Process for the manufacture of acrylonitrile and methacrylonitrile
AssigneeThe Standard Oil Company
InventorsDev D. Suresh, Maria S. Friedrich, Michael J. Seely
Life of this patent
Estimating the term…
Abstract
Olefins such as propylene and isobutylene are converted to the corresponding unsaturated nitriles, acrylonitrile, and methacrylonitrile, respectively, by reacting a mixture of the olefin, ammonia, and molecular oxygen-containing gas in the presence of a catalyst containing the oxides of bismuth, molybdenum, iron, nickel and magnesium, at least one element selected from the group comprising potassium and cesium, and optionally one element selected from the group comprising cobalt, phosphorus, manganese, tellurium, sodium, cerium, chromium, antimony and tungsten wherein the sum of cesium and potassium is at least 0.1 to 0.4
Claims13
In the process for the conversion of an olefin selected from the group consisting of propylene, isobutylene and mixtures thereof, to acrylonitrile, methacrylonitrile and mixtures thereof respectively by reacting in the vapor phase at a temperature of from about 260.degree. to 600.degree. and at an elevated pressure said olefin with a molecular oxygen-containing gas and ammonia in the presence of a oxide catalyst, the improvement comprising:
- conducting the reaction in the presence of a catalyst having the following empirical formula:
- A.sub.a K.sub.b Cs.sub.c Mg.sub.d Ni.sub.e Fe.sub.f Bi.sub.g Mo.sub.12 O.sub.x
- wherein
- A is Co, Mn, Cr, P, Sb, Te, Na, Ce, W or mixtures thereof;
- and
- wherein
- a is a number from 0 to 5;
- b is a number greater than 0 to 0.4;
- c is a number greater than 0 to 0.4;
- provided that the sum of b and c is from 0.1 to 0.4;
- d, e, f, and g are numbers from about 0.2 to 10;
- and
- x is a number determined by the valence requirements of the other elements present.
Dependencies are inferred from the claim text.