SE7609148L - PROCEDURE FOR THE PREPARATION OF CELLULOSA - Google Patents

PROCEDURE FOR THE PREPARATION OF CELLULOSA

Info

Publication number
SE7609148L
SE7609148L SE7609148A SE7609148A SE7609148L SE 7609148 L SE7609148 L SE 7609148L SE 7609148 A SE7609148 A SE 7609148A SE 7609148 A SE7609148 A SE 7609148A SE 7609148 L SE7609148 L SE 7609148L
Authority
SE
Sweden
Prior art keywords
raw material
cellulosa
procedure
preparation
delignification
Prior art date
Application number
SE7609148A
Other languages
Swedish (sv)
Inventor
A Stonis
G N E Krogh
Original Assignee
Suzano Papel & Celulose
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 Suzano Papel & Celulose filed Critical Suzano Papel & Celulose
Publication of SE7609148L publication Critical patent/SE7609148L/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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

The present invention provides a method of manufacturing a chemical pulp from a fibrous raw material which comprises homogeneously impregnating the fibrous raw material with an alkali solution of weaker chemical activity whereby to minimize delignification of said raw material, subjecting said alkali impregnated raw material to mechanical defibration and treating said defibrated raw material with an alkali solution of stronger chemical activity to effect delignification thereof.
SE7609148A 1975-08-20 1976-08-17 PROCEDURE FOR THE PREPARATION OF CELLULOSA SE7609148L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BR7505352 1975-08-20

Publications (1)

Publication Number Publication Date
SE7609148L true SE7609148L (en) 1977-02-21

Family

ID=3996454

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7609148A SE7609148L (en) 1975-08-20 1976-08-17 PROCEDURE FOR THE PREPARATION OF CELLULOSA

Country Status (4)

Country Link
JP (1) JPS5237802A (en)
CA (1) CA1066697A (en)
FI (1) FI762341A (en)
SE (1) SE7609148L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20105799A0 (en) 2010-07-13 2010-07-13 Olli Joutsimo Improved chemical pulp manufacturing process
WO2018187238A1 (en) * 2017-04-03 2018-10-11 University Of Maryland, College Park Flexible wood structures and devices, and methods for fabricating and use thereof
US20180356127A1 (en) 2017-06-09 2018-12-13 University Of Maryland, College Park Wood-based solar thermal devices, and methods for fabrication and use thereof
EP3681682A4 (en) 2017-09-15 2021-06-16 University of Maryland, College Park Delignified wood materials, and methods for fabricating and use thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773610A (en) * 1970-12-11 1973-11-20 Bauer Bros Co Pressurized system for pulp refining including pressurized double disk treatment
JPS4887101A (en) * 1972-02-22 1973-11-16

Also Published As

Publication number Publication date
CA1066697A (en) 1979-11-20
JPS5237802A (en) 1977-03-24
FI762341A (en) 1977-02-21

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