| 摘要 |
A process for producing dialkyl succinate from a bio-succinic acid feedstock comprising the steps of: feeding bio-succinic acid to the bottom of a reaction distillation zone column and passing said stream co-currently with upflowing alkanol such that said esterification reaction occurs; removing an overhead vapour stream from the top of the reaction distillation zone column comprising di-ester, alkanol, water of esterification and organic components and passing said stream to an alkanol separation column where the alkanol is separated from the other components; removing a side draw from the alkanol separation column from a point below the feed point thereto, said side draw comprising partially immiscible organic and aqueous phases; passing said side draw to phase separation apparatus where the partially immiscible organic and aqueous phases are separated; passing said organic phase to a column where the dialkyl succinate is separated from the other components; and recovering the dialkyl succinate. |
