SE375565C - Sett att bleka kemisk massa med syre i ett forsta steg och perettiksyra i ett andra steg - Google Patents

Sett att bleka kemisk massa med syre i ett forsta steg och perettiksyra i ett andra steg

Info

Publication number
SE375565C
SE375565C SE7106636A SE663671A SE375565C SE 375565 C SE375565 C SE 375565C SE 7106636 A SE7106636 A SE 7106636A SE 663671 A SE663671 A SE 663671A SE 375565 C SE375565 C SE 375565C
Authority
SE
Sweden
Prior art keywords
acid
perettic
blake
chemical mass
mass
Prior art date
Application number
SE7106636A
Other languages
English (en)
Swedish (sv)
Other versions
SE375565B (fi
Inventor
S K Roymoulik
Original Assignee
Int Paper Co
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 Int Paper Co filed Critical Int Paper Co
Publication of SE375565B publication Critical patent/SE375565B/xx
Publication of SE375565C publication Critical patent/SE375565C/xx

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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
SE7106636A 1970-05-25 1971-05-24 Sett att bleka kemisk massa med syre i ett forsta steg och perettiksyra i ett andra steg SE375565C (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4040470A 1970-05-25 1970-05-25

Publications (2)

Publication Number Publication Date
SE375565B SE375565B (fi) 1975-04-21
SE375565C true SE375565C (sv) 1984-07-16

Family

ID=21910799

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7106636A SE375565C (sv) 1970-05-25 1971-05-24 Sett att bleka kemisk massa med syre i ett forsta steg och perettiksyra i ett andra steg

Country Status (7)

Country Link
US (1) US3695995A (fi)
JP (1) JPS5510714B1 (fi)
CA (1) CA939855A (fi)
DE (1) DE2124325C3 (fi)
FI (1) FI59432C (fi)
FR (1) FR2095038A5 (fi)
SE (1) SE375565C (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT378016B (de) * 1982-12-02 1985-06-10 Ver Edelstahlwerke Ag Verfahren zum entfaerben und/oder bleichen von zellulosematerial, insbesondere zellstoff, und vorrichtung zur durchfuehrung des verfahrens
US20080087390A1 (en) * 2006-10-11 2008-04-17 Fort James Corporation Multi-step pulp bleaching
US8845860B2 (en) 2010-09-16 2014-09-30 Georgia-Pacific Consumer Products Lp High brightness pulps from lignin rich waste papers

Also Published As

Publication number Publication date
JPS5510714B1 (fi) 1980-03-18
US3695995A (en) 1972-10-03
FR2095038A5 (fi) 1972-02-04
DE2124325B2 (de) 1979-09-27
FI59432C (fi) 1981-08-10
FI59432B (fi) 1981-04-30
DE2124325A1 (de) 1971-12-09
SE375565B (fi) 1975-04-21
DE2124325C3 (de) 1980-06-19
CA939855A (en) 1974-01-15

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