发明名称 |
METHOD AND DEVICE FOR RECOVERING ETHYLENE DURING PROCESS FOR PRODUCING VINYL ACETATE |
摘要 |
The present invention discloses a method and a device for recovering ethylene during the process for producing vinyl acetate, wherein a double solvent absorption method composed of an absorbent solution and deionized water is adopted. The method is as follows: introducing an outlet stream as an absorbent solution from the upper section of the feeding plate in an acetic acid tower during the rectification stage of vinyl acetate production; delivering same to the top of the lower section of the ethylene recovery tower by a delivery pump; charging refined gas from the tower bottom of the ethylene recovery tower for contacting with the absorbent solution in a counter-current; delivering the absorption bottom solution to the rectification stage for treatment; the gas continuing to rise to the upper section of the ethylene recovery tower and contacting with the deionized water introduced from the top of the tower in a counter-current; absorbing and removing the acetic acid therein; and discharging the residual inert gas, such as N2, from the top of the ethylene recovery tower. The absorbent solution is a mixture of acetic acid, vinyl acetate and water, and comprises by weight percentage of 50-85 % acetic acid, 5-30 % vinyl acetate and 5-20 % water. |
申请公布号 |
EP2778149(A4) |
申请公布日期 |
2015.06.24 |
申请号 |
EP20120848642 |
申请日期 |
2012.11.06 |
申请人 |
TIANJIN UNIVERSITY |
发明人 |
ZHANG, MINHUA;DONG, XIUQIN;LIU, CHENG;TAO, MINLI;LI, YONGHUI;LU, HUISHENG;YU, YINGZHE;GENG, ZHONGFENG |
分类号 |
C07C11/04;B01D53/14;B01D53/18;C07C7/11 |
主分类号 |
C07C11/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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