Carbonylation process

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 51/12 (2006.01) C07C 53/08 (2006.01)

Patent

CA 2632917

A process for the carbonylation of an alcohol and/or reactive derivative thereof, in which one or more reaction zone feed streams are fed to a reaction zone in which exothermic carbonylation takes place to produce one or more product streams. Heat from at least a portion of the one or more product streams is fed to a first heat-exchange stream, such as a supply of pressurised steam. The process is characterised by heat from a second heat- exchange stream, having a temperature lower than that of the one or more product streams, being transferred to a reaction zone feed stream, so that the one or more product streams comprise heat originating from the second heat- exchange stream and heat generated by the exothermic carbonylation reaction. Thus, heat originating from the second heat-exchange stream can be transferred to the first heat-exchange stream, resulting in reduced heat loss and greater process efficiency.

L~invention concerne un procédé de carbonylation d~un alcool et/ou d~un dérivé réactif de cet alcool, selon lequel un ou plusieurs courants d~alimentation de zone de réaction sont introduits dans une zone de réaction dans laquelle une carbonylation exothermique a lieu, produisant un ou plusieurs courants de produits. La chaleur issue d~au moins une partie du ou des courants de produits est introduite dans un premier courant d~échange thermique, tel qu~une alimentation de vapeur sous pression. Le procédé est caractérisé en ce que la chaleur issue d~un second courant d~échange thermique présentant une température inférieure à celle du ou des courants de produits est transférée à un courant d~alimentation d~une zone de réaction, de manière à ce que le ou les courants de produits comprennent de la chaleur issue du second courant d~échange thermique et de la chaleur issue de la réaction de carbonylation exothermique. La chaleur issue du second courant d~échange thermique peut ainsi être transférée au premier courant d~échange thermique, permettant ainsi d~obtenir une perte thermique réduite et un procédé d~une plus grande efficacité.

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