公开(公告)号：US06303777B1

公开(公告)日：2001-10-16

申请号：US08271273

申请日：1994-07-06

申请人： Ju-Nan Kao ,  John Keeney Howie ,  Patrick Joseph Corrigan ,  Richard Gerard Schafermeyer ,  Katherine Eleanor Flynn ,  Nelson James Holzschuh ,  David Joseph Bruno, Jr.

发明人： Ju-Nan Kao ,  John Keeney Howie ,  Patrick Joseph Corrigan ,  Richard Gerard Schafermeyer ,  Katherine Eleanor Flynn ,  Nelson James Holzschuh ,  David Joseph Bruno, Jr.

IPC分类号： C07H1302

CPC分类号： C07H13/06 ,  C08G63/48

摘要： An improved, solvent-free, two-stage transesterification process for preparing, from a polyol and fatty acid esters of an easily removable alcohol highly esterified polyol fatty acid polyesters having reduced levels of difatty ketones and &bgr;-ketoesters is disclosed. These reduced levels of difatty ketones/&bgr;-ketoesters are achieved by controlling the level of generated alcohol in the liquid phase of the reaction mixture and heating the reaction mixture to certain temperatures during the second stage of this improved process. Other optional reaction conditions, such as keeping the molar ratio of fatty acid esters to polyol within a specified range and reducing the level of basic catalyst, can also be used during the second stage reaction to further reduce the level of difatty ketones and/or &bgr;-ketoesters.

摘要翻译： 公开了一种改进的无溶剂的两阶段酯交换方法，用于由具有降低的二甲基酮和β-酮​​酯水平的容易除去的醇高度酯化的多元醇脂肪酸聚酯的多元醇和脂肪酸酯制备。 通过控制反应混合物的液相中产生的醇的水平并在该改进方法的第二阶段将反应混合物加热到某些温度来实现这些降低的酮/β-酮酯水平。 还可以在第二阶段反应期间使用其它任选的反应条件，例如将脂肪酸酯与多元醇的摩尔比保持在指定范围内并降低碱性催化剂的水平，以进一步降低二价酮和/或β的水平 -ketoesters。