DE541303C - Process for the production of a low-viscosity viscose solution for the manufacture of rayon - Google Patents

Process for the production of a low-viscosity viscose solution for the manufacture of rayon

Info

Publication number
DE541303C
DE541303C DEST40928D DEST040928D DE541303C DE 541303 C DE541303 C DE 541303C DE ST40928 D DEST40928 D DE ST40928D DE ST040928 D DEST040928 D DE ST040928D DE 541303 C DE541303 C DE 541303C
Authority
DE
Germany
Prior art keywords
production
low
manufacture
rayon
viscose solution
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
DEST40928D
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.)
ZELLSTOFF und PAPIERFABRIKATIO
MAX STEINSCHNEIDER DIPL ING
Original Assignee
ZELLSTOFF und PAPIERFABRIKATIO
MAX STEINSCHNEIDER DIPL ING
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 ZELLSTOFF und PAPIERFABRIKATIO, MAX STEINSCHNEIDER DIPL ING filed Critical ZELLSTOFF und PAPIERFABRIKATIO
Priority to DEST40928D priority Critical patent/DE541303C/en
Application granted granted Critical
Publication of DE541303C publication Critical patent/DE541303C/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
    • D01F2/08—Composition of the spinning solution or the bath

Description

Verfahren zur Herstellung einer niedrigviscosen Viscoselösung für die Kunstseidefabrikation Die Erfindung bezieht sich auf ein vereinfachtes Verfahren zur Herstellung einer Viscoselösung für die Kunstseidefabrikation von sehr geringer Viscosität.Process for the preparation of a low-viscosity viscose solution for artificial silk manufacture The invention relates to a simplified method for the production of a viscose solution for the rayon production of very low Viscosity.

Bei der Herstellung von Kunstseide nach dem Viscoseverfahren wird für gewisse Sorten Seide als Ausgangsmaterial eine Cellulose verlangt, deren Viscoselösungen ohne Vorreife der Alkalicellulose direkt nach dem Lösen eine sehr geringe Viscosität besitzen.The viscose process is used in the manufacture of rayon For certain types of silk, a cellulose is required as the starting material, its viscose solutions Without pre-ripening of the alkali cellulose, a very low viscosity directly after dissolving own.

Um einen derartigen Zellstoff herzustellen, war es bisher nötig, im Kochprozeß bereits das Lignin weitgehendst zu entfernen, was gleichzeitig mit bedeutenden Verlusten an Cellulose durch Abbau verbunden ist.To produce such a pulp, it was previously necessary to im Cooking process already largely remove the lignin, which is also significant Cellulose loss due to degradation is linked.

Es hat sich nun herausgestellt, daß es möglich ist, einen Zellstoff mit den gewünschten Eigenschaften aus normal gekochter Cellulose herzustellen, dadurch, daß man in an sich bekannter Weise an die Chlorbleiche, die nicht bis zur vollen Weiße durchgeführt wird, eine Nachbleiche mit einem sauerstoffabgebenden Bleichmittel in alkalischer Lösung anschließt. Es werden auf diese Weise Zellstoffe erhalten, die bei der normalen Zusammensetzung der Viscoselösung (7010 Zellstoff, 60;o Natronlauge) eine Viscosität nach C o c h i u s von 2o Sekunden aufweisen, eine Viscosität, die bei anders vorbehandelten Zellstoffen bisher nicht zu erreichen war. Beispiel Zellstoff, der einen Chlorverbrauch von 5% Chlor hat, wird mit annähernd 8o% des nötigen Chlors vorgebleicht. Nach dem gründlichen Abziehen der Holländerflüssigkeit wird noch i kg Natriumsuperoxyd und i kg -Natriumsilikat pro iookg Zellstoff zugegeben und fertiggebleicht. Der gebleichte Zellstoff wird in üblicher Weise, jedoch ohne Vorreife der Alkalicellulose auf Viscase verarbeitet.It has now been found that it is possible to use a pulp to produce with the desired properties from normal cooked cellulose, thereby that one can use chlorine bleaching in a manner known per se, which is not up to the full Whiteness is carried out, followed by bleaching with an oxygen-releasing bleach in an alkaline solution. In this way pulps are obtained, those with the normal composition of the viscose solution (7010 cellulose, 60; o caustic soda) have a viscosity according to C o c h i u s of 20 seconds, a viscosity which was previously not achievable with otherwise pretreated pulps. Example pulp, which has a chlorine consumption of 5% chlorine, is with approximately 80% of the necessary chlorine pre-bleached. After the Dutch liquid has been thoroughly drawn off, i kg of sodium peroxide and 1 kg of sodium silicate are added per 1 ounce of cellulose and bleached. The bleached cellulose is processed in the usual way, but without the alkali cellulose being pre-ripened processed on Viscase.

Man hat zwar bereits vorgeschlagen, beim Bleichen von Papierstoffen mit Superoxyden auch noch eine Chlorung vorzunehmen. Dieses Verfahren hat aber mit dem vorliegenden nichts zu tun, weil sich aus ihm nicht die Eignung eines in der angegebenen Weise behandelten Zellstoffes als Ausgangsmaterial für Cellulosexanthogenat ergibt.It has already been proposed in the bleaching of paper stocks chlorination with superoxides. But this procedure has with nothing to do with the present because it does not result in the suitability of one in the indicated manner treated pulp as a starting material for cellulose xanthate results.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer niedrigviscosen Viscoselösung für die Kunstseidefabrikation, dadurch gekennzeichnet, daß als Ausgangsmaterial Zellstoff benutzt wird, der nach unvollständiger Bleichung mit Chlor einer Nachbleiche durch ein sauerstoffabgebendes Bleichmittel in alkalischer Lösung unterworfen wurde.PATENT CLAIM: Process for the production of a low-viscosity viscose solution for artificial silk manufacture, characterized in that as the starting material Pulp is used, which is re-bleached after incomplete bleaching with chlorine was subjected to an oxygen-releasing bleach in an alkaline solution.
DEST40928D 1926-04-28 1926-04-28 Process for the production of a low-viscosity viscose solution for the manufacture of rayon Expired DE541303C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEST40928D DE541303C (en) 1926-04-28 1926-04-28 Process for the production of a low-viscosity viscose solution for the manufacture of rayon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST40928D DE541303C (en) 1926-04-28 1926-04-28 Process for the production of a low-viscosity viscose solution for the manufacture of rayon

Publications (1)

Publication Number Publication Date
DE541303C true DE541303C (en) 1932-01-06

Family

ID=7463844

Family Applications (1)

Application Number Title Priority Date Filing Date
DEST40928D Expired DE541303C (en) 1926-04-28 1926-04-28 Process for the production of a low-viscosity viscose solution for the manufacture of rayon

Country Status (1)

Country Link
DE (1) DE541303C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973632C (en) * 1950-06-30 1960-04-21 Fmc Corp Process for bleaching wood pulp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973632C (en) * 1950-06-30 1960-04-21 Fmc Corp Process for bleaching wood pulp

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