SE308443B - - Google Patents

Info

Publication number
SE308443B
SE308443B SE180065A SE180065A SE308443B SE 308443 B SE308443 B SE 308443B SE 180065 A SE180065 A SE 180065A SE 180065 A SE180065 A SE 180065A SE 308443 B SE308443 B SE 308443B
Authority
SE
Sweden
Prior art keywords
pressure
cooking
hydraulic pressure
liquid
steaming
Prior art date
Application number
SE180065A
Inventor
A Asplund
R Reinhall
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
Priority to SE180065A priority Critical patent/SE308443B/xx
Priority to NO16154066A priority patent/NO119204B/no
Priority to DE1966D0049281 priority patent/DE1288418B/en
Priority to GB477366A priority patent/GB1133662A/en
Priority to FR48436A priority patent/FR1467414A/en
Priority to BE676193D priority patent/BE676193A/xx
Priority to FI31566A priority patent/FI44189C/en
Priority to CS85766A priority patent/CS154213B2/cs
Priority to CH188666A priority patent/CH442957A/en
Priority to NL6601745A priority patent/NL6601745A/xx
Publication of SE308443B publication Critical patent/SE308443B/xx

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.
SE180065A 1965-02-11 1965-02-11 SE308443B (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
SE180065A SE308443B (en) 1965-02-11 1965-02-11
NO16154066A NO119204B (en) 1965-02-11 1966-02-02
DE1966D0049281 DE1288418B (en) 1965-02-11 1966-02-03 Process for the production of pulp on raw material containing lignocellulose
GB477366A GB1133662A (en) 1965-02-11 1966-02-03 Process and apparatus for use in the manufacture of fibre pulp from lignocellulose containing materials
FR48436A FR1467414A (en) 1965-02-11 1966-02-04 Method and apparatus for making a pulp from fibrous material containing lignocellulose
BE676193D BE676193A (en) 1965-02-11 1966-02-08
FI31566A FI44189C (en) 1965-02-11 1966-02-09 Method for making pulps from lignocellulosic feedstock
CS85766A CS154213B2 (en) 1965-02-11 1966-02-10
CH188666A CH442957A (en) 1965-02-11 1966-02-10 Process for the production of pulp from lignocellulose-containing raw material
NL6601745A NL6601745A (en) 1965-02-11 1966-02-11

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
SE308443B true SE308443B (en) 1969-02-10

Family

ID=20258861

Family Applications (1)

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

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)

Families Citing this family (3)

* 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
US4632729A (en) * 1984-05-01 1986-12-30 Laakso Oliver A Chip presteaming and air washing
US9856601B2 (en) 2012-09-19 2018-01-02 Andritz Inc. Method and apparatus for adding steam for a steam explosion pretreatment process

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

Also Published As

Publication number Publication date
BE676193A (en) 1966-08-08
DE1288418B (en) 1969-01-30
FI44189C (en) 1971-09-10
FR1467414A (en) 1967-01-27
GB1133662A (en) 1968-11-13
NL6601745A (en) 1966-08-12
FI44189B (en) 1971-06-01
CH442957A (en) 1967-08-31
NO119204B (en) 1970-04-06
CS154213B2 (en) 1974-03-29

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