申请人:Koei Chemical Co., Ltd.
公开号:US03946020A1
公开(公告)日:1976-03-23
Pyridine bases are produced in higher yield from at least one of aliphatic carbonyl compounds and ammonia by reaction at 350.degree. to 550.degree.C under the atmospheric pressure at a space velocity of 100 to 10,000 hr.sup.-.sup.1 in the presence of a catalyst prepared by immersing silica-alumina or a silica-alumina mixture containing a promoter in an aqueous solution of ammonium halide such as ammonium chloride, ammonium iodide or ammonium bromide at a concentration of not more than 20% by weight at room temperature to 80.degree.C, washing the immersed silica-alumina or the mixture with water, and drying and calcining the same at 300.degree.C or higher. Regeneration of the catalyst after the reaction can be carried out for a much shortened time.
在大气压下,以100到10,000 hr.sup.-.sup.1的空间速度,在350℃至550℃的条件下,利用浸渍有氯化铵、碘化铵或溴化铵等铵盐的水溶液制备的催化剂,催化至少一种脂肪族羰基化合物和氨反应,可产生更高产量的吡啶碱。浸渍的硅铝或含有助剂的硅铝混合物在室温至80℃时,铵盐的浓度不超过20%。将浸渍的硅铝或混合物用水洗涤,然后在300℃或更高温度下干燥和焙烧。反应后可以进行催化剂再生,时间大大缩短。