CA932908A - Cellulosic bleaching process - Google Patents

Cellulosic bleaching process

Info

Publication number
CA932908A
CA932908A CA944750A CA944750A CA932908A CA 932908 A CA932908 A CA 932908A CA 944750 A CA944750 A CA 944750A CA 944750 A CA944750 A CA 944750A CA 932908 A CA932908 A CA 932908A
Authority
CA
Canada
Prior art keywords
bleaching process
cellulosic
cellulosic bleaching
bleaching
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
CA944750A
Other languages
English (en)
Inventor
V. Johnson Loyd
Q. Jack Walter
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.)
Hooker Chemical Corp
Original Assignee
Hooker Chemical Corp
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 Hooker Chemical Corp filed Critical Hooker Chemical Corp
Application granted granted Critical
Publication of CA932908A publication Critical patent/CA932908A/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
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
CA944750A 1965-06-28 1965-11-06 Cellulosic bleaching process Expired CA932908A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46769765A 1965-06-28 1965-06-28

Publications (1)

Publication Number Publication Date
CA932908A true CA932908A (en) 1973-09-04

Family

ID=37084838

Family Applications (1)

Application Number Title Priority Date Filing Date
CA944750A Expired CA932908A (en) 1965-06-28 1965-11-06 Cellulosic bleaching process

Country Status (7)

Country Link
US (1) US3433702A (cs)
BE (1) BE699505A (cs)
CA (1) CA932908A (cs)
DE (1) DE1594861B2 (cs)
FR (1) FR1484998A (cs)
GB (1) GB1145339A (cs)
NO (1) NO126747B (cs)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1100709A (en) * 1965-06-25 1968-01-24 Pulp Paper Res Inst Two-stage purification of fibrous cellulose material
USRE28777E (en) * 1969-02-06 1976-04-20 Ethyl Corporation Refining of vegetable matter and delignification of the refined matter with chlorine dioxide
US3884752A (en) * 1973-09-17 1975-05-20 Int Paper Co Single vessel wood pulp bleaching with chlorine dioxide followed by sodium hypochlorite or alkaline extraction
US3907632A (en) * 1973-10-23 1975-09-23 Ppg Industries Inc Bleaching cellulosic pulps with gaseous chlorine at a pH of 7 to 10 in a multistage bleaching process
US4081317A (en) * 1973-12-18 1978-03-28 Hooker Chemicals & Plastics Corporation Process for the reduction of effluent color from a cellulosic pulp bleaching sequence
SE391750B (sv) * 1974-03-21 1977-02-28 Kamyr Ab Sett att i ett kerl kontinuerligt behandla cellulosamassa med klor
US4039374A (en) * 1975-08-29 1977-08-02 Union Camp Corporation Bleaching of cellulosic pulp fibers with chlorine dioxide in the presence of a vanadium compound
US4096029A (en) * 1976-04-26 1978-06-20 The Dow Chemical Company Cellulosic pulp delignification using an acidic bromine-chlorine mixture
US4325783A (en) * 1978-03-30 1982-04-20 Erco Industries Limited Bleaching procedure using chlorine dioxide and chlorine solutions
US4259149A (en) * 1978-05-03 1981-03-31 Hooker Chemicals & Plastics Corp. Method of reducing waste stream pollutants by the control and separation of waste contaminants from a multi-stage cellulosic bleaching sequence
US4299653A (en) * 1979-04-16 1981-11-10 Erco Industries Limited Method of bleaching pulp with an aqueous solution of chlorine dioxide and chlorine followed by a chlorine solution
DE69026105T2 (de) * 1989-10-19 1996-09-26 Univ North Carolina Hochleistendes verfahren zum bleichen von zellstoff mit chlordioxyd
US5268075A (en) * 1989-10-19 1993-12-07 North Carolina State University High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process
CA2067750A1 (en) * 1989-10-19 1991-04-20 Hou-Min Chang Chlorine dioxide pulp bleaching process using sequential chlorine addition
US5030324A (en) * 1990-01-29 1991-07-09 Champion International Corporation Sequential bleaching procedure using chlorine and chlorine dioxide in a first chlorination stage of a multistage bleaching process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2513788A (en) * 1947-01-31 1950-07-04 Brown Co Bleaching of sulfate wood pulp
BE518419A (cs) * 1952-03-26
US2903326A (en) * 1956-10-17 1959-09-08 Pennsalt Chemicals Corp Improved process for bleaching cellulose pulp using chlorate
US3020197A (en) * 1960-08-05 1962-02-06 Allied Chem Method for production of high brightness high strength wood pulps

Also Published As

Publication number Publication date
NO126747B (cs) 1973-03-19
DE1594861A1 (de) 1972-05-25
BE699505A (cs) 1967-11-16
FR1484998A (fr) 1967-06-16
DE1594861B2 (de) 1973-10-04
DE1594861C3 (cs) 1974-05-09
US3433702A (en) 1969-03-18
GB1145339A (en) 1969-03-12

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