GB442336A - Improvements in and relating to processes for bleaching wood pulp - Google Patents

Improvements in and relating to processes for bleaching wood pulp

Info

Publication number
GB442336A
GB442336A GB12022/35A GB1202235A GB442336A GB 442336 A GB442336 A GB 442336A GB 12022/35 A GB12022/35 A GB 12022/35A GB 1202235 A GB1202235 A GB 1202235A GB 442336 A GB442336 A GB 442336A
Authority
GB
United Kingdom
Prior art keywords
wood pulp
relating
processes
hydrosulphite
zinc dust
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB12022/35A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB442336A publication Critical patent/GB442336A/en
Expired legal-status Critical Current

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
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
    • D21C9/1089—Bleaching ; Apparatus therefor with reducing compounds with dithionites

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
GB12022/35A 1933-09-03 1935-04-18 Improvements in and relating to processes for bleaching wood pulp Expired GB442336A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH137377D DE638711C (de) 1933-09-03 1933-09-03 Verfahren zum Bleichen von Holzstoff durch Behandlung mit Hydrosulfit

Publications (1)

Publication Number Publication Date
GB442336A true GB442336A (en) 1936-02-06

Family

ID=9996988

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12022/35A Expired GB442336A (en) 1933-09-03 1935-04-18 Improvements in and relating to processes for bleaching wood pulp

Country Status (4)

Country Link
CH (1) CH183215A (de)
DE (1) DE638711C (de)
FR (1) FR788915A (de)
GB (1) GB442336A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450034A (en) * 1943-12-01 1948-09-28 Int Paper Co Groundwood bleaching by hydrosulfite
US2635714A (en) * 1948-11-16 1953-04-21 Dunlop Rubber Co Brake with self-aligning friction surfaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450034A (en) * 1943-12-01 1948-09-28 Int Paper Co Groundwood bleaching by hydrosulfite
US2635714A (en) * 1948-11-16 1953-04-21 Dunlop Rubber Co Brake with self-aligning friction surfaces

Also Published As

Publication number Publication date
FR788915A (fr) 1935-10-18
CH183215A (de) 1936-03-31
DE638711C (de) 1936-11-21

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