Chinese Academy of Sciences

Rhodia Operations

Hangkong Yuan

Feng Shi

Youquan Deng

Xinjiang Cui

Peng Li

Yan Zhang

Armin T Liebens

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.

Process for production of aromatic compounds comprising at least two amine functions

A process for producing N-methyl or N,N-dimethyl amines, which comprises using amine compound, nitro-containing compound or nitrile compound as a starting material, carbon dioxide as a methylating agent and hydrogen gas as a reducing agent, and allowing them to react in a sealed reactor for 6 to 48 h in a reaction medium at a reaction temperature of 80 to 180 &#xb0; C. in the presence of a composite catalyst, so as to provide N-methyl or N,N-dimethyl amines. The process of the present invention is simple and under relative mild reaction conditions. By means of the process of the invention, the target products can be prepared at low cost with a high yield. The catalysts used have a high catalytic activity and can be separated from the reaction system simply and reused. Furthermore, the whole process of the present invention is environmental-friendly and facilitates the cycling use of carbon dioxide.

Process for producing N-methyl or N,N-dimethyl amines

The invention relates to a method for producing a N-substituted amine compound by catalyzed alkylation. The method uses amine and alcohol or two kinds of amines as the reaction materials, employs composite metal oxides catalyst at a reaction temperature of 80-180&#xb0; C. to catalyze the reaction for 6-36 hours, so as to produce the N-substituted amine compound. The reaction condition of the method of the invention is relatively moderate, using a catalyst made of cheap non-noble metals, which is non-caustic and easy to be separated and reused. The reaction does not need any medium and has relatively high conversion rate and selectivity.

Method for producing N-substituted amine compounds through catalyzed alkylation

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Lanzhou, China

Hangkong Yuan