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DE353105C - Process for the production of wood pulp - Google Patents

Process for the production of wood pulp

Info

Publication number
DE353105C
DE353105C DE1921353105D DE353105DD DE353105C DE 353105 C DE353105 C DE 353105C DE 1921353105 D DE1921353105 D DE 1921353105D DE 353105D D DE353105D D DE 353105DD DE 353105 C DE353105 C DE 353105C
Authority
DE
Germany
Prior art keywords
wood
wood pulp
production
steamed
treated
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
DE1921353105D
Other languages
German (de)
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
Application granted granted Critical
Publication of DE353105C publication Critical patent/DE353105C/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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes

Landscapes

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

Description

Verfahren zur Herstellung von Holzstoff. Versuche, Holzschliff aus gedämpftem Holz - sogenannten Braunschliff - zu bleichen, haben wegen des ungenügenden Ergebnisses und der hohen Kosten nicht zu dauernder Anwendung führen können. Dagegen sind Verfahren üblich, Schliff aus rohem Holz unmittelbar auf den Entwässerungsmaschinen zu bleichen.Process for the production of wood pulp. Try wood pulp off Steamed wood - so-called brown sanding - have to be bleached because of the insufficient Result and the high costs cannot lead to permanent use. Against it procedures are common, grinding from raw wood directly on the drainage machines to bleach.

Man kann aber auch gemäß der Erfindung weißen und sehr hellen Holzschliff aus vorgedämpftem, gegebenenfalls auch aus rohem Holz herstellen, wenn man das Schleifholz unmittelbar nach dem Dämpfen oder Kochen im Kocher selbst mit Bleichmitteln behandelt, indem man es beispielsweise mit Bleichflüssigkeiten völlig durchtränkt und nachher verschleift.But you can also use white and very light wood pulp according to the invention from pre-steamed wood, if necessary also from raw wood, if you use the sanding wood treated with bleach immediately after steaming or cooking in the stove itself, for example by soaking it completely with bleaching liquids and afterwards looped.

Eine vollkommene Durchtränkung mit diesen Flüssigkeiten erzielt man beispielsweise, wenn das Behandlungsgefäß längere Zeit luftleer gemacht und dann eine wäßrige Lösung eines Bleichmittels unter Druck eingepumpt wird. Eine sehr wirtschaftliche Arbeitsweise besteht darin, daß mit einer Bleichflüssigkeit fast völlig gesättigte, angewärmte Luft eingepreßt wird. Auch unmittelbar gasförmige Bleichmittel sind anwendbar.Complete saturation with these liquids is achieved for example, if the treatment vessel is evacuated for a long time and then an aqueous solution of a bleaching agent is pumped in under pressure. A very economical one The way it works is that with a bleaching liquid almost completely saturated, warmed air is injected. Directly gaseous bleaches can also be used.

Haben wässerige Lösungen von sauren schwefligsauren Salzen, beispielsweise Natriumbisulfit, welches sehr geeignet ist, als Bleichmittel gedient, so muß das behandelte Holz zur Auswirkung der Behandlung mehrere Tage liegengelassen werden, ehe es zerfasert wird. Dabei werden auch die Inkrusten aufgeweicht, so daß namentlich beim Heißschleifen, auch bei gebleichtem rohen Holze ein sehr zäher Faserstoff erzeugt werden kann. Das Holz kann auch in vorzerkleinertem Zustande nach dem neuen Verfahren gebleicht und nachher auf jede andere Art weiter zerfasert werden.Have aqueous solutions of acidic sulfuric acid salts, for example Sodium bisulfite, which is very suitable as a bleaching agent, must be treated wood is left for several days to allow the treatment to take effect, before it is frayed. The incrustations are also softened, so that by name when hot grinding, even with bleached raw wood, a very tough fiber material is produced can be. The wood can also be pre-shredded using the new process bleached and then further frayed in any other way.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Holzstoff, dadurch gekennzeichnet, daß das Holz vor dem Schleifen unmittelbar nach dem Kochen, Dämpfen o. dgl. im Kocher selbst oder ungekocht in einem geschlossenen Gefäß mit Bleichmitteln behandelt wird. PATENT CLAIM: Process for the production of wood pulp, characterized in that the wood is treated with bleaching agents in the stove itself or uncooked in a closed vessel immediately after it has been cooked, steamed or the like.
DE1921353105D 1921-07-16 1921-07-16 Process for the production of wood pulp Expired DE353105C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE353105T 1921-07-16

Publications (1)

Publication Number Publication Date
DE353105C true DE353105C (en) 1922-05-18

Family

ID=6279780

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1921353105D Expired DE353105C (en) 1921-07-16 1921-07-16 Process for the production of wood pulp

Country Status (1)

Country Link
DE (1) DE353105C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007994A1 (en) * 1990-10-24 1992-05-14 Beloit Corporation Pulping process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007994A1 (en) * 1990-10-24 1992-05-14 Beloit Corporation Pulping process

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