Method of manufacturing acetic acid

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 51/12 (2006.01) B01J 8/22 (2006.01)

Patent

CA 2517882

Acetic acid is manufactured by carbonylating methanol with carbon monoxide by way of a heterogeneous catalytic reaction in a bubble column reactor. The carbonylating reaction is conducted with a solid catalyst concentration of not less than 100 kg/m3 in terms of the reaction volume. For the reaction, the partial pressure of carbon monoxide in the reactor is confined to a range between 1.0 and 2.5 MPa while the exhaustion ratio of carbon monoxide is confined to a range between 3 and 15% of the theoretical reaction volume of carbon monoxide and the liquid superficial velocity is made to be found in a range between 0.2 and 1.0 m/sec.

Selon le procédé de cette invention, pour fabriquer l'acide acétique, on procède à la carbonylation d'un méthanol avec un monoxyde de carbone par une réaction catalytique hétérogène dans un réacteur à colonnes à bulles. La réaction de carbonylation est effectuée avec une concentration de catalyseur solide n'allant pas en-dessous de 100 kg/m3 en termes de volume réactionnel. Concernant la réaction, la pression partielle du monoxyde de carbone dans le réacteur est limitée à une plage comprise entre 1,0 et 2,5 Mpa, le rapport d'échappement du monoxyde de carbone étant, quant à lui, limité à une plage comprise entre 3 et 15 % du volume réactionnel théorique du monoxyde de carbone, et la vitesse superficielle du liquide s'avère être dans une plage comprise entre 0,2 et 1,0 m/sec.

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