PROCESS FOR THE MANUFACTURE OF ACROLEIN FROM PROPYLENE BY A REDOX REACTION AND USE OF A SOLID MIXED OXIDE COMPOSITION AS REDOX SYSTEM IN THE SAID REACTION

摘要

The present invention relates to the use of amixed oxide solid composition of formula (I): Mo[err]W[err]Bi[err]Fe[err]Co[err]Ni[err]Si[err]K[err]Sn[err]O[err] (I)where 0 [err] a [err] 5, 0.5 [err] b [err] 5, 0.1 [err] c [err] 10, 0.5 [err] d [err] 10,0 [err] e [err] 10, 0 [err] f [err] 15, 0 [err] g [err] 1, 0 [err] h [err] 2 and x is thequantity of oxygen bonded to the other elements anddepends on their oxidation states,in the manufacture of acrolein by oxidizing propylene,the said solid composition reacting with propyleneaccording to the redox reaction (1):solid[err] + propylene [err] solid[err] + acrolein' (1) To manufacture acrolein, gaseous propylene ispassed over a solid composition of formula (I), to con-duct the redox reaction (1) by operating at a temperatureof 200 to 600[err]C, at a pressure of 1.01 x 10[err] to 1.01 x 10[err]Pa (0.1 to 10 atmospheres) and with a residence time of0.01 second to 90 seconds, in the absence of molecularoxygen.