Catalyst for preparation of 4-cyanothiazole
AssigneeMerck & Co., Inc.
InventorsGlenn R. Elion, Arthur E. Klink
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Abstract
4-Cyanothiazole is prepared by the catalytic vapor phase ammoxidation of .DELTA.3-4-methylthiazoline or 4-methylthiazole, using as catalyst a novel composition comprising a slurried chromium cobalt molybdate. The process affords high selectivity in the production of 4-cyanothiazole.
Claims3
A catalyst composition prepared by the process of adding to a solution of chromium chloride and cobalt molybdate a compound selected from the group consisting of potassium hydroxide, ferric chloride, ammonium orthophosphate, telluric acid, potassium sulfate and vanadyl sulfate wherein the molar ratio of molybdenum:cobalt is from 1.20:1.00 to 1.05:1.00;
- the molar ratio of the chromium chloride:cobalt molybdate is 0.6:1 to 1.4:1 and the molar ratio of a compound selected from said group to cobalt molybdate is 0.01:1 to 0.08:1 for potassium hydroxide;
- 0.001:1 to 0.01:1 for ferric chloride;
- 0.001:1 to 0.04:1 for ammonium orthophosphate;
- 0.01:1 to 0.05:1 for telluric acid;
- 0.01:1 to 0.08:1 for potassium sulfate;
- and 0.01:1 to 0.08:1 for vanadyl sulfate, and drying
A catalyst composition consisting essentially of chromium chloride:cobalt molybdate wherein the molar ratio of molybdenum:cobalt is from 1.20:1.00 to 1.05:1.00 and the molar ratio of chromium
Dependencies are inferred from the claim text.