Claims
- 1. A process for the recovery of oxazole from a mixture comprising oxazole and one or more other organic components comprising:
contacting the mixture with an aqueous solution comprising an acid to convert at least a portion of the oxazole into an oxazole acid salt and to dissolve at least a portion the oxazole acid salt into the aqueous solution; separating the aqueous solution comprising the dissolved oxazole acid salt from the mixture; contacting the aqueous solution after separation with a base to neutralize at least a portion of the oxazole acid salt to form released oxazole; and recovering at least a portion of the released oxazole.
- 2. The process of claim 1 wherein the mixture comprising oxazole and one or more other organic components comprises acetonitrile.
- 3. The process of claim 2 wherein the mixture comprises about 1 to about 60 weight percent oxazole and about 1 to about 80 weight percent acetonitrile.
- 4. The process of claim 2 wherein the mixture comprises about 10 to about 60 weight percent oxazole and about 10 to about 80 weight percent acetonitrile.
- 5. The process of claim 1 wherein the mixture comprising oxazole and one or more other organic components comprises about 10 to about 40 weight percent oxazole, up to about 3 weight percent hydrogen cyanide, about 10 to about 40 weight percent water, and about 45 to about 60 weight percent acetonitrile.
- 6. The process of claim 1 wherein the mixture comprising oxazole and one or more other organic components comprises about 10 to about 60 weight percent oxazole, about 1 to about 20 weight percent water, about 40 to about 60 weight percent acetonitrile, about 0 to about 5 weight percent methanol, about 0 to about 15 weight percent acetone, about 0 to about 5 weight percent allyl alcohol and no more than about 300 ppm by weight hydrogen cyanide.
- 7. The process of claim 1 wherein the acid comprises sulfuric acid.
- 8. The process of claim 1 wherein the base comprises sodium hydroxide.
- 9. A process for the recovery of oxazole comprising:
contacting a mixture comprising oxazole and acetonitrile with an acid to form an acid salt of oxazole; separating acid salt of the oxazole from the mixture; neutralizing the acid salt of oxazole separated from the mixture to release oxazole.
- 10. The process of claim 9 wherein the mixture comprises about 1 to about 60 weight percent oxazole and about 1 to about 80 weight percent acetonitrile.
- 11. The process of claim 9 wherein the mixture comprises about 10 to about 60 weight percent oxazole and about 10 to about 80 weight percent acetonitrile.
- 12. The process of claim 9 wherein the mixture comprises about 10 to about 40 weight percent oxazole, up to about 3 weight percent hydrogen cyanide, about 10 to about 40 weight percent water, and about 45 to about 60 weight percent acetonitrile.
- 13. The process of claim 9 wherein the mixture comprises about 10 to about 60 weight percent oxazole, about 1 to about 20 weight percent water, about 40 to about 60 weight percent acetonitrile, about 0 to about 5 weight percent methanol, about 0 to about 15 weight percent acetone, about 0 to about 5 weight percent allyl alcohol and no more than about 300 ppm by weight hydrogen cyanide.
- 14. The process of claim 9 wherein the acid comprises sulfuric acid.
- 15. The process of claim 9 wherein the neutralization comprises reacting the acid salt with a base.
- 16. The process of claim 15 wherein the base comprises sodium hydroxide.
- 17. The process of claim 9 wherein prior to contacting the mixture with an acid to form the acid salt of oxazole, the mixture is contacted with a base.
- 18. The process of claim 17 wherein the base is one or more of sodium hydroxide or potassium hydroxide.
- 19. The process of claim 17 wherein the mixture comprises water and the amount of base used is about 2 to about 4 moles of base per mole of water present.
- 20. A process for the purification of a mixture comprising oxazole comprising contacting the mixture with a base.
- 21. The process of claim 20 wherein the base comprises one or more alkali or alkaline earth metal hydroxides.
- 22. The process of claim 20 wherein the mixture comprising oxazole comprises one or more of water and HCN.
Parent Case Info
[0001] This application claims the benefit of U.S. Provisional Application No. 60/438,419 having a filing date of Jan. 7, 2003 and U.S. Provisional Application No. 60/442,359 having a filing date of Jan. 24, 2003.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60438419 |
Jan 2003 |
US |
|
60442359 |
Jan 2003 |
US |