GB764425A - Process of and apparatus for continuously chlorinating semi-chemical cellulose - Google Patents

Process of and apparatus for continuously chlorinating semi-chemical cellulose

Info

Publication number
GB764425A
GB764425A GB1404/55A GB140455A GB764425A GB 764425 A GB764425 A GB 764425A GB 1404/55 A GB1404/55 A GB 1404/55A GB 140455 A GB140455 A GB 140455A GB 764425 A GB764425 A GB 764425A
Authority
GB
United Kingdom
Prior art keywords
chlorine
semi
reaction chamber
chamber
stirrer
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
GB1404/55A
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.)
GIULIO CONSIGLIO
SINDACATO CELLULOSA POMILLO SP
Original Assignee
GIULIO CONSIGLIO
SINDACATO CELLULOSA POMILLO SP
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 GIULIO CONSIGLIO, SINDACATO CELLULOSA POMILLO SP filed Critical GIULIO CONSIGLIO
Publication of GB764425A publication Critical patent/GB764425A/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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

<PICT:0764425/IV(a)/1> Semi-chemical cellulose is subjected to treatment with molecular chlorine in a continuous process in which the semi-pulp is treated with the chlorine in at least three successive stages at increasing cellulose dilution, without any intermediate alkaline treatment. The temperature of the material in any stage is regulated by the introduction of diluting water of a predetermined temperature or steam. The successive reactions may be carried out in separate vessels or in different compartments of a single apparatus. As shown, semi-pulp is introduced into the first reaction chamber 1, consisting of several vertical tubes made of chlorine-resisting material, which empty into a vessel 3. The vessel 3 is lined with acid-resisting material and is provided with a mechanically actuated extractor 2 and an agitator. The material descends the tubes by gravity, past nozzles through which the chlorine is introduced. The material then passes through a second reaction chamber 4 in which it is agitated by helical stirrer 6, arranged so as to agitate the material in the lower part of the chamber only. Chlorine is introduced through the hollow stirrer shaft, and diluting water-which may have its pH value adjusted by the addition of hydrochloric acid-is introduced tangentially in the vicinity of the stirrer. The material then passes to a third reaction chamber 5 similar to the chamber 4.
GB1404/55A 1954-07-19 1955-01-17 Process of and apparatus for continuously chlorinating semi-chemical cellulose Expired GB764425A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT764425X 1954-07-19

Publications (1)

Publication Number Publication Date
GB764425A true GB764425A (en) 1956-12-28

Family

ID=11315974

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1404/55A Expired GB764425A (en) 1954-07-19 1955-01-17 Process of and apparatus for continuously chlorinating semi-chemical cellulose

Country Status (2)

Country Link
FR (1) FR1141890A (en)
GB (1) GB764425A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093506A (en) * 1975-03-14 1978-06-06 Kamyr Aktiebolag Method and apparatus for effecting even distribution and mixing of high consistency pulp and treatment fluid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093506A (en) * 1975-03-14 1978-06-06 Kamyr Aktiebolag Method and apparatus for effecting even distribution and mixing of high consistency pulp and treatment fluid

Also Published As

Publication number Publication date
FR1141890A (en) 1957-09-11

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