DE309259C - - Google Patents

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Publication number
DE309259C
DE309259C DENDAT309259D DE309259DA DE309259C DE 309259 C DE309259 C DE 309259C DE NDAT309259 D DENDAT309259 D DE NDAT309259D DE 309259D A DE309259D A DE 309259DA DE 309259 C DE309259 C DE 309259C
Authority
DE
Germany
Prior art keywords
alkali
takes place
stronger
weaker
cooking temperature
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
DENDAT309259D
Other languages
German (de)
Publication of DE309259C publication Critical patent/DE309259C/de
Active legal-status Critical Current

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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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes
    • D21C3/266—Multistage processes the same pulping agent being used in all stages
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes

Landscapes

  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Paper (AREA)

Description

DEUTSCHES REICHGERMAN EMPIRE

AUSGEGEBEN ABi 2; OKTOBER 1920ISSUED ABi 2; OCTOBER 1920

REICH S PATENTAMTREICH S PATENT OFFICE

PATENTSCHRIFTPATENT LETTERING

Vr 309259 KLASSE 55 b GRUPPE I ΑΠ "'iff Vr 309259 CLASS 55 b GROUP I ΑΠ "'iff

Dr. Heinrich Oexmann in Berlin. Verfahren zur Herstellung von Zellulose nach Patent 306325. Dr. Heinrich Oexmann in Berlin. Process for the production of cellulose according to patent 306325.

Zusatz zum Patent 306325.Addendum to patent 306325.

Patentiert im Deutschen Reiche vom 25. Mai 1918 ab. Längste Dauer: 30. Juli 1932.Patented in the German Empire on May 25, 1918. Longest duration: July 30, 1932.

In gleicher Weise, wie gemäß dem A^erfahren des Hauptpatents 306325 die Aufschließung mit Hilfe von zunächst schwächeren und dann stärkeren Alkalien durch Kochung erfolgt, läßt sich diese auch dadurch erreichen, daß die Behandlung mit dem schwächeren oder mit dem stärkeren Alkali oder mit beiden nicht bei Kochtemperatur, sondern bei einer Temperatur erfolgt, die unter der j eweiligen Kochtemperatur liegt.In the same way as experienced according to the A ^ of the main patent 306325 the digestion with the help of initially weaker and then stronger alkalis by boiling takes place, this can also be achieved by treating with the weaker or with the stronger alkali or with both not at cooking temperature, but at takes place at a temperature which is below the respective Cooking temperature is.

Claims (1)

Patent-Anspruch:Patent claim: Verfahren zur Herstellung von Zellulose nach Patent 306325, dadurch gekennzeichnet, daß die Behandlung des auf zuschließenden Rohmaterials mit dem schwächeren Alkali oder mit dem stärke-■ ren Alkali oder mit beiden bei unter Kochtemperatur liegenden Temperaturen erfolgt. aoProcess for the production of cellulose according to patent 306325, characterized in that, that the treatment of the raw material to be closed with the weaker alkali or with the stronger ■ alkali or with both at below Cooking temperature lying temperatures takes place. ao
DENDAT309259D Active DE309259C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE309259T

Publications (1)

Publication Number Publication Date
DE309259C true DE309259C (en)

Family

ID=32932651

Family Applications (2)

Application Number Title Priority Date Filing Date
DENDAT306325D Active DE306325C (en)
DENDAT309259D Active DE309259C (en)

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DENDAT306325D Active DE306325C (en)

Country Status (1)

Country Link
DE (2) DE309259C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE956644C (en) * 1944-04-01 1957-01-24 Arne Johan Arthur Asplund Dipl Device and method for fiberizing lignocellulose-containing fiber material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE956644C (en) * 1944-04-01 1957-01-24 Arne Johan Arthur Asplund Dipl Device and method for fiberizing lignocellulose-containing fiber material

Also Published As

Publication number Publication date
DE306325C (en)

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