FI973012A - Method for dithionite bleaching - Google Patents

Method for dithionite bleaching Download PDF

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Publication number
FI973012A
FI973012A FI973012A FI973012A FI973012A FI 973012 A FI973012 A FI 973012A FI 973012 A FI973012 A FI 973012A FI 973012 A FI973012 A FI 973012A FI 973012 A FI973012 A FI 973012A
Authority
FI
Finland
Prior art keywords
pulp
dithionite
bleaching
oxidation
oxygen
Prior art date
Application number
FI973012A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI973012A0 (en
FI104573B (en
Inventor
Teuvo Pekuri
Original Assignee
Upm Kymmene Oy
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 Upm Kymmene Oy filed Critical Upm Kymmene Oy
Priority to FI973012A priority Critical patent/FI104573B/en
Publication of FI973012A0 publication Critical patent/FI973012A0/en
Publication of FI973012A publication Critical patent/FI973012A/en
Application granted granted Critical
Publication of FI104573B publication Critical patent/FI104573B/en

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Abstract

The invention relates to a process for dithionite bleaching, in which, after a reduced bleaching which has been performed using dithionite, the bleached fibre pulp is conveyed to a paper making machine for the purpose of making paper. An oxygen-emitting compound is supplied to the pulp, which compound brings about oxidation of the breakdown products of the oxygen without increasing the brightness of the pulp, and a base is also supplied to the pulp for the purpose of compensating for the lowering of the pH which has been caused by the oxidation. <IMAGE>
FI973012A 1997-07-16 1997-07-16 Process for dithionite bleaching FI104573B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI973012A FI104573B (en) 1997-07-16 1997-07-16 Process for dithionite bleaching

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI973012A FI104573B (en) 1997-07-16 1997-07-16 Process for dithionite bleaching
FI973012 1997-07-16

Publications (3)

Publication Number Publication Date
FI973012A0 FI973012A0 (en) 1997-07-16
FI973012A true FI973012A (en) 1999-01-17
FI104573B FI104573B (en) 2000-02-29

Family

ID=8549266

Family Applications (1)

Application Number Title Priority Date Filing Date
FI973012A FI104573B (en) 1997-07-16 1997-07-16 Process for dithionite bleaching

Country Status (1)

Country Link
FI (1) FI104573B (en)

Also Published As

Publication number Publication date
FI973012A0 (en) 1997-07-16
FI104573B (en) 2000-02-29

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