutes, the temperature and pH being adapted so that the desired degree of whiteness is obtained.

ARP000102232 1998-09-30 2000-05-09 PAPER PASTE WHITENING PROCEDURE AR023894A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/163,319 US6511928B2 (en) 1998-09-30 1998-09-30 Rayon fabric with substantial shrink-resistant properties
BE9900340A BE1012675A6 (en) 1999-05-11 1999-05-11 Bleaching pulp process.

Publications (1)

Publication Number Publication Date
AR023894A1 true AR023894A1 (en) 2002-09-04

Family

ID=45570541

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP000102232 AR023894A1 (en) 1998-09-30 2000-05-09 PAPER PASTE WHITENING PROCEDURE

Country Status (1)

Country Link
AR (1) AR023894A1 (en)

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