| 发明名称 |
Method for the Continuous Dehydration of 3-hydroxypropionic Acid to Form Acrylic Acid |
| 摘要 |
The invention relates to a process for dehydrating aqueous 3-hydroxypropionic acid to acrylic acid, wherein an aqueous mixture of 3-hydroxypropionic acid and oligomeric 3-hydroxypropionic acid is converted to acrylic acid in the liquid phase in a first step and aqueous acrylic acid is distilled out of the liquid phase, and the aqueous acrylic acid is separated by distillation into an acrylic acid-rich phase and a water-rich phase in a second step. |
| 申请公布号 |
US2017081268(A1) |
申请公布日期 |
2017.03.23 |
| 申请号 |
US201515311541 |
申请日期 |
2015.05.13 |
| 申请人 |
BASF SE |
发明人 |
Blaschke Tim;Lang Ortmund;Zajaczkowski-Fischer Marta;Hartmann Marco |
| 分类号 |
C07C51/46;C07C51/377;C07C51/43 |
主分类号 |
C07C51/46 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A process for continuously dehydrating aqueous 3-hydroxypropionic acid to acrylic acid, which comprises, in a first step i), converting an aqueous mixture of 3-hydroxypropionic acid and oligomeric 3-hydroxypropionic acid to acrylic acid in the liquid phase and at a pressure of less than 900 mbar and separating aqueous acrylic acid from the liquid phase by distillation and, in a second step ii), separating the aqueous acrylic acid obtained in step i) at a pressure of less than 900 mbar, by distillation into an acrylic acid-rich phase and a water-rich phase. |
| 地址 |
Ludwigshafen DE |
