GB818828A - Process for bleaching cellulosic pulp - Google Patents

Process for bleaching cellulosic pulp

Info

Publication number
GB818828A
GB818828A GB18374/57A GB1837457A GB818828A GB 818828 A GB818828 A GB 818828A GB 18374/57 A GB18374/57 A GB 18374/57A GB 1837457 A GB1837457 A GB 1837457A GB 818828 A GB818828 A GB 818828A
Authority
GB
United Kingdom
Prior art keywords
bleaching
pulp
effected
temperature
tanks
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
GB18374/57A
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.)
Kimberly Clark Tissue Co
Original Assignee
Scott 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 Scott Paper Co filed Critical Scott Paper Co
Publication of GB818828A publication Critical patent/GB818828A/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
    • D21C9/1026—Other features in bleaching processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

Cellulosic pulp, especially pulp of high density, is admixed with a hypochlorite bleaching solution under such conditions of duration and temperature that no substantial bleaching is caused, whereafter the temperature is immediately raised to effect bleaching and, at the desired degree of brightness, the bleaching is stopped by "drowning" the mass in water. The bleach liquor may be distributed in the pulp at temperatures below 80 DEG F. The heating may be effected by the direct application of steam at temperatures of 140 DEG to 212 DEG F. The bleaching may be effected with sodium or calcium hypochlorite solution containing caustic soda. An apparatus is described and contains storage chests, priming tanks, thickeners, a shredder, a mixing-tank, retention chambers and cold water dilution tanks through which the pulp passes sequentially.
GB18374/57A 1956-07-10 1957-06-11 Process for bleaching cellulosic pulp Expired GB818828A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US818828XA 1956-07-10 1956-07-10

Publications (1)

Publication Number Publication Date
GB818828A true GB818828A (en) 1959-08-26

Family

ID=22167009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18374/57A Expired GB818828A (en) 1956-07-10 1957-06-11 Process for bleaching cellulosic pulp

Country Status (2)

Country Link
DE (1) DE1081299B (en)
GB (1) GB818828A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030158A1 (en) * 1979-12-03 1981-06-10 The Black Clawson Company Apparatus and process for medium consistency oxygen delignification of pulp
FR2546545A1 (en) * 1983-05-23 1984-11-30 Process Evaluation Devel Thermal mechanical digestion process employing bleaches

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE380224A (en) * 1922-03-13
US1597880A (en) * 1924-07-14 1926-08-31 William D Gregor Bleaching process
US2283141A (en) * 1939-06-29 1942-05-12 Buffalo Electro Chem Co Treatment of textile fabrics

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030158A1 (en) * 1979-12-03 1981-06-10 The Black Clawson Company Apparatus and process for medium consistency oxygen delignification of pulp
US4363697A (en) 1979-12-03 1982-12-14 The Black Clawson Company Method for medium consistency oxygen delignification of pulp
FR2546545A1 (en) * 1983-05-23 1984-11-30 Process Evaluation Devel Thermal mechanical digestion process employing bleaches

Also Published As

Publication number Publication date
DE1081299B (en) 1960-05-05

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