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FI781941A - Foerfarande foer reducering av traemassa eller en slurry av lera med hydrosulfit och natriumborhydrid - Google Patents

Foerfarande foer reducering av traemassa eller en slurry av lera med hydrosulfit och natriumborhydrid

Info

Publication number
FI781941A
FI781941A FI781941A FI781941A FI781941A FI 781941 A FI781941 A FI 781941A FI 781941 A FI781941 A FI 781941A FI 781941 A FI781941 A FI 781941A FI 781941 A FI781941 A FI 781941A
Authority
FI
Finland
Prior art keywords
traemassa
hydrosulfit
borhydrid
lera
eller
Prior art date
Application number
FI781941A
Other languages
English (en)
Finnish (fi)
Inventor
Edward A Sullivan
Jr Maurice L Atkinson
Original Assignee
Ventron 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 Ventron Corp filed Critical Ventron Corp
Publication of FI781941A publication Critical patent/FI781941A/fi

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/04—Clay; Kaolin
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/22—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using vat dyestuffs including indigo
    • D06P1/221—Reducing systems; Reducing catalysts
    • 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
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
    • D21C9/1089—Bleaching ; Apparatus therefor with reducing compounds with dithionites

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Silicon Compounds (AREA)
  • Removal Of Specific Substances (AREA)
FI781941A 1977-06-17 1978-06-16 Foerfarande foer reducering av traemassa eller en slurry av lera med hydrosulfit och natriumborhydrid FI781941A (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80746377A 1977-06-17 1977-06-17

Publications (1)

Publication Number Publication Date
FI781941A true FI781941A (fi) 1978-12-18

Family

ID=25196428

Family Applications (1)

Application Number Title Priority Date Filing Date
FI781941A FI781941A (fi) 1977-06-17 1978-06-16 Foerfarande foer reducering av traemassa eller en slurry av lera med hydrosulfit och natriumborhydrid

Country Status (8)

Country Link
JP (1) JPS546901A (sv)
BE (1) BE868255A (sv)
DE (1) DE2826821A1 (sv)
FI (1) FI781941A (sv)
FR (1) FR2394639A1 (sv)
IT (1) IT1105547B (sv)
NO (1) NO782114L (sv)
SE (1) SE7806928L (sv)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9212926D0 (en) * 1992-06-18 1992-07-29 Morton Int Inc Method of bleaching paper pulp
EP1146089A1 (en) * 2000-04-10 2001-10-17 Rohm And Haas Company Methods for bleaching kaolin clay and other minerals and bleached products obtained by the method
US20100224333A1 (en) 2009-03-09 2010-09-09 Prasad Duggirala Method and chemical composition to improve efficiency of mechanical pulp
US9932709B2 (en) 2013-03-15 2018-04-03 Ecolab Usa Inc. Processes and compositions for brightness improvement in paper production

Also Published As

Publication number Publication date
DE2826821A1 (de) 1979-01-18
SE7806928L (sv) 1978-12-18
FR2394639A1 (fr) 1979-01-12
IT7849932A0 (it) 1978-06-19
BE868255A (fr) 1978-10-16
IT1105547B (it) 1985-11-04
JPS546901A (en) 1979-01-19
NO782114L (no) 1978-12-19

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Legal Events

Date Code Title Description
FD Application lapsed

Owner name: VENTRON CORPORATION