GB1068898A - Method of producing paper pulp and the like - Google Patents

Method of producing paper pulp and the like

Info

Publication number
GB1068898A
GB1068898A GB1443564A GB1443564A GB1068898A GB 1068898 A GB1068898 A GB 1068898A GB 1443564 A GB1443564 A GB 1443564A GB 1443564 A GB1443564 A GB 1443564A GB 1068898 A GB1068898 A GB 1068898A
Authority
GB
United Kingdom
Prior art keywords
sulphite
vegetable material
exceed
impregnated
vegetable
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
GB1443564A
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 GB1068898A publication Critical patent/GB1068898A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam

Abstract

Vegetable material to be pulped is impregnated with a solution of sulphite so that the ratio of water to dry vegetable matter does not exceed 3:1 and the quantity of combined base in equivalents does not exceed the quantity of combined acids in the vegetable material. The impregnated material is then heated in saturated steam at a temperature of 160 to 180 DEG C for a time shorter than 10 minutes and defibred. There is produced in high yield a pulp of high bulk, opacity and brightness, suitable for newsprint, magazines and other paper and for cartons, wallboard and fibreboard. The sulphite may be ammonium, sodium or magnesium sulphite, and may be introduced at two or more points of the reaction apparatus; part of it may be introduced immediately before the defibration. The vegetable material may be chips of wood, e.g. spruce, poplar, aspen, hornbeam or birch.
GB1443564A 1963-04-09 1964-04-08 Method of producing paper pulp and the like Expired GB1068898A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE396863 1963-04-09

Publications (1)

Publication Number Publication Date
GB1068898A true GB1068898A (en) 1967-05-17

Family

ID=20263243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1443564A Expired GB1068898A (en) 1963-04-09 1964-04-08 Method of producing paper pulp and the like

Country Status (4)

Country Link
BE (1) BE646187A (en)
DE (1) DE1249069B (en)
GB (1) GB1068898A (en)
NL (1) NL6403714A (en)

Also Published As

Publication number Publication date
NL6403714A (en) 1964-10-12
DE1249069B (en) 1967-08-31
BE646187A (en) 1964-10-06

Similar Documents

Publication Publication Date Title
GB945957A (en) Continuous pulping process
US2234188A (en) Process of making light-colored ligno-cellulose fiber
SE7317565L (en)
SE7900302L (en) DEFIBRATION SET RESPECTIVE REFINING OF LIGNOCELLULOSALLY FIBER MATERIALS
SE8304973L (en) PROCEDURE FOR THE PREPARATION OF COOKET LIQUID FOR POWER MASS COOKING
GB1064567A (en) Method in the manufacture of chemo-mechanical pulps by heating and defibrating in a vapour atmosphere under pressure and at increased temperature of wood chips impregnated with sulphite solution
GB1068898A (en) Method of producing paper pulp and the like
ES345665A1 (en) Bleaching fluffed mechanical wood pulp with hydrogen peroxide
SE7500167L (en)
GB1095279A (en) Bleaching pulps
GB1095280A (en) Bleaching of wood pulps
DE2964181D1 (en) Process and apparatus for the continuous cooking of fibrous plant material
AU543439B2 (en) Accelerated pulping process
GB885605A (en) Improved method for the production of neutral sulfite pulp
ES409498A1 (en) Alkaline digestion of a mixture of cotton linters and fibrous vegetable material and product thereof
SE7612248L (en) BOILING OF LIGNOCELLULOSE-MATERIALS
GB1076124A (en) Method of making fibreboard and the like
SE7905990L (en) PROCEDURES FOR PREPARING PAPER Pulp
SU560024A1 (en) The method of producing hemicellulose
GB1110053A (en) Improvements in or relating to methods of preparing cellulose pulp, notably paper pulp, and products thus obtained and materials deriving therefrom
KR920000746B1 (en) Mechanical process
ES219993A1 (en) A procedure for obtaining blended cellulose mixtures (Machine-translation by Google Translate, not legally binding)
GB997359A (en) Chemical process for pulping wood
GB883224A (en) Method of producing wood pulp
DE1077523B (en) Process for the production of paper from semi-cellulose produced by the alkali monosulphite process from Schaelspaenen and plane chips