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US 10,479,760 B2Granted
Synthetic methods for the preparation of propylene ammoxidation catalysts
AssigneeClariant GmbH
InventorsClaus G. Lugmair, Hailian Li
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Abstract
The present disclosure relates generally to catalyst materials and processes for making and using them. More particularly, the present disclosure relates to molybdenum, bismuth and iron-containing metal oxide catalyst materials useful, for example, in the partial oxidation or ammoxidation of propylene or isobutylene, processes for making them, and processes for making acrolein, methacrolein, acrylonitrile, and methacrylonitrile using such catalysts.
Claims19
A process for producing a catalyst material, the catalyst material comprising
- an inert carrier having a specific surface of 1 to 500 m2/g in an amount in the range of about 25 wt % to about 75 wt %, and
- a metal oxide catalyst in an amount in the range of about 25 wt % to about 75 wt %, the metal oxide catalyst having the formula MoxBiyFezNiaCeb1Mab2Mnb3Kd1Csd2Ov, wherein
- x is in the range of 12 to 14;
- y is in the range of 0.05 to 0.4;
- z is in the range of 1 to 2.5;
- a is in the range of 5 to 7;
- b1 is in the range of 0.2 to 0.6;
- b2 is in the range of 1 to 3;
- b3 is in the range of 0.1 to 1.0;
- d1 is in the range of 0.01 to 0.15;
- d2 is in the range of 0.01 to 0.8;
- and
- v is the number of oxygen atoms required to satisfy the valence requirements of the other component elements Mo, Bi, Fe, Ni, Ce, Mg, Mn, K, and Cs,
- the process comprising:
- providing a metal oxide precursor fluid comprising a solvent in admixture with a plurality of metal oxide precursors, the plurality of metal oxide precursors comprising at least
- a molybdenum oxide precursor,
- a bismuth oxide precursor, and
- an iron oxide precursor,
- wherein less than about 20 wt % of each of the molybdenum oxide precursor, the bismuth oxide precursor, and the iron oxide precursor is not dissolved in the solvent;
- impregnating the inert carrier with the metal oxide precursor fluid to provide impregnated carrier;
- drying the impregnated carrier to provide a dried, impregnated carrier;
- and
- heating the dried, impregnated carrier to provide the catalyst material.
20 more elements
Dependencies are inferred from the claim text.