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連續醋酸氧化反應裝置

       異丁(ding)烯(xi)氧乙酰化生產(chan)甲基丙烯(xi)醇乙酸(suan)(suan)(suan)酯的(de)(de)方法和反(fan)應系(xi)(xi)統(tong)(tong)(tong)。本系(xi)(xi)統(tong)(tong)(tong)先(xian)用萃(cui)(cui)(cui)取劑將貧(pin)酯相中(zhong)的(de)(de)酯類(lei)萃(cui)(cui)(cui)取出(chu)來(lai)，萃(cui)(cui)(cui)取液(ye)再獨立或與(yu)富酯相一(yi)起送(song)精餾系(xi)(xi)統(tong)(tong)(tong)分(fen)離產(chan)物；萃(cui)(cui)(cui)余(yu)液(ye)中(zhong)僅含(han)有乙酸(suan)(suan)(suan)和水(shui)，部分(fen)調(diao)整乙酸(suan)(suan)(suan)濃度后與(yu)進料(liao)系(xi)(xi)統(tong)(tong)(tong)中(zhong)乙酸(suan)(suan)(suan)物流混合，繼續參與(yu)反(fan)應，另一(yi)部分(fen)去乙酸(suan)(suan)(suan)回收(shou)系(xi)(xi)統(tong)(tong)(tong)回收(shou)乙酸(suan)(suan)(suan)。萃(cui)(cui)(cui)取劑優選(xuan)選(xuan)用系(xi)(xi)統(tong)(tong)(tong)反(fan)應產(chan)物之一(yi)的(de)(de)2亞甲基1,3丙二醇二乙酯，無需外(wai)購萃(cui)(cui)(cui)取劑，同時可(ke)避免向系(xi)(xi)統(tong)(tong)(tong)內添加(jia)除原料(liao)和產(chan)物以外(wai)的(de)(de)物質，保證產(chan)物純度。本反(fan)應系(xi)(xi)統(tong)(tong)(tong)方法具有原子經濟性高、反(fan)應條件易控、能耗低的(de)(de)特點。

  連續醋酸氧(yang)化反應裝(zhuang)置(zhi)，乙醛氧(yang)化制醋酸的基本原(yuan)理：

  乙醛(quan)很(hen)容易被(bei)氧(yang)化，即使在常溫下(xia)，如果吸收空氣中的(de)(de)氧(yang)化，也(ye)能被(bei)氧(yang)化成醋酸(suan)。工業(ye)生(sheng)產醋酸(suan)以(yi)醋酸(suan)錳為(wei)催化劑，反應(ying)方程(cheng)式如下(xia):CHgCHO+1/202<CHCOOH該反應(ying)的(de)(de)產物較為(wei)復雜，除了醋酸(suan)以(yi)外，還(huan)生(sheng)成一定量(liang)的(de)(de)醇、醛(quan)、酯、酐、酮、二氧(yang)化碳等，工業(ye)上為(wei)了得(de)到高純度的(de)(de)醋酸(suan)，應(ying)選擇(ze)合適的(de)(de)工藝流(liu)程(cheng)。