GB765690A - Improvements in or relating to a process of producing groundwood pulp - Google Patents

Improvements in or relating to a process of producing groundwood pulp

Info

Publication number
GB765690A
GB765690A GB13591/54A GB1359154A GB765690A GB 765690 A GB765690 A GB 765690A GB 13591/54 A GB13591/54 A GB 13591/54A GB 1359154 A GB1359154 A GB 1359154A GB 765690 A GB765690 A GB 765690A
Authority
GB
United Kingdom
Prior art keywords
relating
wood
ammonia
potassium
sodium
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
GB13591/54A
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.)
POWELL RIVER Co Ltd
Original Assignee
POWELL RIVER Co Ltd
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 POWELL RIVER Co Ltd filed Critical POWELL RIVER Co Ltd
Publication of GB765690A publication Critical patent/GB765690A/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
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/063—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods using grinding devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

765,690. Grinding wood. POWELL RIVER CO., Ltd. May 10, 1954 [Jan. 27, 1954], No. 13591/54. Class 59 [Also in Group VIII] To reduce the energy required for grinding wood, e.g. blocks 16 to form paper pulp, a solution of a sulphite or bisulphite of sodium, ammonia, potassium, magnesium, aluminium, rubidium, lithium, or cesium, or of a carbonate or bicarbonate of sodium, ammonia, or potassium, or calcium bisulphite or a mixture thereof is added, e.g. through a pipe 18 to a grindstone 11 mounted in a pit 10. Up to 10 per cent of chemical, on the weight of the wood, may be used.
GB13591/54A 1954-01-27 1954-05-10 Improvements in or relating to a process of producing groundwood pulp Expired GB765690A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US765690XA 1954-01-27 1954-01-27

Publications (1)

Publication Number Publication Date
GB765690A true GB765690A (en) 1957-01-09

Family

ID=22132847

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13591/54A Expired GB765690A (en) 1954-01-27 1954-05-10 Improvements in or relating to a process of producing groundwood pulp

Country Status (1)

Country Link
GB (1) GB765690A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2901943A1 (en) * 1979-01-19 1980-07-24 Voith Gmbh J M METHOD FOR PRODUCING WOOD GRIND

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2901943A1 (en) * 1979-01-19 1980-07-24 Voith Gmbh J M METHOD FOR PRODUCING WOOD GRIND
FR2446885A1 (en) * 1979-01-19 1980-08-14 Voith Gmbh PROCESS FOR THE PREPARATION OF WOOD PULP BY DEFIBRATION

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