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US 4,363,751 AGranted
Catalyst for the preparation of 4-cyanothiazole and process for preparing the catalyst
AssigneeMerck & Co., Inc.
InventorsStuart Bacher, Carlos B. Rosas, John J. Sharkey
Life of this patent
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Abstract
An improved process for the preparation of 4-cyanothiazole from 4-methylthiazole using an ammoxidation catalyst composed of manganese, chromium and molybdenum is disclosed.
Claims17
An ammoxidation catalyst which consists of manganese, chromium and molybdenum oxides in the molecular ratios of:
- Mn.sub.a Cr.sub.b Mo.sub.1.00 O.sub.x wherein a and b are from 0.02 to 15 provided the sum of a and b is not less than 0.8 and x is a number which satisfies the valences of the metallic elements.
An ammoxidation catalyst which consists of manganese, chromium and molybdenum oxides in the molecular ratio of:
- Mn.sub.a Cr.sub.b Mo.sub.1.00 O.sub.x wherein a and b are from 0.02 to 15 provided the sum of a and b is not less than 0.8, and x is a number which satisfies the valence of the metallic elements, prepared by dissolving soluble salts of manganese, chromium and molybdenum in water, drying the aqueous mixture and calcining the dried material at about 450.degree. C. for about 16 hours.
Dependencies are inferred from the claim text.