Pyridine base synthesis process and catalyst for same
AssigneeReilly Industries, Inc.
InventorsGerald I. Goe, Robert D. Davis
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Abstract
An improved base synthesis process and catalyst for the preparation of pyridine or its alkylpyridine derivatives involving the catalytic reaction of one or more aldehydes and/or ketones containing from one to about five carbon atoms, with at least one reactant having more than one carbon atom, with ammonia in the gas phase. The improved catalyst comprises an effective amount of a shape-selective zeolite which has been modified by treatment with one or more metal ions or compounds of tungsten. zinc or tin. The preferred zeolite has a constraint index of about 1 to 12 and a high silica content and correspondingly low concentration of ion-exchange sites with minimal to no acidic sites present.
Claims15
A base synthesis process for the preparation of pyridine or its alkylpyridine derivatives in high yield comprising reacting a C.sub.2 to C.sub.5 aldehyde, a C.sub.3 to C.sub.5 ketone or a mixture thereof, with ammonia and, optionally, formaldehyde, in the gas phase and in the presence of an effective amount of a modified zeolite catalyst having a constraint index of about 1 to 12 which has been treated with one or more ions of or compounds containing tungsten, zinc or tin.
Dependencies are inferred from the claim text.