Claims
- 1. A process for the production of N,N-dimethylaminopropylamine from N,N-dimethylaminopropionitrile by low pressure hydrogenation comprising:
feeding hydrogen and N,N-dimethylaminopropionitrile into a low-pressure reactor containing a sponge nickel catalyst, at least one Group IA alkali metal hydroxide, and water to form a reaction medium; heating the reaction medium to a temperature of about 70° C. to about 100° C.; pressurizing the reactor to a pressure of about 45 psig to about 500 psig; and hydrogenating the nitrile to form N,N-dimethylaminopropylamine,
- 2. The process of claim 1, wherein the selectivity of N,N-dimethylaminopropionitrile to N,N-dimethylaminopropylamine is greater than about 99.60%.
- 3. The process of claim 1, wherein the selectivity of N,N-dimethylaminopropionitrile to N,N-dimethylaminopropylamine is greater than about 99.90%.
- 4. The process of claim 1, wherein the Group IA alkali metal hydroxide is selected from the group consisting of sodium hydroxide, potassium hydroxide, rubidium hydroxide, cesium hydroxide and mixtures thereof.
- 5. The process of claim 1 wherein the Group IA alkali metal hydroxide is potassium hydroxide.
- 6. The process of claim 1 wherein the Group IA alkali metal hydroxide is sodium hydroxide.
- 7. The process of claim 1 wherein the Group IA alkali metal hydroxide is a mixture of sodium hydroxide and potassium hydroxide.
- 8. The process according to claim 1 wherein the temperature is between 85° C. and 95° C.
- 9. The process of claim 1 wherein the pressure is between 45 psig and 300 psig
- 10. The process of claim 1 wherein the pressure is between 45 psig and 150 psig.
- 11. The process of claim 1 wherein the pressure is between 45 psig and 110 psig.
- 12. The process of claim 1 wherein the amount of water is about 0.1 wt. % to about 10 wt. % of the reaction medium.
- 13. A process for the production of N,N-dimethylaminopropylamine from N,N-dimethylaminopropionitrile by low pressure hydrogenation comprising:
feeding hydrogen and N,N-dimethylaminopropionitrile into a low-pressure reactor containing a catalyst, at least one Group IA alkali metal hydroxide, and water to form a reaction medium; heating the reaction medium to a temperature of about 70° C. to about 100° C.; pressurizing the reactor to a pressure of about 45 psig to about 150 psig; and hydrogenating the nitrile to form N,N-dimethylaminopropylamine.
- 14. The process of claim 13, wherein the catalyst is a sponge nickel catalyst.
- 15. The process of claim 13, wherein the catalyst is a cobalt catalyst.
Parent Case Info
[0001] This application is a continuation-in-part of and claims priority from application Ser. No. 10/327,765, filed Dec. 23, 2002.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10327765 |
Dec 2002 |
US |
Child |
10731733 |
Dec 2003 |
US |