| 摘要 |
The process for the distillation of a gas mixture comprising (meth)acrylic acid obtained from the gas-phase oxidation of at least one (meth)acrylic acid precursors is improved through the use of coupled distillation columns. In a first column, the gaseous mixture is dehydrated while in a second column, the dehydrated gaseous mixture is distilled into product, overhead and bottoms streams. The process also benefits from the use of one or more inhibitors during the process, the inhibitors being selected from compounds that inhibit the reaction of acrylic acid and being included in an amount sufficient to prevent or reduce the polymerization of acrylic acid. |
