Process for production of aromatic compounds comprising at least two amine functions
Provided is a process for the production of an aromatic compound comprising at least two amine functions, comprising reacting an aromatic compound having at least one hydroxyl function and at least one aldehyde function with a second reactant having an amine function, in the presence of a reductant agent and a catalyst comprising at least one metal element in elemental form and/or at least one metal oxide.
1. A process for the production of an aromatic compound comprising at least two amine functions, the process comprising reacting:
A first reactant being an aromatic compound having at least one hydroxyl function and at least one aldehyde function, with
A second reactant being a compound of formula (I),
R—NH 2 (I)
wherein R is H or an alkyl, alkenyl, aryl, cycloalkyl or heterocyclic group, in the presence of a catalyst and a reductant agent, wherein the catalyst comprises at least one metal element selected from the group consisting of nickel, cobalt, copper, tin, aluminum and chromium in elemental form and/or at least one metal oxide selected from the group consisting of NiAlO c , CuNiO c , CuNiAlO c , CuNiMgO c , RuCuNiAlO c , CuNiZnO c , PtNiZnO c , and CuZrO c , wherein c is greater than zero and less than a number sufficient to satisfy the valence requirements of the other elements present when in a fully oxidized state.
2. The process according to claim 1 , wherein the first reactant is selected from the group consisting of: 5-hydroxymethyl furfural (HMF), 5-(3-(hydroxymethyl)phenyl)furfural, 5-(4-(hydroxymethyl)phenyl)furfural, 4-(hydroxymethyl)benzaldehyde, 3-(hydroxymethyl)benzaldehyde, 5-formyl-2- (hydroxymethyl)benzonitrile, 3-(5-(hydroxymethyl)furan-2-yl)acrylaldehyde and 5-(hydroxymethyl)thiophene-2-carbaldehyde.
3. The process according to claim 1 , wherein the first reactant is selected from the group consisting of: 5-hydroxymethyl furfural (HMF), 3-(hydroxymethyl)benzaldehyde and 5-formyl-2-(hydroxymethyl)benzonitrile.
4. The process according to claim 1 , wherein the second reactant is selected from the group consisting of: ammonia, methylamine, n-heptylamine, allylamine, benzylamine, 3-phenylprop-2-enylamine, cyclohexanamine, and (tetrahydrofuran-2-yl)methanamine.
5. The process according to claim 1 , wherein the molar ratio of second reactant to first reactant is comprised from 10:1 to 150:1.
6. The process according to claim 1 , wherein the reductant agent is hydrogen or a secondary alcohol.
7. The process according to claim 1 , wherein molar ratio of the reductant agent to the first reactant is comprised from 1:1 to 10:1.
8. The process according to claim 1 , wherein the catalyst comprises a support.
9. The process according to claim 8 , wherein weight ratio of metal element is comprised from 0.5 wt % to 80 wt % based on total weight of catalyst.
10. The process according to claim 1 , wherein the catalyst is Raney catalyst selected from a group consisting of Raney nickel, Raney cobalt and Raney copper.
11. The process according to claim 1 , wherein weight ratio of catalyst to first reactant is comprised from 1:20 to 2:1.
12. The process according to claim 1 , wherein the reaction medium is heated to desired temperature by Gradient Temperature-elevating Method.
13. The process according to claim 1 , wherein the reaction is carried out in the presence of an inert atmosphere.
14. The process according to claim 1 , wherein the method for preparing the catalyst comprising at least one metal oxide selected from the group consisting of NiAlO c , CuNiO c , CuNiAlO c , CuNiMgO c , RuCuNiAlO c , CuNiZnO c , PtNiZnO c , and CuZrO c comprises the following steps:
(i) preparing a mixture comprising the metal elements of the catalyst in ionic form;
(ii) adding a co-precipitating agent to the mixture to precipitate the metal elements of the catalyst, to obtain a slurry;
(iii) filtering and drying the slurry, to obtain a catalyst precursor; and
(iv) subjecting the catalyst precursor to reduction, to obtain the catalyst.