A process to refine esters of conjugated linoleic acids via distillation in a single or multi-pass distillation operation is provided. Thermal rearrangement of conjugated linoleic acid components during distillation is prevented or reduced by the use of a low residence time and/or reduced pressure distillation apparatus. A process to produce refined esters of conjugated linoleic acids is also provided. The process transesterifies a linoleic acid-containing oil to generate an alkyl ester composition which further undergoes isomerization at a temperatures typically between about 90-140 °C to form an ester stream containing conjugated linoleic acid esters, which is then distilled to obtain the refined esters of conjugated linoleic acids. The transesterification and isomerization steps can be performed in one reaction vessel without an intervening distillation step. The transesterification and isomerization steps can occur concurrently in a continuous reaction system using a dual reaction zone apparatus. Refined ester compositions produced by the processes and enriched in desirable conjugated linoleic acid isomers are also contemplated.
提供了一种通过单通或多通蒸馏操作来精制
共轭亚油酸酯的过程。通过使用低停留时间和/或降低压力的蒸馏设备,可以防止或减少
共轭亚油酸组分在蒸馏过程中的热重排。还提供了一种生产精制
共轭亚油酸酯的过程。该过程通过
酯交换将含
亚油酸的油转化为生成烷基
酯组合物,然后在通常在约90-140°C之间的温度下进行异构化,形成含有
共轭亚油酸酯的
酯流,然后对其进行蒸馏以获得精制的
共轭亚油酸酯。
酯交换和异构化步骤可以在一个反应容器中进行,而无需中间的蒸馏步骤。
酯交换和异构化步骤可以在连续反应系统中同时进行,使用双反应区设备。此外,还考虑了由这些过程产生的富含理想
共轭亚油酸异构体的精制
酯组合物。