DE352962C - Process for the pretreatment of cellulose for the production of easily filterable viscose - Google Patents
Process for the pretreatment of cellulose for the production of easily filterable viscoseInfo
- Publication number
- DE352962C DE352962C DE1920352962D DE352962DA DE352962C DE 352962 C DE352962 C DE 352962C DE 1920352962 D DE1920352962 D DE 1920352962D DE 352962D A DE352962D A DE 352962DA DE 352962 C DE352962 C DE 352962C
- Authority
- DE
- Germany
- Prior art keywords
- cellulose
- production
- viscose
- pretreatment
- alkali
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/08—Alkali cellulose
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Artificial Filaments (AREA)
- Jellies, Jams, And Syrups (AREA)
Description
Es ist bekannt, daß bei der Herstellung von Viskose zwecks weiterer Herstellung glänzender Fäden, Filme usw. aus- dieser die Behandlung der Zellulose mit Alkalilauge einer der wichtigsten Vorgänge ist. Eine schlecht mit Alkalilauge durchtränkte Zellulose ergibt eine mit ungelösten Zellulosefasern verunreinigte Viskose. Die ungelösten durch Alkali gelatinierten Fasern erschweren außerordentlich das Filtrieren derartiger Viskosen und machen es oft unmöglich. Unfiltrierte Viskosen lassen sich aber nicht zu Fäden verspinnen. Die Ursache des schlechten Eindringens der Alkalilauge in die einzelnen Fasern und deren Zellen ist die Anwesenheit von Luft, die außerordentlich schwer durch Alkalilauge verdrängt wird. Deswegen wird in der Praxis die Zellulose längere Zeit, z. B. etwa 1V2 Stunden, mit der Alkalilauge behandelt.It is known that in the production of viscose for the purpose of further production of shiny threads, films, etc. from this, one of the most important processes is the treatment of the cellulose with alkali. Cellulose poorly saturated with alkali lye results in viscose contaminated with undissolved cellulose fibers. The undissolved fibers gelatinized by alkali make it extremely difficult to filter such viscose and often make it impossible. However, unfiltered viscose cannot be spun into threads. The cause of the poor penetration of the alkali lye into the individual fibers and their cells is the presence of air, which is extremely difficult to displace by the alkali lye. Therefore, in practice, the cellulose is used for a long time, e.g. B. about 1V 2 hours, treated with the alkali.
Der große Übelstand des langsamen Eindringens der Alkalilauge in die Zellulose wird nach dem vorliegenden Verfahren vollständig behoben, indem man vor und im Laufe des Tauchens die Zellulose oder das Gefäß, in dem diese mit Alkalilauge behandelt wird, stark evakuiert. Man erhält so gleichmäßig mit Alkalilauge durchtränkte Zellulose, auch erfordert das Verfahren viel weniger Zeit als das übliche. Der große Vorzug des Verfahrens vor den bekannten ist, daß es etwa dreimal so schnell ausgeführt werden kann, besonders aber, daß die aus so behandelten Zellulosen erhaltenen Viskosen keine ungelösten Fasern enthalten und sich sehr leicht filtrieren lassen. Die Herstellung der Viskose erfolgt in der üblichen Weise.The great disadvantage of the slow penetration of the alkali lye into the cellulose becomes according to the present procedure completely remedied by looking before and during the Dipping the cellulose or the vessel in which it is treated with alkali is strong evacuated. In this way, cellulose is obtained that is evenly saturated with alkali, even if required the procedure much less time than the usual. The great virtue of the procedure over the known is that it can be done about three times as fast, but especially that the viscose obtained from celluloses treated in this way does not contain any undissolved fibers and can be filtered very easily. The production of viscose takes place in the usual way Way.
Claims (1)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR522182T | 1920-01-10 | ||
DE352962T | 1920-01-21 | ||
GB2056/20A GB167199A (en) | 1920-01-10 | 1920-01-22 | Improvements in processes for the treatment of viscose |
CH86848T | 1920-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE352962C true DE352962C (en) | 1922-05-09 |
Family
ID=40361485
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1920352962D Expired DE352962C (en) | 1920-01-10 | 1920-01-21 | Process for the pretreatment of cellulose for the production of easily filterable viscose |
DE1920353948D Expired DE353948C (en) | 1920-01-10 | 1920-01-21 | Process for the pretreatment of cellulose for the production of easily filterable viscose |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1920353948D Expired DE353948C (en) | 1920-01-10 | 1920-01-21 | Process for the pretreatment of cellulose for the production of easily filterable viscose |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH86848A (en) |
DE (2) | DE352962C (en) |
FR (2) | FR522182A (en) |
GB (2) | GB167199A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2530403A (en) * | 1946-11-21 | 1950-11-21 | Stewart E Seaman | Continuous xanthation |
US2592355A (en) * | 1949-11-21 | 1952-04-08 | Tachikawa Shozo | Process for manufacturing macromolecular cellulose fiber |
-
1920
- 1920-01-10 FR FR522182A patent/FR522182A/en not_active Expired
- 1920-01-21 DE DE1920352962D patent/DE352962C/en not_active Expired
- 1920-01-21 DE DE1920353948D patent/DE353948C/en not_active Expired
- 1920-01-22 CH CH86848D patent/CH86848A/en unknown
- 1920-01-22 GB GB2056/20A patent/GB167199A/en not_active Expired
- 1920-02-02 GB GB3116/20A patent/GB167201A/en not_active Expired
- 1920-02-10 FR FR23053A patent/FR23053E/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR23053E (en) | 1921-10-03 |
CH86848A (en) | 1920-10-16 |
GB167199A (en) | 1921-07-22 |
GB167201A (en) | 1921-08-02 |
DE353948C (en) | 1922-05-27 |
FR522182A (en) | 1921-07-27 |
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