| 摘要 |
FIELD: organic chemistry. SUBSTANCE: invention refers to using a flocculating and sequestering agent with the organic solution as an agent to facilitate such purification. A method of purifying an organic solution, comprising contacting a flocculating and sequestering agent with the organic solution, which organic solution comprises fatty acid alkyl esters, wherein the water content of the organic solution is equal or less than 5% by weight, when the pH in the organic solution is 9 to 12, wherein the flocculating and sequestering agent is chosen from polyaluminium coagulants. There is provided a process for purification of an organic solution of fatty acid alkyl esters suitable for use as biodiesel, comprising: adding a flocculating and sequestering agent chosen from polyaluminium coagulants to the organic solution so as to facilitate the purification when the pH in the organic solution is 9 to 12 and removing a portion from the organic solution, which portion comprises the flocculating and sequestering agent, and impurities, wherein the water content of the organic solution is equal or less than 5% by weight. ^ EFFECT: process will enable less energy input and becomes less time-consuming and less costly, as compared to the known processes using water to purify the organic solution. ^ 10 cl, 3 tbl, 12 ex |
