Claims
- 1. A method for the separation of bis-(2-aminoethyl) ether from N-(2-methoxyethyl)morpholine comprising:
- a. azeotropically distilling a mixture comprising bis-(2-aminoethyl)ether and N-(2-methoxyethyl)morpholine with an entrainer to selectively remove the N-(2-methoxyethyl)morpholine with the entrainer, and
- b. extracting the N-(2-methoxyethyl)morpholine from the entrainer by means of liquid-liquid extraction using a non polar hydrocarbon or aromatic extraction solvent.
- 2. The method of claim 1 which additionally comprises:
- c. distilling N-(2-methoxyethyl)morpholine from the extraction solvent.
- 3. The method of claim 1 wherein in step b. there is 5 to 85 wt % water present.
- 4. The method of claim 1 wherein the amount of N-(2-methoxyethyl)morpholine in step b. is 10 to 90 wt %.
- 5. A method for the separation of bis-(2-aminoethyl) ether from N-(2-methoxyethyl)morpholine comprising:
- a. azeotropically distilling a mixture comprising bis-(2-aminoethyl)ether and N-(2-methoxyethyl)morpholine with an entrainer selected from the group consisting of monoethanolamine, 3-amino-1-propanol and 2-amino-1-propanol to selectively remove the N-(2-methoxyethyl)morpholine with the entrainer, and
- b. extracting the N-(2-methoxyethyl)morpholine from the entrainer by means of liquid-liquid extraction using an extraction solvent selected from the group consisting of hexane, heptane, cyclohexane, benzene, toluene and xylene.
- 6. The method of claim 1 which additionally comprises:
- c. distilling N-(2-methoxyethyl)morpholine from the extraction solvent.
- 7. The method of claim 1 wherein in step b. there is 5 to 85 wt % water present.
- 8. The method of claim 1 wherein the amount of N-(2-methoxyethyl)morpholine in step b. is 10 to 90 wt %.
- 9. A method for the separation of bis-(2-aminoethyl) ether from N-(2-methoxyethyl)morpholine comprising:
- a. azeotropically distilling a mixture comprising bis-(2-aminoethyl)ether and N-(2-methoxyethyl)morpholine with monoethanolamine to selectively remove the N-(2-methoxyethyl) morpholine with the monoethanolamine, and
- b. extracting the N-(2-methoxyethyl)morpholine from the monoethanolamine with an extraction solvent selected from the group consisting of hexane, cyclohexane and toluene.
- 10. The method of claim 4 which additionally comprises:
- c. distilling N-(2-methoxyethyl)morpholine from the extraction solvent.
- 11. The method of claim 1 wherein in step b. there is 5 to 85 wt % water present.
- 12. The method of claim 1 wherein the amount of N-(2-methoxyethyl)morpholine in step b. is 10 to 90 wt %.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of Ser. No. 06/699,296 filed Feb. 7, 1985, and now U.S. Pat. No. 4,579,630.
US Referenced Citations (9)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
699296 |
Feb 1985 |
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