US 12,343,708 B2
Method for producing a catalytically active multi-element oxide containing the elements Mo, W, V and Cu
Kazuhiko Amakawa, Ludwigshafen am Rhein (DE); Samira Parishan, Ludwigshafen am Rhein (DE); Christian Walsdorff, Ludwigshafen am Rhein (DE); Patrick Hubach, Ludwigshafen am Rhein (DE); and Tobias Weinland, Ludwigshafen am Rhein (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/918,345
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Apr. 12, 2021, PCT No. PCT/EP2021/059382
§ 371(c)(1), (2) Date Oct. 12, 2022,
PCT Pub. No. WO2021/213823, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 20170533 (EP), filed on Apr. 21, 2020.
Prior Publication US 2023/0144424 A1, May 11, 2023
Int. Cl. B01J 23/888 (2006.01); B01J 6/00 (2006.01); B01J 8/02 (2006.01); B01J 35/61 (2024.01); B01J 37/00 (2006.01); B01J 37/08 (2006.01); C07C 51/235 (2006.01)
CPC B01J 23/8885 (2013.01) [B01J 6/004 (2013.01); B01J 8/02 (2013.01); B01J 35/613 (2024.01); B01J 37/0045 (2013.01); B01J 37/08 (2013.01); C07C 51/235 (2013.01); C07C 2523/888 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A process for producing a catalytically active multielement oxide comprising the elements Mo, W, V, Cu and optionally Sb, wherein the ratio of the elements conforms to the general formula (I)
Mo12WaVbCucSbd   (I)
where
a=0.4 to 5.0,
b=1.0to 6.0,
c=0.2 to 1.8 and
d=0.0 to 2.0,
and the molar proportion of the element Mo in the total amount of all non-oxygen elements is from 5 to 95 mol %, which comprises
a) using at least one source of the elemental constituents W of the multielement oxide to produce an aqueous solution or aqueous suspension,
b) admixing the aqueous solution or aqueous suspension obtained in a) with sources of the elemental constituents Mo, V and optionally Sb of the multielement oxide,
c) admixing the aqueous solution or aqueous suspension obtained in b) with sources of the elemental constituents Cu and optionally Sb of the multielement oxide,
d) drying the aqueous solution or aqueous suspension obtained in c) and optionally comminuting to produce a powder P,
e) optionally using the powder P obtained in d), optionally with addition of one or more shaping auxiliaries and after homogeneous mixing, to obtain geometric shaped precursor bodies from the resulting mixture, and
f) subjecting the powder P obtained in d) or the geometric shaped precursor bodies obtained in e) to thermal treatment to form the catalytically active multielement oxide,
wherein the aqueous solution or aqueous suspension used in d) comprises from 1.6% to 5.0% by weight of W and from 7.2% to 26.0% by weight of Mo, based in each case on the total amount of aqueous solution or aqueous suspension.