GB8424540D0 - Producing wood pulp - Google Patents

Producing wood pulp

Info

Publication number
GB8424540D0
GB8424540D0 GB848424540A GB8424540A GB8424540D0 GB 8424540 D0 GB8424540 D0 GB 8424540D0 GB 848424540 A GB848424540 A GB 848424540A GB 8424540 A GB8424540 A GB 8424540A GB 8424540 D0 GB8424540 D0 GB 8424540D0
Authority
GB
United Kingdom
Prior art keywords
wood pulp
producing wood
producing
pulp
wood
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.)
Granted
Application number
GB848424540A
Other versions
GB2148344A (en
GB2148344B (en
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.)
Melamine Chemicals Inc
Original Assignee
Melamine Chemicals 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
Priority claimed from US06/537,876 external-priority patent/US4487656A/en
Application filed by Melamine Chemicals Inc filed Critical Melamine Chemicals Inc
Publication of GB8424540D0 publication Critical patent/GB8424540D0/en
Publication of GB2148344A publication Critical patent/GB2148344A/en
Application granted granted Critical
Publication of GB2148344B publication Critical patent/GB2148344B/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/07—Nitrogen-containing compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents
    • 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
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D21C9/005—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives organic 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Prostheses (AREA)
GB08424540A 1983-09-30 1984-09-28 Wood pulp incorporating melamine or ammeline Expired GB2148344B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US53792683A 1983-09-30 1983-09-30
US53792783A 1983-09-30 1983-09-30
US06/537,876 US4487656A (en) 1983-09-30 1983-09-30 Process for bleaching paper pulp using melamine as a viscosity stabilizer
US65175184A 1984-09-19 1984-09-19

Publications (3)

Publication Number Publication Date
GB8424540D0 true GB8424540D0 (en) 1984-11-07
GB2148344A GB2148344A (en) 1985-05-30
GB2148344B GB2148344B (en) 1987-04-15

Family

ID=27504668

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08424540A Expired GB2148344B (en) 1983-09-30 1984-09-28 Wood pulp incorporating melamine or ammeline

Country Status (10)

Country Link
AT (1) ATA310984A (en)
BR (1) BR8404914A (en)
DE (1) DE3436015A1 (en)
FI (1) FI74082C (en)
FR (1) FR2552792B1 (en)
GB (1) GB2148344B (en)
IT (1) IT1180236B (en)
NO (1) NO843919L (en)
NZ (1) NZ209708A (en)
SE (1) SE464031B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230655A1 (en) * 1992-09-14 1994-03-17 Ciba Geigy Process for improving the whiteness, brightness and color location of fibrous materials
DE4230656A1 (en) * 1992-09-14 1994-03-17 Ciba Geigy Process to improve whiteness, brightness and color location of fillers and pigments
CN115110329A (en) * 2022-06-28 2022-09-27 中国制浆造纸研究院有限公司 Method for reducing metal content and ash content in bleaching section pulp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB600961A (en) * 1944-09-20 1948-04-23 Du Pont Improvements in or relating to the impregnation of wood with urea-formaldehyde resins
BE566286A (en) * 1957-04-02
FR1281896A (en) * 1960-09-07 1962-01-19 Westinghouse Electric Corp Process for stabilizing cellulosic insulation in contact with liquid dielectrics
GB1500599A (en) * 1975-11-28 1978-02-08 Koppers Co Inc Compositions for imparting fire retardance to wood

Also Published As

Publication number Publication date
ATA310984A (en) 1991-11-15
FI74082C (en) 1987-12-10
GB2148344A (en) 1985-05-30
FR2552792A1 (en) 1985-04-05
BR8404914A (en) 1985-08-20
FI843831L (en) 1985-03-31
GB2148344B (en) 1987-04-15
DE3436015A1 (en) 1985-05-02
FI843831A0 (en) 1984-09-28
NZ209708A (en) 1988-08-30
DE3436015C2 (en) 1990-03-08
SE464031B (en) 1991-02-25
NO843919L (en) 1985-04-01
SE8404867D0 (en) 1984-09-28
FR2552792B1 (en) 1987-01-09
SE8404867L (en) 1985-03-31
IT1180236B (en) 1987-09-23
FI74082B (en) 1987-08-31
IT8422893A0 (en) 1984-09-28

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920928