GB1147433A - Improvements in and relating to a process of manufacturing fibre pulp by chemical and mechanical means - Google Patents

Improvements in and relating to a process of manufacturing fibre pulp by chemical and mechanical means

Info

Publication number
GB1147433A
GB1147433A GB1456266A GB1456266A GB1147433A GB 1147433 A GB1147433 A GB 1147433A GB 1456266 A GB1456266 A GB 1456266A GB 1456266 A GB1456266 A GB 1456266A GB 1147433 A GB1147433 A GB 1147433A
Authority
GB
United Kingdom
Prior art keywords
pulp
april
hydrogen sulphite
normal
impregnation
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.)
Expired
Application number
GB1456266A
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.)
Valmet AB
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
Publication of GB1147433A publication Critical patent/GB1147433A/en
Expired legal-status Critical Current

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.
GB1456266A 1965-04-02 1966-04-01 Improvements in and relating to a process of manufacturing fibre pulp by chemical and mechanical means Expired GB1147433A (en)

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
GB1147433A true GB1147433A (en) 1969-04-02

Family

ID=20263829

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1456266A Expired GB1147433A (en) 1965-04-02 1966-04-01 Improvements in and relating to a process of manufacturing fibre pulp by chemical and mechanical means

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006359A1 (en) * 1978-06-19 1980-01-09 Eli Lilly And Company Use of 1-alkyl-3-phenylpyridinium salts as herbicides and herbicidal formulations containing the salts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006359A1 (en) * 1978-06-19 1980-01-09 Eli Lilly And Company Use of 1-alkyl-3-phenylpyridinium salts as herbicides and herbicidal formulations containing the salts

Also Published As

Publication number Publication date
SE306659B (en) 1968-12-02
CH479767A (en) 1969-10-15
NL6604344A (en) 1966-10-03
FI43668C (en) 1971-05-10
BE678920A (en) 1966-10-03
DE1692844A1 (en) 1971-10-28
FI43668B (en) 1971-02-01
CS150171B2 (en) 1973-09-04
FR1474458A (en) 1967-03-24
JPS5335161B1 (en) 1978-09-26

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