SE7805124L - PROCEDURE FOR THE PREPARATION OF CONVERTED CELLULOSA MASS WITH THE MAGNESIUM SULPHITE PROCEDURE - Google Patents

PROCEDURE FOR THE PREPARATION OF CONVERTED CELLULOSA MASS WITH THE MAGNESIUM SULPHITE PROCEDURE

Info

Publication number
SE7805124L
SE7805124L SE7805124A SE7805124A SE7805124L SE 7805124 L SE7805124 L SE 7805124L SE 7805124 A SE7805124 A SE 7805124A SE 7805124 A SE7805124 A SE 7805124A SE 7805124 L SE7805124 L SE 7805124L
Authority
SE
Sweden
Prior art keywords
procedure
magnesium
cellulosa
converted
mass
Prior art date
Application number
SE7805124A
Other languages
Swedish (sv)
Inventor
R Patt
Original Assignee
Escher Wyss Ag
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 Escher Wyss Ag filed Critical Escher Wyss Ag
Publication of SE7805124L publication Critical patent/SE7805124L/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • D21C3/10—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites magnesium bisulfite

Landscapes

  • Paper (AREA)
  • Treating Waste Gases (AREA)

Abstract

Method of producing spruce wood celluloses by the sulphite process on a magnesium basis, in which spruce wood hogged chips are pretreated with milk of magnesium hydroxide or with magnesium sulphate solution at room temperature in a pretreatment stage and, after intermediate storage, are decomposed with a magnesium bisulphite solution at pH values of around 4.
SE7805124A 1977-05-03 1978-05-03 PROCEDURE FOR THE PREPARATION OF CONVERTED CELLULOSA MASS WITH THE MAGNESIUM SULPHITE PROCEDURE SE7805124L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH548977 1977-05-03

Publications (1)

Publication Number Publication Date
SE7805124L true SE7805124L (en) 1978-11-04

Family

ID=4294440

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7805124A SE7805124L (en) 1977-05-03 1978-05-03 PROCEDURE FOR THE PREPARATION OF CONVERTED CELLULOSA MASS WITH THE MAGNESIUM SULPHITE PROCEDURE

Country Status (6)

Country Link
JP (1) JPS53139802A (en)
AT (1) AT364908B (en)
BR (1) BR7802645A (en)
CA (1) CA1101616A (en)
FI (1) FI781351A (en)
SE (1) SE7805124L (en)

Also Published As

Publication number Publication date
BR7802645A (en) 1978-12-12
AT364908B (en) 1981-11-25
CA1101616A (en) 1981-05-26
FI781351A (en) 1978-11-04
ATA316478A (en) 1981-04-15
JPS53139802A (en) 1978-12-06

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