DE505372C - Process to remunerate the sodium hydroxide solution used for the viscose process and produced in the electrolytic mercury process - Google Patents
Process to remunerate the sodium hydroxide solution used for the viscose process and produced in the electrolytic mercury processInfo
- Publication number
- DE505372C DE505372C DEH121848D DEH0121848D DE505372C DE 505372 C DE505372 C DE 505372C DE H121848 D DEH121848 D DE H121848D DE H0121848 D DEH0121848 D DE H0121848D DE 505372 C DE505372 C DE 505372C
- Authority
- DE
- Germany
- Prior art keywords
- viscose
- lye
- produced
- remunerate
- sodium hydroxide
- 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
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/28—Purification; Separation
- C01D1/32—Purification; Separation by absorption or precipitation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Description
Verfahren zur Vergütung der für den Viskoseprozeß benutzten, im elektrolytischen Quecksilberverfahren erzeugten Natronlauge Bei der Anwendung von chemisch reiner Natronlauge zur Herstellung von Viskoseseide treten bei der Filtration und im Spinnprozeß wesentliche Schwierigkeiten auf, welche darin bestellen, daß Filter und Spinndüsen Verstopfungen unterliegen durch mikroskopische Aggregate, welche äußerlich von normaler Viskose nicht zu unterscheiden sind. Diese Erscheinung tritt beispielsweise auf bei Verwendung einer Natronlauge, die nach dem elektrolytischen Quecksilberverfahren hergestellt ist, oder einer Lauge, die mittels des Quecksilberverfahrens aus Preßlauge der Viskosefabrikation regeneriert worden ist. Anfänglich hat man vermutet, daß diese Erscheinungen zurückzuführen seien auf unbekannte spezifische Veränderungen chemischer oder physikalischer Art, die die Lauge wiihrend des elektrolytischen Quecksilberverfahrens etwa erfahren haben sollte. Hierfür hat aber die analytische Untersuchung der Laugen keinen näheren Anhalt gegeben. Dagegen hat sich gezeigt, daß der erwähnte ti belstand vermieden werden kann, wenn man der auf die angegebene Art gewonnenen Natronlauge gewisse Stoffe zusetzt, die man bisher als Verunreinigungen angesehen hat. Als wirksame Stoffe haben sich Verbindungen des Kaliums, Natriums, Eisens und Mangans erwiesen. Dabei hat sich gezeigt, daß in gewissen Fällen einzelne der genannten Verbindungen, in anderen Fällen Gemische aus mehreren von ihnen (deren Zusammensetzung je nach den Umständen wechseln kann) die erstrebte Wirkung hervorbringen.Process for the compensation of the used for the viscose process, in the electrolytic Mercury processes produced caustic soda when using chemically pure Sodium hydroxide for the production of viscose silk occurs during filtration and in the spinning process substantial difficulties in ordering filters and spinnerets Blockages are subject to microscopic aggregates which are outwardly normal Viscose cannot be distinguished. This phenomenon occurs, for example when using a caustic soda that is produced according to the electrolytic mercury process is produced, or a lye, which by means of the mercury process from pressed lye the viscose production has been regenerated. Initially it was assumed that these phenomena are due to unknown specific changes chemical or physical nature that the alkali during the electrolytic Mercury process should have learned about. But the analytical Investigation of the alkalis gave no further clues. In contrast, it has been shown that the mentioned table can be avoided if one of the specified Kind of caustic soda added certain substances that were previously considered impurities has viewed. Compounds of potassium, sodium, Iron and manganese. It has been shown that in certain cases individual of the compounds mentioned, in other cases mixtures of several of them (their Composition may change depending on the circumstances) produce the desired effect.
Die Menge der Zusätze braucht in jedem Fall nur sehr klein zu sein; bei Eisen und Mangan darf sie nur einige Tausendstel der Atznatronmenge erreichen, während der Zusatz von Kalium- und Natriumverbindungen ein Hundertstel des Ätznatrons übersteigen darf.The amount of additives need only be very small in each case; with iron and manganese it may only reach a few thousandths of the amount of caustic soda, while the addition of potassium and sodium compounds one hundredth of the caustic soda may exceed.
Reine Natronlauge hat zwar den Vorzug, ein helleres Produkt zu geben als handelsübliche Natronlauge; aber durch empirische Dosierung der Zusätze kann man das Optimum in bezug auf die Farbe der Viskose einerseits und die Güte des Spinnproduktes andererseits leicht erreichen.Pure caustic soda has the advantage of giving a lighter product as commercial caustic soda; but by empirical dosing of the additives can the optimum in terms of the color of the viscose on the one hand and the quality of the spun product on the other hand easy to reach.
Die Beimischung kann auf verschiedene Weise erfolgen. Am besten geschieht sie durch Einbringen einer für den jeweiligen Fall passend zusammengesetzten Lösung der gewählten Bestandteile in eine bestimmte Menge der zu vergütenden Lauge. Man kann aber auch die gewünschte Beschaffenheit durch geeignete Zusammensetzung ides Elektrolyten bei der Herstellung der Lauge oder durch Vermischung der zu vergütenden Lauge mit einer (meist größeren) Menge von solcher Lauge erzielen, welche die gewünschten Stoffe in dazu geeigneter Menge enthält.The admixture can take place in various ways. Best happens by introducing a solution that is appropriately composed for the respective case the selected ingredients in a certain amount of the lye to be treated. Man but can also ides the desired texture through suitable composition Electrolytes during the production of the lye or by mixing the one to be remunerated Achieve lye with a (usually larger) amount of such lye, which the desired Contains substances in a suitable quantity.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH121848D DE505372C (en) | 1929-05-29 | 1929-05-29 | Process to remunerate the sodium hydroxide solution used for the viscose process and produced in the electrolytic mercury process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH121848D DE505372C (en) | 1929-05-29 | 1929-05-29 | Process to remunerate the sodium hydroxide solution used for the viscose process and produced in the electrolytic mercury process |
Publications (1)
Publication Number | Publication Date |
---|---|
DE505372C true DE505372C (en) | 1930-08-18 |
Family
ID=7173965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEH121848D Expired DE505372C (en) | 1929-05-29 | 1929-05-29 | Process to remunerate the sodium hydroxide solution used for the viscose process and produced in the electrolytic mercury process |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE505372C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE936390C (en) * | 1952-02-21 | 1955-12-15 | Ici Ltd | Process for cleaning caustic alkali solutions |
-
1929
- 1929-05-29 DE DEH121848D patent/DE505372C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE936390C (en) * | 1952-02-21 | 1955-12-15 | Ici Ltd | Process for cleaning caustic alkali solutions |
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