GB822440A - A method for producing wood pulp - Google Patents

A method for producing wood pulp

Info

Publication number
GB822440A
GB822440A GB5445/58A GB544558A GB822440A GB 822440 A GB822440 A GB 822440A GB 5445/58 A GB5445/58 A GB 5445/58A GB 544558 A GB544558 A GB 544558A GB 822440 A GB822440 A GB 822440A
Authority
GB
United Kingdom
Prior art keywords
wood pulp
refined
rejects
chips
mechanical
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
GB5445/58A
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.)
Bauer Brothers Co
Original Assignee
Bauer Brothers Co
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 Bauer Brothers Co filed Critical Bauer Brothers Co
Publication of GB822440A publication Critical patent/GB822440A/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
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/023—Cleaning wood chips or other raw materials
    • 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

Landscapes

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

Abstract

822,440. Preparation of wood pulp. BAUER BROS. CO. Feb. 19, 1958 [March 7, 1957], No. 5445/58. Drawings to Specification. Class 96. In the production of wood pulp by mechanical or by chemi-mechanical methods, the raw wood is chipped, refined in one or more stages using rotating, abrading discs, the refined material is screened, and passed through one or more centrifugal cleaners. In one form, the rejects from screening are returned for further treatment in the second of two refiners, rejects from the centrifugal cleaner going to waste. In other forms, the chips are subjected to, e.g., sodium sulphite solution at 100 lb. per sq. inch hydrostatic pressure, after which they are drained &c. with the aid of a bin having a perforated metal bottom with conveyers for moving the chips, which then pass through a continuous screw-press before being refined &c.
GB5445/58A 1957-03-07 1958-02-19 A method for producing wood pulp Expired GB822440A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US822440XA 1957-03-07 1957-03-07

Publications (1)

Publication Number Publication Date
GB822440A true GB822440A (en) 1959-10-28

Family

ID=22169951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5445/58A Expired GB822440A (en) 1957-03-07 1958-02-19 A method for producing wood pulp

Country Status (1)

Country Link
GB (1) GB822440A (en)

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