| 发明名称 |
Process for purifying a crude ethanol product |
| 摘要 |
In one embodiment, the invention is to a process for purifying a crude ethanol product. The process comprises the step of hydrogenating acetic acid in a first reaction zone in the presence of a first catalyst to form the crude ethanol product comprising ethanol, acetaldehyde, acetic acid, water, and acetal. The process further comprises the step of separating at least a portion of the crude ethanol product into a refined ethanol stream and a by-product stream. The refined ethanol stream comprises ethanol and acetaldehyde; and the by-product stream comprises acetic acid and a substantial portion of the water from the crude ethanol product. The process further comprises the step of hydrolyzing in a second reaction zone at least a portion of the acetal. |
| 申请公布号 |
US8748676(B2) |
申请公布日期 |
2014.06.10 |
| 申请号 |
US201113197748 |
申请日期 |
2011.08.03 |
| 申请人 |
Celanese International Corporation |
发明人 |
Orosco Adam;Sarager Lincoln;Warner R. Jay;Jevtic Radmila |
| 分类号 |
C07C27/04 |
主分类号 |
C07C27/04 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A process for purifying a crude ethanol product, comprising the steps of:
(a) hydrogenating acetic acid in a first reaction zone in the presence of a first catalyst to form the crude ethanol product comprising ethanol, acetaldehyde, acetic acid, water, and acetal; (b) separating at least a portion of the crude ethanol product into a refined ethanol stream comprising ethanol and acetaldehyde; and a by-product stream comprising acetic acid and a substantial portion of the water from the crude ethanol product; and (c) hydrolyzing in a second reaction zone at least a portion of the acetal in at least one of the crude ethanol product or the refined ethanol stream in the presence of an acidic catalyst at a temperature of between 90 and 130° C., wherein the second reaction zone comprises a catalyst bed.
|
| 地址 |
Dallas TX US |
