Process for the preparation of a highly active and selective amm

Details Process for the preparation of a highly active and selective amm Process for the preparation of a highly active and selective amm

1996-03-12

1999-06-08

Rotman, Alan L.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Phosphorus or compound containing same

502212, 502214, 546286, B01J 27198, B01J 27192, B01J 27182

Patent

active

059104651

ABSTRACT:
This invention relates to a process for the preparation of highly active and selective ammoxidation catalyst of formula (VO).sub.2 P.sub.2 O.sub.7 ,TiO.sub.2 or (VO).sub.2 P.sub.2 O.sub.7, Al.sub.2 O.sub.3, which process comprises refluxing a vanadium source in the presence of alcohols; adding a source of phosphorous to form vanadyl pyrophosphate hydrate (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 or (VO).sub.2 P.sub.2 O.sub.7.2H.sub.2 O ; Physical mixing of (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 with oxides selected from titania or alumina, and heating the resultant mixture in the presence of air at a temperature in the range of 300-600.degree.C. for a period in the range of 1 to 10 hours; and the use of said ammoxidation catalyst in the preparation of heteroaromatic nitrites.

REFERENCES:
patent: 4778890 (1988-10-01), Shimizu et al.
patent: 4939260 (1990-07-01), Inoue et al.
patent: 4963687 (1990-10-01), Saito et al.

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