The preparation process of copper catalysts supported on hydroxyapatite, and its application in the direct synthesis of crotonaldehyde from ethanol.

摘要

The preparation process of copper catalysts supported on hydroxyapatite, and its application in the direct synthesis of crotonaldehyde from ethanol.It is described a process for preparing catalysts based on copper supported on hydroxyapatite, useful for the production of crotonaldehyde from ethanol.The process of obtaining crotonaldehyde comprises directing a stream (2) of ethanol fresh for a reactor (7) loaded with the catalyst of the invention.Under the reaction conditions at temperatures between 180 and 360 C 198 198 C, the pressure between 1 and 2 atmospheres and factor of residence time 50 to 250 kg ~ cat ~ min kg ^ - 1 ^ ~ EtOH.Obtaining a stream (8) of the product at the outlet of the reactor (7) which is cooled in a heat exchanger system (9), where it is separated the liquid product, and the product gas stream (17), the current (10).The heat exchanger (11) separates mainly acetaldehyde, the current (16) which can be recycled to the reactor (7), and a hydrogen stream (13).You can feed the reactor (24) for the reactions of hydrogenation of crotonaldeido in products such as alcohol crotu00edlico, butanol and butiraldeido.Hydrogen can alternatively be stored in the tank (14).The liquid stream (17) containing the liquid product is refined in (18) and the crotonaldehyde product is stored in the tank (20).Or is fed to the reactor (23) for the integrated production of oxidation products of crotonaldeido and / or the reactor (24) for the integrated production of products of hydrogenation of crotonaldehyde and u00e1lco are:Ol crotilico, butanol and butyraldehyde.