DD254199A1 - PROCESS FOR CLEANING WAFERRIGER N-METHYLMORPHOLIN N-OXYD SOLUTIONS - Google Patents
PROCESS FOR CLEANING WAFERRIGER N-METHYLMORPHOLIN N-OXYD SOLUTIONS Download PDFInfo
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- DD254199A1 DD254199A1 DD29704486A DD29704486A DD254199A1 DD 254199 A1 DD254199 A1 DD 254199A1 DD 29704486 A DD29704486 A DD 29704486A DD 29704486 A DD29704486 A DD 29704486A DD 254199 A1 DD254199 A1 DD 254199A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/04—Processes using organic exchangers
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Die Erfindung betrifft die Reinigung waessriger N-Methylmorpholin-N-oxid-(NMMNO)-Loesungen insbesondere aus der Regenerierung von Polymeren in der Chemiefaser- bzw. Plasteindustrie. Die Reinigung erfolgt erfindungsgemaess, indem 5-60 Ma.-% NMMNO enthaltende waessrige Loesungen mit einer Geschwindigkeit von 5-30 cm/min bei 10-60 Grad C mit Styren-Divinylbenzen-Copolymerisat gefuellte Austauschersaeulen passieren. Diese enthalten in der ersten Stufe tertiaere Aminogruppen vom Typ -CH Ind 2 - N(CH Ind3)Ind2 und in der zweiten Stufe quartaere Ammoniumgruppen vom Typ -CH Ind 2-(N(CH Ind 3)Ind3)OH. Mit der Erfindung wird der Zeit- und Energieaufwand sowie die Rueckgewinnungsquote der Loesung gegenueber den bisherigen destillativen Verfahren verbessert.The invention relates to the purification of aqueous N-methylmorpholine-N-oxide (NMMNO) solutions, in particular from the regeneration of polymers in the synthetic or plastics industry. The cleaning is carried out according to the invention by passing 5-60% by mass of NMMNO-containing aqueous solutions at a rate of 5-30 cm / min at 10-60 ° C with styrene-divinylbenzene copolymer filled exchanger columns. These contain in the first stage tertiary amino groups of the type -CH Ind 2 -N (CH Ind3) Ind2 and in the second stage quaternary ammonium groups of the type -CH Ind 2- (N (CH Ind 3) Ind 3) OH. With the invention of the time and energy consumption and the recovery rate of the solution is improved over the previous distillation process.
Description
Anwendungsgebiet der ErfindungField of application of the invention
Die Erfindung betrifft ein Verfahren zur Reinigung wäßriger N-Methylmorpholin-N-oxid-(NMMNO)-Lösungen, die beim Lösen und Regenerieren von Polymeren in der Chemiefaser- bzw. Plasteindustrie anfallen.The invention relates to a process for the purification of aqueous N-methylmorpholine-N-oxide (NMMNO) solutions, which are obtained in the dissolution and regeneration of polymers in the chemical or plastics industry.
Charakteristik des bekannten Standes der TechnikCharacteristic of the known state of the art
Es ist bekannt, wäßrige NMMNO-Lösungen dadurch zu reinigen, daß man sie durch Vakuumdestillation auf ca. 86Ma.-% NMMNO einengt und das ausfallende Monohydrat in Aceton umkristallisiert (US-PS 3447939). Diese Methode ist sehr zeit- und energieaufwendig und gestattet Rückgewinnungsquoten nur bis maximal 85%.It is known to purify aqueous NMMNO solutions in that they are concentrated by vacuum distillation to about 86Ma .-% NMMNO and recrystallized the precipitated monohydrate in acetone (US-PS 3447939). This method is very time and energy consuming and allows recovery rates only up to 85%.
Ziel der ErfindungObject of the invention
Das Ziel der Erfindung besteht in einem vereinfachten Verfahren zur Reinigung von wäßrigen NMMNO-Lösungen mit geringem Zeit- und Energieaufwand.The object of the invention is a simplified process for the purification of aqueous NMMNO solutions with a low expenditure of time and energy.
Darlegung des Wesens der ErfindungExplanation of the essence of the invention
Die Aufgabe der Erfindung besteht in der Beseitigung dero.g. Mängel durch die Erarbeitung eines Verfahrens zur Reinigung von wäßrigen NMMNO-Lösungen durch Behandlung mit Austauschharzen.The object of the invention is to eliminate dero.g. Deficiencies in the development of a process for purifying aqueous NMMNO solutions by treatment with replacement resins.
Erfindungsgemäß wird das erreicht, indem 5-60Ma.-% NMMNO enthaltende, wäßrige Lösungen mit einer Geschwindigkeit von 5-30cm/min und einerTemperatur von 10-60°C mit Styren-Divinylbenzen-Copolymerisat gefüllte Austauschersäuien passieren. Diese enthalten in der ersten Stufe tertiäre Aminogruppen vom Typ-CH2N(CH3)2 und in der zweiten Stufe quartäre Ammoniumgruppen vom Typ-CH2-[-N-(CH3)3]OH.According to the invention, this is accomplished by passing aqueous solutions containing 5-60Ma% of NMMNO at a rate of 5-30 cm / min and a temperature of 10-60 ° C with styrene-divinylbenzene copolymer filled exchange acids. These contain in the first stage tertiary amino groups of the type -CH2N (CH3) 2 and in the second stage quaternary ammonium groups of the type -CH2 - [- N- (CH3) 3] OH.
Ausführungsbeispieleembodiments
Die Erfindung soll nachstehend an Beispielen erläutert werden.The invention will be explained below by way of examples.
Beispiel 1example 1
Spinnbadlösung aus der Cellulosefaserstoffregenerierung mit 20Ma.-% NMMNO wird bei 20°C und einer Geschwindigkeit von 20cm/min über Austauschersäulen geleitet, die mit Styren-Divinylbenzen-Copolymerisat gefüllt sind. In der ersten Stufe enthält das Copolymerisat als wirksame Gruppe-CH2-N(CH3)2 (zum Beispiel Wofatit AD42) und in zweiter Stufe entsprechend die Gruppe-CH2-N(CH3)3 OH (zum Beispiel Wofatit SZ30). Die Aktivierung der Säulen erfolgt mit 3masse%igen Natriumhydroxid-Lösungen, die Regenerierung mit Lösungen, die 3Ma.-% Natriumhydroxid und 10Ma.-% Kochsalz enthalten.Spunbath solution from the cellulose pulp regeneration with 20Ma .-% NMMNO is passed at 20 ° C and a speed of 20cm / min on exchanger columns filled with styrene-divinylbenzene copolymer. In the first stage, the copolymer contains as active group -CH 2 -N (CH 3) 2 (for example Wofatit AD42) and in the second stage correspondingly the group -CH 2 -N (CH 3) 3 OH (for example Wofatit SZ30). The activation of the columns is carried out with 3% by weight sodium hydroxide solutions, the regeneration with solutions containing 3Ma .-% sodium hydroxide and 10Ma .-% sodium chloride.
Die durch NMMNO-Zersetzungsprodukte bei Beginn der Reinigung dunkel gefärbte Lösung ist nach Passieren der ersten Stufe hellbraun bis gelb und nach Passieren der zweiten Stufe hellgelb bis wasserklar.The dark colored by NMMNO decomposition products at the beginning of the cleaning solution is light brown to yellow after passing the first stage and after passing the second stage light yellow to water clear.
Beispiel 2Example 2
Spinnbadlösungen aus der Cellulosefolieregenerierung mit 52 Ma.-% NMMNO werden bei Temperaturen von 50-55°C und einer Geschwindigkeit von 10cm/min über Austauschersäulen geleitet, die analcv Beispiel 1 gefüllt sind.Spinning bath solutions from cellulose pulp generation with 52% by weight of NMMNO are passed at temperatures of 50-55 ° C. and a speed of 10 cm / min over exchanger columns filled with the analcv example 1.
Die gereinigte Lösung ist hellgelb und frei von Stabilisatoren, die während der Polymerverarbeitung zugegeben wurden und bei der Polymerregenerierung in das Spinnbad gelangten. «The purified solution is light yellow and free of stabilizers added during polymer processing and entering the spin bath upon polymer regeneration. "
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD29704486A DD254199B5 (en) | 1986-12-04 | 1986-12-04 | PROCESS FOR CLEANING WAFERRIGER N-METHYLMORPHOLIN N-OXYD SOLUTIONS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD29704486A DD254199B5 (en) | 1986-12-04 | 1986-12-04 | PROCESS FOR CLEANING WAFERRIGER N-METHYLMORPHOLIN N-OXYD SOLUTIONS |
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Publication Number | Publication Date |
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DD254199A1 true DD254199A1 (en) | 1988-02-17 |
DD254199B5 DD254199B5 (en) | 1994-01-05 |
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DD29704486A DD254199B5 (en) | 1986-12-04 | 1986-12-04 | PROCESS FOR CLEANING WAFERRIGER N-METHYLMORPHOLIN N-OXYD SOLUTIONS |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0427701A1 (en) * | 1989-10-16 | 1991-05-15 | Lenzing Aktiengesellschaft | Process for purifying aqueous solutions of N-methyl-morpholine N-oxide |
WO1993011287A1 (en) * | 1991-12-02 | 1993-06-10 | Courtaulds Plc | Purifying aqueous solutions of amine-n-oxides |
EP0679739A1 (en) * | 1994-04-27 | 1995-11-02 | Korea Institute Of Science And Technology | Method for the purification of reclaimed aqueous N-methylmorpholine N-oxide solution |
US5602247A (en) * | 1994-03-01 | 1997-02-11 | Lenzing Aktiengesellschaft | Process for the purification of aqueous solutions of tertiary amine-oxides |
US5773655A (en) * | 1995-08-18 | 1998-06-30 | Lenzing Aktiengesellschaft | Process for the purification of an aqueous solution of a tertiary amine-oxide |
WO2005007946A1 (en) * | 2003-07-11 | 2005-01-27 | Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. | Thermoresistant molding or spinning material |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT403297B (en) * | 1995-08-18 | 1997-12-29 | Chemiefaser Lenzing Ag | METHOD FOR SELECTIVE SEPARATION OF MORPHOLINE |
-
1986
- 1986-12-04 DD DD29704486A patent/DD254199B5/en active IP Right Grant
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0427701A1 (en) * | 1989-10-16 | 1991-05-15 | Lenzing Aktiengesellschaft | Process for purifying aqueous solutions of N-methyl-morpholine N-oxide |
AT392776B (en) * | 1989-10-16 | 1991-06-10 | Chemiefaser Lenzing Ag | METHOD FOR PURIFYING AQUEOUS SOLUTIONS OF N-METHYLMORPHOLIN-N-OXIDE |
US5053138A (en) * | 1989-10-16 | 1991-10-01 | Lenzing Aktiengesellschaft | Process for purifying an aqueous solution of N-methyl-morpholine N-oxide |
TR25095A (en) * | 1989-10-16 | 1992-11-01 | Lenzing Aktiengessellschaft | TREATMENT OF N-METHYL-MORPHOLIN-N-OXID IN WATER SOLUTIONS. |
WO1993011287A1 (en) * | 1991-12-02 | 1993-06-10 | Courtaulds Plc | Purifying aqueous solutions of amine-n-oxides |
US5602247A (en) * | 1994-03-01 | 1997-02-11 | Lenzing Aktiengesellschaft | Process for the purification of aqueous solutions of tertiary amine-oxides |
US5628941A (en) * | 1994-03-01 | 1997-05-13 | Lenzing Aktiengesellschaft | Process for the production of cellulose moulded bodies |
EP0695324B1 (en) * | 1994-03-01 | 1997-10-29 | Lenzing Aktiengesellschaft | Process for producing cellulose shaped bodies |
EP0679739A1 (en) * | 1994-04-27 | 1995-11-02 | Korea Institute Of Science And Technology | Method for the purification of reclaimed aqueous N-methylmorpholine N-oxide solution |
US5611932A (en) * | 1994-04-27 | 1997-03-18 | Korea Institute Of Science And Technology | Method for the purification of reclaimed aqueous N-methylmorpholine N-oxide solution |
US5773655A (en) * | 1995-08-18 | 1998-06-30 | Lenzing Aktiengesellschaft | Process for the purification of an aqueous solution of a tertiary amine-oxide |
WO2005007946A1 (en) * | 2003-07-11 | 2005-01-27 | Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. | Thermoresistant molding or spinning material |
GB2419885A (en) * | 2003-07-11 | 2006-05-10 | Thueringisches Inst Textil | Thermoresistant molding or spinning material |
GB2419885B (en) * | 2003-07-11 | 2007-12-27 | Thueringisches Inst Textil | Thermostable molding or spinning compound |
Also Published As
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Owner name: OSTTHUERINGISCHE MATERIALPRUEFGESELLSCHAFT F. TEXT Effective date: 19970529 |
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