Production of (amm)oxidation catalyst

Claim 2

A process for the production of an (amm) oxidation catalyst comprising: Individually forming the molybdate of at least one of the elements in the group consisting essentially of cobalt, nickel and iron and an oxide or salt of bismuth; thereafter forming an aqueous slurry consisting essentially of the individual molybdates and bismuth oxide or salt; separating the solid phase from the slurry, and calcining the solid phase to form the catalyst.

Claim 3

A process according to claim 1 in which the slurry also contains a phosphate radical and an ion of an element selected from the group consisting of sodium, potassium and calcium.

Claim 4

A process according to claim 1 in which a finely divided support material is added to the slurry.

Claim 5

The process according to claim 1 wherein a silica sol support material is added to the slurry and the calcining of the solid phase is at a temperature above 450° C.

Claim 6

A process for the production of an (amm)oxidation catalyst which comprises forming an aqueous slurry containing: a. the individually prepared molybdates of cobalt, nickel and iron, and bismuth oxide or salt, b. a phosphate radical, c. an ion of an element selected from the group consisting of sodium, potassium and calcium adding to the slurry a silica sol support material, separating a solid phase from the slurry and calcining said solid phase at a temperatue of from 500° to 650° to form the catalyst.

Claim 7

A process for the production of an (amm)oxidation catalyst which comprises forming an aqueous slurry containing: a. the individually prepared molybdates of cobalt, nickel and iron, and bismuth oxide or salt, b. a phosphate radical, c. an ion of an element selected from the group consisting of sodium, potassium and calcium adding to the slurry a silica sol support material, separating a solid phase from the slurry and calcining said solid phase at a temperatue of from 500° to 650° to form the catalyst.

Claim 8

A process according to claim 5 in which the aqueous slurry is formed by mixing an aqueous slurry containing the molybdates of cobalt, nickel and iron and a bismuth oxide or salt with a solution of a phosphate of sodium, potassium or calcium.

Claim 9

A process according to claim 5 in which the aqueous slurry is formed by mixing a slurry containing the molybdates of cobalt, nickel and iron and a bismuth oxide or salt with an aqueous solution containing the molybdate of sodium, potassium or calcium and phosphoric acid.

Claim 10

A process according to claim 1 in which the catalytic elements are added in amounts sufficient to give a catalyst with the catalytic elements present in the following ratio: Mo.sub.10 Co.sub.1-5 Ni.sub.1-5 Fe.sub.1-5 Bi.sub.0.1-3

Claim 11

A process according to claim 5 in which the catalytic elements are added in amounts sufficient to give a catalyst with the catalytic elements present in the following ratio: Mo.sub.10 Co.sub.1-5 Ni.sub.1-5 Fe.sub.1-5 Bi.sub.0.1-3 P.sub.0.1-3 K.sub.0.1-3 dispersed on the silica support material which provides from 30 to 70% of the supported catalyst weight.

Claim 12

A process for the production of an (amm)oxidation catalyst which comprises forming an aqueous slurry of individually prepared molybdates of cobalt, nickel, iron and bismuth, mixing the slurry with a silica sol and an aqueous solution of potassium phosphate, separating a solid phase from the slurry, spray-drying said solid phase to remove water and calcining the dried solid phase at a temperature above 450° C to form the catalyst, the above components being added in such proportions that the silica support comprises 30 to 70% of the supported catalyst weight, and the catalyst itself has the empirical formula: Mo.sub.10 Co.sub.1-5 Fe.sub.1-5 Ni.sub.1-5 Bi.sub.0.1-3 P.sub.0.1-3 K.sub.0.1-3 O.sub.14.5-106

Claim 13

A process for the production of an (amm)oxidation catalyst which comprises forming an aqueous slurry of individually prepared molybdates of cobalt, nickel, iron and bismuth, mixing the slurry with a silica sol and an aqueous solution of potassium phosphate, separating a solid phase from the slurry, spray-drying said solid phase to remove water and calcining the dried solid phase at a temperature above 450° C to form the catalyst, the above components being added in such proportions that the silica support comprises 30 to 70% of the supported catalyst weight, and the catalyst itself has the empirical formula: Mo.sub.10 Co.sub.1-5 Fe.sub.1-5 Ni.sub.1-5 Bi.sub.0.1-3 P.sub.0.1-3 K.sub.0.1-3 O.sub.14.5-106