SE7407273L - - Google Patents

Info

Publication number
SE7407273L
SE7407273L SE7407273A SE7407273A SE7407273L SE 7407273 L SE7407273 L SE 7407273L SE 7407273 A SE7407273 A SE 7407273A SE 7407273 A SE7407273 A SE 7407273A SE 7407273 L SE7407273 L SE 7407273L
Authority
SE
Sweden
Prior art keywords
pulp
bleaching
hydrolyzed
chlorine
minimum
Prior art date
Application number
SE7407273A
Other languages
Unknown language ( )
Other versions
SE415674B (en
Inventor
H Kruger
H Schroter
W Traser
H Pfand
H Tath
Original Assignee
Degussa
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 Degussa filed Critical Degussa
Publication of SE7407273L publication Critical patent/SE7407273L/
Publication of SE415674B publication Critical patent/SE415674B/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
    • D21C9/1057—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)

Abstract

The present invention provides in a multistage process for fully bleaching a pulp, the improvement in which in the first stage of said bleaching process, the pulp is hydrolyzed with a strongly alkaline aqueous peroxide solution whereby a minimum of chlorine may be used in said process.
SE7407273A 1973-06-01 1974-05-31 MULTIPLE-STEP PROCEDURE FOR CHLOROUS WHITENING OF CELLULOSAMASSA SE415674B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2327900A DE2327900C3 (en) 1973-06-01 1973-06-01 Bleaching of cellulose with considerably reduced use of chlorine
ZA757622A ZA757622B (en) 1973-06-01 1975-12-04 Bleaching process for wood pulp with the use of considerably reduced amounts of chlorine
CH1587875A CH618487A5 (en) 1973-06-01 1975-12-05 Multiple-stage process for the low-chlorine complete bleaching of wood pulp
FR7628206A FR2364999A1 (en) 1973-06-01 1976-09-20 Bleaching of cellulose pulps with reduced chlorine use - involving an initial degradation stage using strongly alkaline peroxide

Publications (2)

Publication Number Publication Date
SE7407273L true SE7407273L (en) 1974-12-02
SE415674B SE415674B (en) 1980-10-20

Family

ID=27429620

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7407273A SE415674B (en) 1973-06-01 1974-05-31 MULTIPLE-STEP PROCEDURE FOR CHLOROUS WHITENING OF CELLULOSAMASSA

Country Status (9)

Country Link
AT (1) AT334732B (en)
BE (1) BE836358A (en)
CA (1) CA1055656A (en)
CH (1) CH618487A5 (en)
DE (1) DE2327900C3 (en)
FI (1) FI62361C (en)
FR (1) FR2364999A1 (en)
SE (1) SE415674B (en)
ZA (1) ZA757622B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2327900C3 (en) * 1973-06-01 1985-02-07 Degussa Ag, 6000 Frankfurt Bleaching of cellulose with considerably reduced use of chlorine
DE2538673C2 (en) * 1975-08-30 1986-01-16 Degussa Ag, 6000 Frankfurt Bleaching of cellulose with considerably reduced use of chlorine
BE869153A (en) * 1977-07-29 1979-01-22 Ugine Kuhlmann PROCESS FOR THE MANUFACTURE OF CHEMICAL PAPER PULP
DE2841013C2 (en) * 1978-09-21 1984-06-07 Degussa Ag, 6000 Frankfurt Process for full bleaching of pulp
US9631316B2 (en) * 2012-12-31 2017-04-25 Api Intellectual Property Holdings, Llc Biomass fractionation processes employing sulfur dioxide

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527563A (en) * 1947-08-13 1950-10-31 Buffalo Electro Chem Co Method of bleaching semichemical pulps
FR1118216A (en) * 1954-02-02 1956-06-01 I Ab Half-cellulose bleaching process
DE2327900C3 (en) * 1973-06-01 1985-02-07 Degussa Ag, 6000 Frankfurt Bleaching of cellulose with considerably reduced use of chlorine

Also Published As

Publication number Publication date
BE836358A (en) 1976-04-01
FI62361C (en) 1982-12-10
SE415674B (en) 1980-10-20
CA1055656A (en) 1979-06-05
DE2327900B2 (en) 1978-08-03
AT334732B (en) 1976-02-10
FI132674A (en) 1974-12-02
FR2364999B1 (en) 1979-01-12
FR2364999A1 (en) 1978-04-14
ATA452974A (en) 1976-05-15
DE2327900C3 (en) 1985-02-07
FI62361B (en) 1982-08-31
DE2327900A1 (en) 1975-01-02
CH618487A5 (en) 1980-07-31
ZA757622B (en) 1976-11-24

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