| 摘要 |
A method of saturating ethylene-containing gases (I) with acetic acid (A), before they are fed into vinyl acetate reactor, comprises introducing recovered (A) from vinyl acetate process into column (B), having a countercurrent stripping and rectification section. (I) fed in via the bottom is saturated with (A). Recovered (A) and fresh (A) are introduced into the stripping and rectification section, respectively. A method of saturating ethylene-containing gases (I) with acetic acid (A), before they are fed into a vinyl acetate reactor, comprises introducing (A) recovered in the vinyl acetate process in to a column (B) in which (I) fed in via the bottom is saturated with (A), where (B) has a countercurrent stripping section and a rectification section. Recovered (A) is introduced into the countercurrent stripping section and/or the rectification section and fresh (A) is introduced into the rectification section. The liquid taken off from (B) is divided into two substreams, and one substream is pumped back into (B) with maintenance of a minimum pumped circulation required for sufficient saturation with (A). This substream is monitored in terms of safety, and is heated in a heat exchanger arranged in parallel to at least one further heat exchanger before entering (B), and the other substream is discharged. |
