| 摘要 |
<p>A process to prepare a concentrate comprising a tocopherol compound is disclosed. The process comprises the following sequence of steps: (i) an evaporation step (10) in a first evaporator (20) of a feed stream (30) comprising a fatty acid or its ester, and a tocopherol compound (1), wherein a first residue stream (50) and a first volatile stream (60) are separated in the evaporation step (10), (ii) a first distillation step (70) in a first distillation apparatus (80) of the first volatile stream (60) to remove a second residue stream (90) and a second volatile stream (100) and to form a volatile product concentrate stream (110), characterized in that the first evaporator (20) is a thin film or short-path evaporator, the distillation apparatus (80) comprises at least two columns (81, 82), and wherein the concentration of the tocopherol compound (1) in the feed stream is from 1 to 30 % on a weight basis. The present invention also relates to a process to prepare said concentrate from a vegetable oil (160) and an apparatus (1000) for said process to prepare said concentrate from said vegetable oil.</p> |
