β─紫罗兰酮的生产

Manufacture of β─ionones

研究假性紫罗兰酮在浓硫酸中环化制备β－紫罗兰酮的工艺条件。反应介质为脂肪烃或氯代脂肪烃和低级醇的混合物。β－紫罗兰酮的摩尔得率８３％以上，产品中紫罗兰酮的总含量＞９８％，β－紫罗兰回含量＞９５％。

This article deals with the technological conditions for the manufacture of β─ionones by cyclitation of pseudoionones with sulfnric acid,using the mixtures of hydro carbons or chlorinated hydrocarbons and lowe alcohols as the reaction medium.The yield of β─ionones is more than83%,the concentration of ionones in product is more than 98% and β─ionones more than 95%.