Process for preparing alkylamines by reacting olefins with ammonia
A process for preparing alkylamines by reacting olefins with ammonia under hydroaminating conditions over a calcined zeolitic catalyst in an adiabatically operated reactor unit, wherein the reaction mixture comprising the starting olefin, ammonia and the corresponding alkylamine is taken off at one or more points and brought into indirect thermal contact with the reaction mixture at one or more points in the reactor unit having in each case a lower concentration of alkylamine compared to the point from which the reaction mixture was taken off, is proposed.
1. A process for preparing alyklamines by reacting olefins with ammonia under hydroaminating conditions over a calcined zeolitic catalyst in an adiabatically operated reactor unit, wherein the reaction mixture comprising the staffing olefin, ammonia and the corresponding alkylamine is taken off at one or more points and brought into indirect thermal contact with the reaction mixture at one or more points in the reactor unit having in each case a lower concentration of alkylamine compared to the point from which the reaction mixture was taken off.
2. A process for preparing alkylamines by reacting olefins with ammonia under hydroaminating conditions over a calcined zeolitic catalyst in an adiabatically operated reactor unit, wherein the reaction mixture comprising the staffing olefin, ammonia and the corresponding alklamine is diverted in the middle of its flow path through the reactor unit and put in to indirect countercurrent thermal contact with the reaction mixture conveyed up to the middle of the flow path in the reactor unit.
3. The process according to claim 1 , wherein a plurality of reactor units are connected.
4. The process according to claim 1 , wherein the olefins are selected from among C- 3 -C 5 -olefins.
5. The process according to claim 4 , wherein the olefin is isobutene.
6. The process according to claim 1 , wherein the reactor unit is a shaft apparatus provided with internals.
7. The process according to claim 6 , wherein the internals are separation plates or a bundle of tubes.
8. The process according to claim 6 , wherein the heat transport path in the internals is from 3 to 15 mm.
9. The process according to claim 8 , wherein the heat transport path is from 5 to 10 mm.
10. The process according to claim 8 , wherein the heat transport path corresponds to the internal diameter of the tubes of the bundle of tubes or to the distance between two successive separation plates.
11. The process according to claim 2 , wherein a plurality of reactor units are connected.
12. The process according to claim 2 , wherein the olefins are selected from among C- 3 -C 5 -olefins.
13. The process according to claim 3 , wherein the olefins are selected from among C- 3 -C 5 -olefins.
14. The process according to claim 2 , wherein the reactor unit is a shaft apparatus provided with internals.
15. The process according to claim 3 , wherein the reactor unit is a shaft apparatus provided with internals.
16. The process according to claim 4 , wherein the reactor unit is a shaft apparatus provided with internals.
17. The process according to claim 5 , wherein the reactor unit is a shaft apparatus provided with internals.
18. The process according to claim 7 , wherein the heat transport path in the internals is from 3 to 15 mm.
19. The process according to claim 9 , wherein the heat transport path corresponds to the internal diameter of the tubes of the bundle of tubes or to the distance between two successive separation plates.
20. The process according to claim 2 , wherein the olefin is isobutene.