SE8305210L - PROCEDURE AND APPARATUS FOR MASS BLACKING - Google Patents

PROCEDURE AND APPARATUS FOR MASS BLACKING

Info

Publication number
SE8305210L
SE8305210L SE8305210A SE8305210A SE8305210L SE 8305210 L SE8305210 L SE 8305210L SE 8305210 A SE8305210 A SE 8305210A SE 8305210 A SE8305210 A SE 8305210A SE 8305210 L SE8305210 L SE 8305210L
Authority
SE
Sweden
Prior art keywords
alkaline
extraction
sheet
rapid
washing
Prior art date
Application number
SE8305210A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE8305210D0 (en
Inventor
J A Histed
A R Taylor
Canovas R E Vega
Original Assignee
Cip Inc
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 Cip Inc filed Critical Cip Inc
Publication of SE8305210D0 publication Critical patent/SE8305210D0/en
Publication of SE8305210L publication Critical patent/SE8305210L/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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • D21C11/0028—Effluents derived from the washing or bleaching plants
    • 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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites

Landscapes

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

Abstract

A process for the rapid bleaching of pulp in which chlorinated pulp is formed into a sheet on a moving foraminous surface and subjected to chlorination stage washing, a rapid first alkaline extraction, and further washing after the extraction. The treatments involve displacement of one liquid by another. The first alkaline extraction may be performed in two steps with the alkaline liquor used in the second of the steps comprising a mixture of a) recycled alkaline liquor displaced from the sheet by the washing water, b) washing water which has passed through the sheet, and c) fresh caustic. The rapid alkaline extraction replaces a complete alkaline extraction stage which would include a steam mixer, a retention tower and a washer.
SE8305210A 1982-09-29 1983-09-27 PROCEDURE AND APPARATUS FOR MASS BLACKING SE8305210L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42655282A 1982-09-29 1982-09-29

Publications (2)

Publication Number Publication Date
SE8305210D0 SE8305210D0 (en) 1983-09-27
SE8305210L true SE8305210L (en) 1984-03-30

Family

ID=23691253

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8305210A SE8305210L (en) 1982-09-29 1983-09-27 PROCEDURE AND APPARATUS FOR MASS BLACKING

Country Status (5)

Country Link
JP (1) JPS5988988A (en)
AU (1) AU1923683A (en)
CA (1) CA1246304A (en)
SE (1) SE8305210L (en)
ZA (1) ZA836912B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170268171A1 (en) * 2016-03-16 2017-09-21 Ecolab Usa Inc. Low Capital Bleaching of Chemical Pulp

Also Published As

Publication number Publication date
JPS5988988A (en) 1984-05-23
AU1923683A (en) 1984-04-05
CA1246304A (en) 1988-12-13
SE8305210D0 (en) 1983-09-27
ZA836912B (en) 1984-07-25

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