PROCESS FOR PREPARING 2-METHYLPYRIDINE AND 4- METHYLPYRIDINE

摘要

ABSTRACT OF THE DISCLOSUREA process for preparing simultaneously pyridine basesincluding 2-methylpyridine and 4-methylpyridine, occasionally,together with pyridine from acetaldehyde and ammonia by gasphase catalytic reaction, characterized in that the gas phasecatalytic reaction is conducted in the presence of a catalystprepared by (A) incorporating at least one compound contain-ing at least one metal selected from the group consisting oftungsten, manganese, nickel, iron, cobalt, molybdenum, uranium,lead, silver, copper and tin into silica-alumina simultaneous-ly with preparation of the silica-alumina, or (B) subjectingsilica-alumina to ion exchange with ions of at least onemetal selected from the group consisting of manganese, nickel,iron, cobalt, uranium, lead, silver, copper and tin to adsorbthe ions on said silica-alumina. According to the process ofthe present invention, there can be obtained the desiredpyridine bases in high yield, whereas formation of by-productsincluding high boiling point pyridine derivatives is remarkablysuppressed. The catalyst employed in the present process hasa high resistance to the reaction atmosphere. Pyridine basesare important solvents and valuable intermediates for use inthe product of dyes, medicines and agricultural chemicals.