Improved method for the manufacture of acrylic acid

Details Improved method for the manufacture of acrylic acid Improved method for the manufacture of acrylic acid

C - Chemistry, Metallurgy

07

C

C07C 57/055 (2006.01) C07C 45/35 (2006.01) C07C 51/25 (2006.01) C07C 57/05 (2006.01) B01J 23/887 (2006.01) C07C 47/22 (2006.01)

Patent

CA 2437256

A process for the manufacture of acrylic acid comprising reacting propylene and oxygen (preferably in the form of air) in a reaction zone having a catalyst characterized by the following formula: AaBbCcCadFeeBifMo12=Ox, where A = one or more of Li, Na, K, Rb and Cs; B = one or more of Mg, Sr, Mn, Ni, Co and Zn; C = one or more of Ce, Cr, Al, Sb, P, Ge, Sn, Cu, V and W and; a = 0.01 to 1.0; b and e = 1.0 - 10; c = 0 to 5.0, preferably 0.05 to 5.0, especially preferred being 0.05 to 4.0, and x is a number determined by the valence requirements of the other elements present; at an elevated temperature to produce acrylic acid and acrolein.

L'invention concerne un procédé de production d'acide acrylique consistant à faire réagir du propylène et de l'oxygène (de préférence sous la forme d'air) dans une zone de réaction comportant un catalyseur caractérisé par la formule suivante : A¿a?B¿b?C¿c?Ca¿d?Fe¿e?Bi¿f?Mo¿12?O¿x? dans laquelle A = un ou plusieurs Li, Na, K, Rb et Cs, B = un ou plusieurs Mg, Sr, Mn, Ni, Co et Zn, C = un ou plusieurs Ce, Cr, Al, Sb, P, Ge, Sn, Cu, V et W, et a = 0,01 à 1,0 ; b et e = 1,0-10, c = 0 à 5,0, de préférence 0,05 à 5,0, et idéalement 0,05 à 4,0, d et f = 0,05 à 5,0 et x représente un nombre déterminé par les conditions de valence des autres éléments présents ; à une température élevée afin de produire un acide acrylique et une acroléine.

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