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SE306659B - - Google Patents

Info

Publication number
SE306659B
SE306659B SE426965A SE426965A SE306659B SE 306659 B SE306659 B SE 306659B SE 426965 A SE426965 A SE 426965A SE 426965 A SE426965 A SE 426965A SE 306659 B SE306659 B SE 306659B
Authority
SE
Sweden
Prior art keywords
pulp
april
hydrogen sulphite
normal
impregnation
Prior art date
Application number
SE426965A
Inventor
B Groth
Original Assignee
Defibrator Ab
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 Defibrator Ab filed Critical Defibrator Ab
Priority to SE426965A priority Critical patent/SE306659B/xx
Priority to CS219166A priority patent/CS150171B2/cs
Priority to FR56129A priority patent/FR1474458A/en
Priority to DE19661692844 priority patent/DE1692844A1/en
Priority to GB1456266A priority patent/GB1147433A/en
Priority to BE678920D priority patent/BE678920A/xx
Priority to JP2002566A priority patent/JPS5335161B1/ja
Priority to NL6604344A priority patent/NL6604344A/xx
Priority to CH479766A priority patent/CH479767A/en
Priority to FI86466A priority patent/FI43668C/en
Publication of SE306659B publication Critical patent/SE306659B/xx

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
    • D21C3/04—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

Landscapes

  • Paper (AREA)

Abstract

1,147,433. Pulp. DEFIBRATOR A.B. 1 April, 1966 [2 April, 1965], No. 14562/66. Heading D2W. Pulp is made from lignocellulose-containing material by impregnating with a solution of magnesium hydrogen sulphite, thereafter heating under pressure to above 100‹C and mixing with a water-soluble alkaline nitrogen compound, the material then being mechanically defibred and beaten. The solution may also contain ammonium hydrogen sulphate and/or free SO 2 , e.g. a recirculated waste liquor regenerated with magnesium hydrogen sulphite, ammonium hydrogen sulphite and SO 2 . The basic nitrogen compound may be ammonium hydroxide, an amine or amide (urea) or an acid salt of these, e.g. with carbonic, sulphurous or acetic acid. Impregnation conducted can be at reduced, normal or elevated pressures and normal or elevated temperatures in the liquid or steam phase with a ratio of dry material: liquid of greater than 1:4. The initial material may be steamed prior to impregnation.
SE426965A 1965-04-02 1965-04-02 SE306659B (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
SE426965A SE306659B (en) 1965-04-02 1965-04-02
CS219166A CS150171B2 (en) 1965-04-02 1966-04-01
FR56129A FR1474458A (en) 1965-04-02 1966-04-01 Manufacturing process of semi-chemical and chemical-mechanical fiber pulp
DE19661692844 DE1692844A1 (en) 1965-04-02 1966-04-01 Process for the production of semi-pulps and chemo-mechanical pulps
GB1456266A GB1147433A (en) 1965-04-02 1966-04-01 Improvements in and relating to a process of manufacturing fibre pulp by chemical and mechanical means
BE678920D BE678920A (en) 1965-04-02 1966-04-01
JP2002566A JPS5335161B1 (en) 1965-04-02 1966-04-01
NL6604344A NL6604344A (en) 1965-04-02 1966-04-01
CH479766A CH479767A (en) 1965-04-02 1966-04-01 Process for the production of semi-pulps
FI86466A FI43668C (en) 1965-04-02 1966-04-02 Method of production of semi - chemical and chemomechanical pulps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE426965A SE306659B (en) 1965-04-02 1965-04-02

Publications (1)

Publication Number Publication Date
SE306659B true SE306659B (en) 1968-12-02

Family

ID=20263829

Family Applications (1)

Application Number Title Priority Date Filing Date
SE426965A SE306659B (en) 1965-04-02 1965-04-02

Country Status (10)

Country Link
JP (1) JPS5335161B1 (en)
BE (1) BE678920A (en)
CH (1) CH479767A (en)
CS (1) CS150171B2 (en)
DE (1) DE1692844A1 (en)
FI (1) FI43668C (en)
FR (1) FR1474458A (en)
GB (1) GB1147433A (en)
NL (1) NL6604344A (en)
SE (1) SE306659B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174209A (en) * 1978-06-19 1979-11-13 Eli Lilly And Company Herbicidal 1-alkyl-3-phenylpyridinium salts

Also Published As

Publication number Publication date
FI43668C (en) 1971-05-10
BE678920A (en) 1966-10-03
DE1692844A1 (en) 1971-10-28
NL6604344A (en) 1966-10-03
GB1147433A (en) 1969-04-02
JPS5335161B1 (en) 1978-09-26
CS150171B2 (en) 1973-09-04
CH479767A (en) 1969-10-15
FR1474458A (en) 1967-03-24
FI43668B (en) 1971-02-01

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