SE8602592L - PROCEDURAL KIT AND APPARATUS FOR CHLORO GAS TREATMENT OF CELLULOSA MATERIAL - Google Patents

PROCEDURAL KIT AND APPARATUS FOR CHLORO GAS TREATMENT OF CELLULOSA MATERIAL

Info

Publication number
SE8602592L
SE8602592L SE8602592A SE8602592A SE8602592L SE 8602592 L SE8602592 L SE 8602592L SE 8602592 A SE8602592 A SE 8602592A SE 8602592 A SE8602592 A SE 8602592A SE 8602592 L SE8602592 L SE 8602592L
Authority
SE
Sweden
Prior art keywords
mixer
treatment
pulp
chlorine gas
retention vessel
Prior art date
Application number
SE8602592A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE466459B (en
SE8602592D0 (en
Inventor
M I Sherman
J R Phillips
G Rowlandson
Original Assignee
Kamyr 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 Kamyr Inc filed Critical Kamyr Inc
Publication of SE8602592D0 publication Critical patent/SE8602592D0/en
Publication of SE8602592L publication Critical patent/SE8602592L/en
Publication of SE466459B publication Critical patent/SE466459B/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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • External Artificial Organs (AREA)
  • Materials For Medical Uses (AREA)
  • Treating Waste Gases (AREA)
  • Treatment Of Sludge (AREA)

Abstract

A method and apparatus are provided for increasing the efficiency of treatment of a paper pulp slurry with chlorine gas, such as in the bleaching or delignification of deciduous wood chemical pulps, coniferous wood chemical pulps, and non-wood fibrous chemical pulps. Chlorine gas is intimately mixed with the pulp in a fluidizing mixer (14), the pulp preferably having a consistency of about 7-12%, and then is passed to a retention vessel (20). The discharge of pulp from the mixer to the retention vessel, and from the retention vessel to other treatment structures, is throttled by valves (30, 31) so as to increase the pressure in both the mixer and the retention vessel to above atmospheric, and preferably in the range of about 15-150 psig (1 to 10 bar above atmospheric pressure). The chlorine gas is added to the mixer through one more discs (53) of porous materials having pore sizes in the range of about 5-175 microns, such as porous ceramic or sintered metal discs. The increased pressure during the chlorine treatment, and the introduction of the chlorine gas in the form of minute bubbles, improve the solubility of the chlorine in the pulp slurry and thereby increase the efficiency of treatment. (Figure 1).
SE8602592A 1985-06-14 1986-06-10 PROCEDURE AND DEVICE FOR CELLULOSAMASSA CHARACTERIZATION IN OVERPRESSED SE466459B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74467885A 1985-06-14 1985-06-14

Publications (3)

Publication Number Publication Date
SE8602592D0 SE8602592D0 (en) 1986-06-10
SE8602592L true SE8602592L (en) 1986-12-15
SE466459B SE466459B (en) 1992-02-17

Family

ID=24993592

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8602592A SE466459B (en) 1985-06-14 1986-06-10 PROCEDURE AND DEVICE FOR CELLULOSAMASSA CHARACTERIZATION IN OVERPRESSED

Country Status (9)

Country Link
EP (1) EP0207062B1 (en)
JP (1) JPS61289192A (en)
AT (1) ATE48452T1 (en)
BR (1) BR8602738A (en)
CA (1) CA1276408C (en)
DE (1) DE3667310D1 (en)
FI (1) FI85728C (en)
NO (1) NO168123C (en)
SE (1) SE466459B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US56833A (en) * 1866-07-31 Improvement in bleaching paper-stock
US1971241A (en) * 1933-04-01 1934-08-21 Pennsylvania Salt Mfg Co Method of chlorination
DE1621684A1 (en) * 1967-10-04 1971-07-08 Bellmer Geb Kg Maschf Machine combination for the line section in pulp processing plants
SE387671B (en) * 1973-04-27 1976-09-13 Mo Och Domsjoe Ab COMPACT WHITE BLEACHING, NON-FLUFFAT LIQUID LIGNOCELLULOSE MATERIAL WITH GASY BLEACHING, PREFERABLY ACID GAS

Also Published As

Publication number Publication date
FI85728C (en) 1992-05-25
CA1276408C (en) 1990-11-20
FI862082A0 (en) 1986-05-19
NO168123C (en) 1992-01-15
EP0207062B1 (en) 1989-12-06
SE466459B (en) 1992-02-17
DE3667310D1 (en) 1990-01-11
ATE48452T1 (en) 1989-12-15
JPS61289192A (en) 1986-12-19
FI862082A (en) 1986-12-15
BR8602738A (en) 1987-02-10
SE8602592D0 (en) 1986-06-10
NO168123B (en) 1991-10-07
NO862116L (en) 1986-12-15
FI85728B (en) 1992-02-14
EP0207062A1 (en) 1986-12-30

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