In situ modification of molybdenum-based catalysts

Details In situ modification of molybdenum-based catalysts In situ modification of molybdenum-based catalysts

2006-05-02

2009-08-18

Shiao, Rei-tsang (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitriles

Reexamination Certificate

active

07576232

ABSTRACT:
A process for the conversion of a hydrocarbon selected from the group consisting of propylene, isobutylene, propane, isobutane or mixtures thereof, to acrylonitrile, methacrylonitrile, or mixtures thereof, the process comprising the step of reacting in the vapor phase at an elevated temperature and pressure said hydrocarbon with a molecular oxygen-containing gas and ammonia, in the presence of a molybdenum-based ammoxidation catalyst and a catalyst modifier, wherein said catalyst modifier comprises a molybdate or a polymolybdate of at least one element M selected from the group consisting of cesium, rubidium, potassium, sodium, thallium, lithium, nickel, cobalt, iron, chromium, copper, magnesium, manganese, cerium and phosporus, and wherein the ratio of the M elements to Mo in the molybdate or polymolybdate is greater than the ratio for these M elements to Mo in the molybdenum-based catalyst. The catalyst modifier is useful in modifying the performance of molybdenum-based catalyst and inhibiting molybdenum oxide loss for such catalysts.

REFERENCES:
patent: 5175334 (1992-12-01), Suresh et al.
patent: 6458742 (2002-10-01), Paparizos et al.
patent: 7071140 (2006-07-01), Paparizos et al.
patent: 7348291 (2008-03-01), Paparizos et al.

Affiliated with

Also associated with

Rating

In situ modification of molybdenum-based catalysts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with In situ modification of molybdenum-based catalysts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In situ modification of molybdenum-based catalysts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4118051