Method for making acrolein from propylene by redox reaction

Details Method for making acrolein from propylene by redox reaction Method for making acrolein from propylene by redox reaction

C - Chemistry, Metallurgy

07

C

C07C 45/28 (2006.01) B01J 23/887 (2006.01) C07C 47/22 (2006.01)

Patent

CA 2351632

The invention concerns the use of a solid composition of mixed oxides of formula (I): Mo¿12?Bi¿a?Fe¿b?Co¿c?Ni¿d?Si¿e?K¿f?Cr¿g?O¿x? 0.5 ? a ?5; 0.1 ? b ? 10; 0.5 ? c ? 10; 0 ? d?10; 0 ? e ? 15; 0 ? f ? 1; 0.1 ? g ? 2; x is the amount of oxygen bound with the other elements and depends on their oxidation conditions, in the production of acrolein by oxidation of propylene, said solid composition reacting with propylene by redox reaction (1): ¿oxidised?SOLID + Propylene ? ¿reduced?SOLID + Acrolein. The method for making acrolein consists in reacting gaseous propylene with a solid composition of formula (I), operating at a temperature ranging between 200 and 600 ·C, under pressure ranging from 1.01 x 10?4¿ to 1.01 x 10?6¿ Pa (0.1 to 10 atmospheres), and with a retention time from 0.01 second to 90 seconds, in the absence of molecular oxygen, thereby producing said redox reaction (1).

La présente invention porte sur l'utilisation d'une composition solide d'oxydes mixtes de formule (I): Mo12BiaFebCocNidSieKfCrgOx; 0,5 a 5; 0,1 b 10; 0,5 c 10; 0 d 10; 0 e 15; 0 f 1, 0,1 g 2; x est la quantité d'oxygène lié aux autres éléments et dépend de leurs états d'oxydation, dans la fabrication de l'acroléine par oxydation du propylène, ladite composition solide réagissant avec le propylène selon la réaction redox (1): SOLIDEoxydé + Propylène SOLIDEréduit + Acroléine. Pour fabriquer l'acroléine, on fait réagir du propylène gazeux avec une composition solide de formule (I), en opérant à une température de 200 à 600 ~C, sous une pression de 1,01 x 104 à 1,01 x 106 Pa (0,1 à 10 atmosphères), et avec un temps de séjour de 0,01 seconde à 90 secondes, en l'absence d'oxygène moléculaire, réalisant ainsi la réaction redox (1) ci-dessus.

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