论文部分内容阅读
前言上海石化总厂化工二厂乙醛氧化装置中,乙烯氧化成乙醛的反应,在强氧化、强腐蚀条件下进行,反应条件如下: 温度:125℃压力:3kg/cm~2(表压) 采用PdCl_2、CuCl_2为催化剂,其配比为每10m~3含:纯水5m~3、CuCl_2 1900kg、PdCl_2 7kg、HAC 120kg;pH1.2—1.5(用HCl调节)。上述液相催化介质,在流程中循环使用。装置中有许多管道的材料选用纯钛,而垫圈、法兰等,却选用Ti—0.2Pd合金,这
Preface The reaction of ethylene oxidation to acetaldehyde in the second plant of Shanghai Petrochemical Plant Chemical Plant acetaldehyde oxidation is carried out under strong oxidation and strong corrosion conditions. The reaction conditions are as follows: Temperature: 125 ° C Pressure: 3 kg / cm ~ 2 ) Using PdCl 2 and CuCl 2 as catalyst, the ratio is 10m 3 for every 10m 3, pure water 5m 3, 1900kg of CuCl 2, 7kg of PdCl 2, 120kg of HAC, pH 1.2-1.5 (regulated by HCl). The above-mentioned liquid-phase catalytic medium is recycled in the process. Many pipe materials used in the device pure titanium, and washers, flanges, etc., but the choice of Ti-0.2Pd alloy, which