申请人:BASF Aktiengesellschaft
公开号:US04310705A1
公开(公告)日:1982-01-12
An improved process for the preparation of higher unsaturated ketones, such as geranylacetone and farnesylacetone, by reacting a .beta.,.gamma.-unsaturated alcohol and an alkyl acetoacetate at an elevated temperature in the presence of an organic aluminum compound, with elimination, and removal, of the alcohol derived from the alkyl acetoacetate in a reactor system carrying a fractionating column. The improvement in the purity, yield, and especially space-time yield of the product is achieved by starting from an alcohol having a higher boiling point than that of the alkyl acetoacetate used, carrying out the reaction in the presence of a small amount of an inert liquid which has a boiling point between that of the alkyl acetoacetate and the alcohol to be eliminated therefrom, and ensuring that the temperature at the bottom of the fractionating column is only slightly higher than the boiling point of the added liquid, under the prevailing pressure.
一种改进的制备高不饱和酮的方法,例如香叶醇酮和法尼醇酮,通过在有机铝化合物存在下,在升高的温度下反应β,γ-不饱和醇和烷基乙酰乙酸酯,通过消除和去除从烷基乙酰乙酸酯中得到的醇,在带有分馏柱的反应器系统中实现。通过从沸点高于所使用的烷基乙酰乙酸酯的醇开始,以少量惰性液体的存在,在反应中保持沸点在烷基乙酰乙酸酯和要从中消除的醇之间,并确保分馏柱底部的温度仅略高于所添加液体的沸点,在适当的压力下实现了产品的纯度,产量和特别是空间时间产量的提高。