DE237081C - - Google Patents

Info

Publication number
DE237081C
DE237081C DENDAT237081D DE237081DA DE237081C DE 237081 C DE237081 C DE 237081C DE NDAT237081 D DENDAT237081 D DE NDAT237081D DE 237081D A DE237081D A DE 237081DA DE 237081 C DE237081 C DE 237081C
Authority
DE
Germany
Prior art keywords
acid solution
soda
acid
sawdust
chopped
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.)
Active
Application number
DENDAT237081D
Other languages
German (de)
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.)
Publication of DE237081C publication Critical patent/DE237081C/de
Active 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

Description

GEDRÜCKf IN D£r REICHS DRUCKEREI.PRINTED IN THE REICHS PRINTING COMPANY.

Claims (1)

Patent-Anspruch:Patent claim: Verfahren zur Gewinnung von Zellulose aus Sägespänen oder zerstückeltem Holz, dadurch gekennzeichnet, daß die Späne vor dem üblichen Kochen unter Druck mit ätzender Soda- oder Säurelösung einer Vorbehandlung in einem offenen Behälter in einer nicht ätzenden Soda- oder Säurelösung (ζ. Β. schweflige Säure) so lange unterzogen werden, bis die Masse etwa die Hälfte ihres Gewichtes verloren hat.Process for the production of cellulose from sawdust or chopped up wood, characterized in that the chips before the usual cooking under pressure with a caustic soda or acid solution Pretreatment in an open container in a non-corrosive soda or acid solution (ζ. Β. sulphurous acid) until the mass is about the Has lost half of her weight.
DENDAT237081D 1909-12-13 Active DE237081C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190929118T 1909-12-13

Publications (1)

Publication Number Publication Date
DE237081C true DE237081C (en)

Family

ID=32559284

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT237081D Active DE237081C (en) 1909-12-13

Country Status (3)

Country Link
DE (1) DE237081C (en)
FR (1) FR420640A (en)
GB (1) GB190929118A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747455C (en) * 1940-07-02 1944-10-02 Sueddeutsche Zellwolle Ag Process for the pretreatment of flax and hemp shavings
DE1005824B (en) * 1952-02-15 1957-04-04 Procel S A Soc Process for the production of cellulose rich in alphacellulose, low in pentosan

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747455C (en) * 1940-07-02 1944-10-02 Sueddeutsche Zellwolle Ag Process for the pretreatment of flax and hemp shavings
DE1005824B (en) * 1952-02-15 1957-04-04 Procel S A Soc Process for the production of cellulose rich in alphacellulose, low in pentosan

Also Published As

Publication number Publication date
FR420640A (en) 1911-02-03
GB190929118A (en) 1910-12-13

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