GB741980A - Improvements in the manufacture of pulp from fibrous ligno-cellulose-containing materials - Google Patents

Improvements in the manufacture of pulp from fibrous ligno-cellulose-containing materials

Info

Publication number
GB741980A
GB741980A GB33867/54A GB3386754A GB741980A GB 741980 A GB741980 A GB 741980A GB 33867/54 A GB33867/54 A GB 33867/54A GB 3386754 A GB3386754 A GB 3386754A GB 741980 A GB741980 A GB 741980A
Authority
GB
United Kingdom
Prior art keywords
subjected
impregnated
chemicals
conveyer
tube
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
GB33867/54A
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.)
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
Publication of GB741980A publication Critical patent/GB741980A/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
    • 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
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

Fibrous ligno-cellulosic material is subjected to mechanical compression and the compressed material is allowed to expand in a liquid containing chemicals required for a subsequent treatment so that the liquid is sucked into the pores of the material; the impregnated material is then subjected to a chemical treatment for facilitating the separation of the fibres in an atmosphere of steam at a temperature above <PICT:0741980/IV(a)/1> 100 DEG C., preferably between 150 DEG and 220 DEG C., and for a period of at least 5 minutes, in the presence of chemicals having a neutralizing effect on organic acids formed in the treatment; the material is then subjected to mechanical defibration so as to obtain cellulose pulp. As shown, wood chips fall from hopper 210 into a conveyer shoot 211 which is vibrated so as to cause the chips to move along to the feed opening of a compressor. This device comprises a tapering casing 220 containing a rotatable screw 222 and merging on the discharge side of the screw into a tube 221 of gradually increasing diameter. This tube is joined to tube 223 which is provided with a hinged flap 224. A duct 225, enclosing tube 223, opens into a long inclined conveyer casing 20 which contains a solution of the chemicals with which the chips are to be treated. The compressed chip material on entering the duct 225 absorbs the solution and becomes thoroughly impregnated. The conveyer 22 feeds the chip material upwardly above the level 16 of the liquid to the discharge shoot 25. The material may be impregnated with a solution of sodium hydroxide, sodium hydrosulphite or a mixture of these chemicals. The impregnated chip material from the shoot 25 is then passed into a chamber (not shown) in which it is heated in an atmosphere of high-pressure steam for a period of at least 5 minutes, e.g. 10-20 minutes. This treatment chamber may be provided with a feed screw which has to work against a considerable counter-pressure so that part of the chemical-containing liquid absorbed is then squeezed out of the chip material. The chemically-treated material is then subjected to mechanical defibration. The device for compressing the chip material may be in the form of a reciprocating plunger instead of a rotary screw conveyer.
GB33867/54A 1951-03-22 1952-03-21 Improvements in the manufacture of pulp from fibrous ligno-cellulose-containing materials Expired GB741980A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE741980X 1951-03-22
SE313780X 1951-03-22

Publications (1)

Publication Number Publication Date
GB741980A true GB741980A (en) 1955-12-14

Family

ID=32965055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33867/54A Expired GB741980A (en) 1951-03-22 1952-03-21 Improvements in the manufacture of pulp from fibrous ligno-cellulose-containing materials

Country Status (2)

Country Link
FR (1) FR1061813A (en)
GB (1) GB741980A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920010A (en) * 1956-11-05 1960-01-05 Voiret Eugene Gilbert Manufacture of wood pulp
DE1101126B (en) * 1957-11-05 1961-03-02 Bauer Bros Co Process and apparatus for the impregnation of pulp-containing raw materials during the continuous extraction of semi-pulps
WO2013141776A1 (en) * 2012-03-23 2013-09-26 Metso Paper Sweden Ab Method and arrangement for cleaning of lignocellulosic materials during impregnation
RU2763085C1 (en) * 2021-05-24 2021-12-27 Дмитрий Игоревич Шварцман Method for obtaining pulp from woodworking industry waste and device for its implementation
WO2023282794A1 (en) * 2021-07-08 2023-01-12 Сергей Геннадьевич ШИРОГОРОВ Folding knife

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1104810B (en) * 1957-01-14 1961-04-13 Condi Engineering Corp Device for the continuous digestion of lignocellulosic material
US4632729A (en) * 1984-05-01 1986-12-30 Laakso Oliver A Chip presteaming and air washing

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920010A (en) * 1956-11-05 1960-01-05 Voiret Eugene Gilbert Manufacture of wood pulp
DE1101126B (en) * 1957-11-05 1961-03-02 Bauer Bros Co Process and apparatus for the impregnation of pulp-containing raw materials during the continuous extraction of semi-pulps
WO2013141776A1 (en) * 2012-03-23 2013-09-26 Metso Paper Sweden Ab Method and arrangement for cleaning of lignocellulosic materials during impregnation
RU2763085C1 (en) * 2021-05-24 2021-12-27 Дмитрий Игоревич Шварцман Method for obtaining pulp from woodworking industry waste and device for its implementation
WO2022250577A1 (en) * 2021-05-24 2022-12-01 Дмитрий Игоревич ШВАРЦМАН Method for producing pulp from wood processing industry waste
WO2023282794A1 (en) * 2021-07-08 2023-01-12 Сергей Геннадьевич ШИРОГОРОВ Folding knife

Also Published As

Publication number Publication date
FR1061813A (en) 1954-04-15

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