Abstract: Preparation of ethylene glycol acetate from ethylene using the catalytic system, PdCl2-CuCl2-Cu(OAc)2 in HAc solution, usually involves two steps -acetoxylation and regeneration of catalyst. In this paper, a one-step process has been studied, with oxygen and ethylene introduced simultaneously into a single reactor. It was observed that there must be sufficient partial pressure of oxygen to oxidize Cu+ to Cu++, by keeping oxygen concentration at 8-10% in the raw binary gas mixture of oxygen and ethylene, whereby the activity of the catalytic system could be maintained without formation of CuCl2 residue. By using nitrogen as a diluent, the ratio of O2/C2H4 could be kept in the non-explosive range, and it was found further that 95% of the ethylene in the raw gas could be converted into ethylene glycol monoacetate and diacetate.

摘要： 用PdCl_2-CuCl_2-Cu(OAc)_2醋酸溶液的催化体系由乙烯制备乙二醇醋酸酯,催化过程分乙酰氧基化及催化剂再生二步.本文作了进一步的研究.即将氧和乙烯同时送入反应器,使乙酰氧基化反应和催化剂再生过程为一步过程.研究证明:当采用氧及乙烯作原料气时,在双组份中氧含量8—10%时,才有足够的氧分压,能使Cu~+氧化成Cu~(?),从而保持催化系统的活性,因而基本上在催化体系中无CuCl的残渣生成.并研究了以N_2作为添加组成,可以使O_2/C_2H_4处于非爆炸范围,所得结果,原料气转化的乙烯中有95%生成乙二醇单醋酸酯和乙二醇双醋酸酯.