GB393159A - Improvements in defibrating wood and the like - Google Patents

Improvements in defibrating wood and the like

Info

Publication number
GB393159A
GB393159A GB2823532A GB2823532A GB393159A GB 393159 A GB393159 A GB 393159A GB 2823532 A GB2823532 A GB 2823532A GB 2823532 A GB2823532 A GB 2823532A GB 393159 A GB393159 A GB 393159A
Authority
GB
United Kingdom
Prior art keywords
temperature
defibration
defibrated
vessel
moisture
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
GB2823532A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2823532A priority Critical patent/GB393159A/en
Publication of GB393159A publication Critical patent/GB393159A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/32—Hammer mills

Landscapes

  • Paper (AREA)

Abstract

393,159. Preparation of pulp. ASPLUND, A. J. A., 18, Norr Malarstrand, Stockholm. Oct. 10, 1932, No. 28235. [Class 96.] Lignocellulose materials are defibrated by being heated to a temperature above 212‹ F., and d defibrated b y mechanical treatment at such temperature in the presence of moisture without facilitating the defibration by extended digestion. In an example, the material is chipped and steamed at 3-4 or more atmospheres at a temperature of 10-20‹ higher than the temperature of defibration, which is 300-340‹ F. for coniferous and 280-300‹ F. for hard woods. The moisture content of the material may vary from 55 to 75 per cent after heating is completed. Defibration is effected as soon as possible in kollergangs, ball or rod mills, or preferably in a closed cylindrical vessel 2 having a central rotating shaft 5 carrying blades 6, preferably pivoted at 7, which serve to throw the material against the walls of the vessel and the longitudinal bars 9. The process may be carried out in the presence of larger quantities of water and with the addition of alkalies or sulphur compounds, or the material may be defibrated and subsequently digested.
GB2823532A 1932-10-10 1932-10-10 Improvements in defibrating wood and the like Expired GB393159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2823532A GB393159A (en) 1932-10-10 1932-10-10 Improvements in defibrating wood and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2823532A GB393159A (en) 1932-10-10 1932-10-10 Improvements in defibrating wood and the like

Publications (1)

Publication Number Publication Date
GB393159A true GB393159A (en) 1933-06-01

Family

ID=10272458

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2823532A Expired GB393159A (en) 1932-10-10 1932-10-10 Improvements in defibrating wood and the like

Country Status (1)

Country Link
GB (1) GB393159A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454534A (en) * 1940-08-03 1948-11-23 Wood Conversion Co Process for defibering lignocellulose while subjected to steam and alkali-metal hydroxide
US2454532A (en) * 1940-08-03 1948-11-23 Wood Conversion Co Process for defibering lignocellulose while subjected to steam and a digestive chemical
US2454533A (en) * 1940-08-03 1948-11-23 Wood Conversion Co Manufacture of fibrous products deriving from lignocellulose

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454534A (en) * 1940-08-03 1948-11-23 Wood Conversion Co Process for defibering lignocellulose while subjected to steam and alkali-metal hydroxide
US2454532A (en) * 1940-08-03 1948-11-23 Wood Conversion Co Process for defibering lignocellulose while subjected to steam and a digestive chemical
US2454533A (en) * 1940-08-03 1948-11-23 Wood Conversion Co Manufacture of fibrous products deriving from lignocellulose

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