| 摘要 |
A process for recovering product dialkyl succinate and/or dialkyl maleate from an overhead stream from an esterification reaction column, said overhead stream comprising as a major component alkanol and water and as a minor component the product dialkyl succinate and /or dialkyl maleate which forms an azeotrope with the water, wherein said process comprises washing the overhead stream with butanol. In another aspect, a process for the manufacture of 1,4-butanediol with optional co-products tetrahydrofuran and/or γ-butyrolactone and by-product butanol comprising: forming dialkyl succinate and/or dialkyl maleate in a reaction column; removing the dialkyl succinate and/or dialkyl maleate from at or near the reaction column bottom and further treating the ester to form 1,4-butanediol with optional co-products tetrahydrofuran and/or γ-butyrolactone and by-product butanol; recovering dialkyl succinate and/or dialkyl maleate from an overhead stream from the reactor column as described above. |
