CARBONYLATION METHOD Russian patent published in 2011 - IPC C07C51/12 C07C51/44 C07C53/08 

FIELD: chemistry.

SUBSTANCE: method of carbonylating an alcohol and/or reactive derivative thereof includes the following steps: (a) feeding one or more streams of starting materials into a reaction zone, where at least one stream of starting materials of the reaction zone includes an alcohol and/or reactive derivative thereof and at least one stream of starting materials of the reaction zone includes carbon monoxide; (b) maintaining temperature and pressure in the reaction zone which is sufficient to enable flow of an exothermic carbonylation reaction to obtain a carboxylic acid and/or carboxylic acid anhydride; (c) removal from the reaction zone of one or more product streams containing carboxylic acid and/or carboxylic acid anhydride; (d) transferring heat contained in at least part of one or more product streams to a first heat-exchange stream. Heat is transferred from a second heat-exchange stream to the stream of starting materials of the reaction zone at step (a) before directing said stream of initial materials of the reaction zone into the reaction zone where temperature of the second heat-exchange stream before heat transfer is lower than the temperature of one or more product streams. That way, heat coming from the second heat-exchange stream can be transferred to the first heat-exchange stream.

EFFECT: low heat loss and high efficiency of the process.

17 cl, 3 dwg