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GB1133662A - Process and apparatus for use in the manufacture of fibre pulp from lignocellulose containing materials - Google Patents

Process and apparatus for use in the manufacture of fibre pulp from lignocellulose containing materials

Info

Publication number
GB1133662A
GB1133662A GB477366A GB477366A GB1133662A GB 1133662 A GB1133662 A GB 1133662A GB 477366 A GB477366 A GB 477366A GB 477366 A GB477366 A GB 477366A GB 1133662 A GB1133662 A GB 1133662A
Authority
GB
United Kingdom
Prior art keywords
pressure
cooking
hydraulic pressure
liquid
steaming
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
GB477366A
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 GB1133662A publication Critical patent/GB1133662A/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/10—Physical methods for facilitating impregnation

Landscapes

  • Paper (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

1,133,662. Treating wood pulp. DEFIBRATOR A.B. 3 Feb., 1966 [11 Feb., 1965], No. 4773/66. Heading D2W. Fibre pulp is produced by steaming lignocellulose material (chips), impregnating with a chemical-containing liquid under a high hydraulic pressure that is greater than the superatmospheric pressure used in a subsequent cooking stage in steam and/or liquid phase, reducing the pressure to that in the cooking vessel, then cooking the pulp at the superatmospheric pressure. The high hydraulic pressure is applied whilst the material is in a compartment which forms part of a sluice device and which is separated from the steaming vessel and the cooking vessel. The hydraulic pressure can be 50kg/cm<SP>2</SP> or more. There may be a first impregnation with the chemicalcontaining liquid at a pressure lower than the high hydraulic pressure at a time after the steaming but prior to the impregnation under the hydraulic pressure. The impregnating liquid pumped to the compartment in the sluice valve may have a temperature of less than 100‹C. The material exposed to the high hydraulic pressure may sink, due to its increased specific weight, through the impregnating liquid to an outlet channel connected to the cooking vessel. There may be a second cooking stage using the same or different liquid. After cooking the material may be cooled with water before rleas of the pressure used during cooking. Steaming may be for 2-20 minutes at up to 130‹C at 5-10 kg/cm<SP>2</SP> pressure. Cooking in the presence of steam may be under 5-10 kg/cm<SP>2</SP> pressure.
GB477366A 1965-02-11 1966-02-03 Process and apparatus for use in the manufacture of fibre pulp from lignocellulose containing materials Expired GB1133662A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE180065A SE308443B (en) 1965-02-11 1965-02-11

Publications (1)

Publication Number Publication Date
GB1133662A true GB1133662A (en) 1968-11-13

Family

ID=20258861

Family Applications (1)

Application Number Title Priority Date Filing Date
GB477366A Expired GB1133662A (en) 1965-02-11 1966-02-03 Process and apparatus for use in the manufacture of fibre pulp from lignocellulose containing materials

Country Status (10)

Country Link
BE (1) BE676193A (en)
CH (1) CH442957A (en)
CS (1) CS154213B2 (en)
DE (1) DE1288418B (en)
FI (1) FI44189C (en)
FR (1) FR1467414A (en)
GB (1) GB1133662A (en)
NL (1) NL6601745A (en)
NO (1) NO119204B (en)
SE (1) SE308443B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161330A1 (en) * 1984-05-01 1985-11-21 Oliver Armas Laakso Chip presteaming and air washing
EP2897925B1 (en) 2012-09-19 2017-04-05 Andritz, Inc. Method and apparatus for adding steam for a steam explosion pretreatment process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2632782C2 (en) * 1976-07-21 1982-12-30 Hans Dipl.-Ing. 7758 Meersburg Knauth Method and device for the continuous impregnation of fibrous materials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE304214C (en) * 1916-10-19
US2885317A (en) * 1954-03-30 1959-05-05 Stora Kopparbergs Bergslags Ab Method in manufacturing chemical or semi-chemical pulp from heavily resinous wood

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161330A1 (en) * 1984-05-01 1985-11-21 Oliver Armas Laakso Chip presteaming and air washing
US4632729A (en) * 1984-05-01 1986-12-30 Laakso Oliver A Chip presteaming and air washing
EP2897925B1 (en) 2012-09-19 2017-04-05 Andritz, Inc. Method and apparatus for adding steam for a steam explosion pretreatment process

Also Published As

Publication number Publication date
SE308443B (en) 1969-02-10
BE676193A (en) 1966-08-08
DE1288418B (en) 1969-01-30
FI44189B (en) 1971-06-01
NL6601745A (en) 1966-08-12
FR1467414A (en) 1967-01-27
CS154213B2 (en) 1974-03-29
NO119204B (en) 1970-04-06
FI44189C (en) 1971-09-10
CH442957A (en) 1967-08-31

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Legal Events

Date Code Title Description
FG4C Corrections for granted european patens

Free format text: THE EXPECTED DATE OF GRANT IS NOW THE 20030502 WHICH WILL BE PUBLISHED IN THE EUROPEAN PATENT BULLETIN 03/18.