| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a concentrated mixture of methylacetylene with propadiene from crude propylene obtained from an ethylene plant or the like, with low energy.SOLUTION: The method for producing a concentrated mixture of methylacetylene with propadiene comprises the steps of: feeding a crude propylene, which contains propylene as a main component and methylacetylene and propadiene, to a distillation column; and heating the bottom liquid of the distillation column to distill the crude propylene so that the concentrated mixture of methylacetylene with propadiene is produced from the bottom of the distillation column as bottom liquid while obtaining concentrated propylene from the top of the distillation column as overhead gas. The concentrated propylene is compressed adiabatically to raise the condensation temperature thereof and the bottom liquid is heated by the compressed concentrated propylene. |
