Process for forming amine by direct amination reaction
View Patent ↗Providing a process for forming an amine, such as a primary, a secondary or a tertiary amine, via the direct amination of an alcohol using a catalyst comprising at least a palladium compound on a support comprising cerium oxide.
1. A process to produce at least one amine, the process comprising at least reacting:
1) a first reactant being an alkyl alcohol comprising one primary or secondary hydroxyl group; and
2) a second reactant being ammonia and/or an ammonia source;
in the presence of a catalyst comprising at least a palladium compound on a support comprising a cerium oxide.
2. The process according to claim 1 wherein the support of the catalyst comprises between 50-100% by weight of cerium oxide, based on the total weight of the support.
3. The process according to claim 1 wherein the cerium oxide provides a specific surface comprised between 50 and 300 m 2 /g, measured after calcination at a temperature of 350° C. for 2 hours.
4. The process according to claim 1 wherein the palladium compound is chosen from the group consisting of: palladium metal, PdO, PdO 2 , palladium nitrate, palladium chloride, palladium acetate, palladium acetylacetonate, and palladium hydroxide.
5. The process according to claim 1 wherein the catalyst is obtained by impregnation or co-precipitation.
6. The process according to claim 1 wherein the weight ratio of the catalyst to the second reactant is comprised between 0.05 and 2.
7. The process according to claim 1 wherein the first reactant comprises an alkyl chain comprising from 1 to 40 carbon atoms.
8. The process according to claim 1 wherein the first reactant is a compound of formula (I) R 1 —OH or formula (II) R 2 —C(OH)—R 3 , wherein R 1 , R 2 , and R 3 are independently an alkyl group comprising from 1 to 40 carbon atoms.
9. The process according to claim 1 wherein the first reactant is a compound of formula (I) R 1 —OH or formula (II) R 2 —C(OH)—R 3 , wherein R 1 , R 2 , and R 3 are independently an alkyl group comprising from 4 to 20 carbon atoms.
10. The process according to claim 1 wherein the first reactant is chosen from the group consisting of: 1-butanol, 1-hexanol, 1-octanol, 1-decanol, 1-dodecanol, 2-butanol, 2-hexanol, 3-hexanol, 2-octanol, 3-octanol and 4-octanol.
11. The process according to claim 1 wherein the second reactant is ammonia.
12. The process according to claim 1 wherein ammonia is gaseous ammonia, liquid ammonia, or an ammonia solution in a solvent.
13. The process according to claim 1 wherein the obtained amine is chosen from the group consisting of: octylamine, dioctylamine, trioctylamine, butylamine, dibutylamine, tributylamine, hexylamine, dihexylamine, trihexylamine, decylamine, didecylamine, tridecylamine, dodecylamine, didodecylamine, and tridodecylamine.
14. The process according to claim 1 wherein the reaction medium comprises at the start of the reaction, between 0.1 and 50 molar equivalent of the second reactant for 1 molar equivalent of the first reactant.