| 发明名称 |
Pure carboxylic acid filtration |
| 摘要 |
The present invention relates to a process for production of pure terephthalic acid comprising: a) removing a mother liquor from a terephthalic acid through a filter with a gas, wherein the gas comprises steam at a concentration of least about 50% by volume; b) purifying the gas; and c) recycling the gas purified in step (b) back to step (a). |
| 申请公布号 |
US9199905(B2) |
申请公布日期 |
2015.12.01 |
| 申请号 |
US200913126640 |
申请日期 |
2009.10.30 |
| 申请人 |
INVISTA North America S.a.r.l. |
发明人 |
Jackson Christopher H.;Limbach Anthony Peter John;McDonnell Finbar Gerald;Ure Alan MacPeherson |
| 分类号 |
C07C51/265;C07C51/47 |
主分类号 |
C07C51/265 |
| 代理机构 |
|
代理人 |
Simmons William J. |
| 主权项 |
1. A process for production of pure terephthalic acid comprising:
(a) removing a mother liquor from a purified terephthalic acid through a filter with a gas, wherein the gas comprises steam at a concentration in a range of from 85 weight % to 95 weight % of the total gas; (b) purifying the gas to remove volatile impurities, wherein the purifying is in a gas-liquid contact device and wherein said gas-liquid contact device is a scrubber; and (c) recycling the gas purified in step (b) back to step (a). |
| 地址 |
Wilmington DE US |
