CuCl/肟配合物催化甲醇液相一步氧化生成二甲氧基甲烷

摘要

Several CuCl/oxime complexes were studied to use as the catalyst for one-step liquid-phase synthesis of dimethoxymethane(DMM) by oxidation of methanol, and it was found that CuCl/1,2-cyclohexanedione dioxime was the best. Effects of the composition and concentration of the catalyst, reaction temperature, oxygen pressure on the reaction were investigated. The results showed that methanol conversion could be over 21% with a DMM selectivity of above 99% under the optimum conditions: the molar ratio of CuCl to 1,2-cyclohexanedione dioxime of 4 to 8, the catalyst concentration of 11.8g/L to 23.6g/L, the reaction temperature of 403K to 423K and the oxygen pressure of 2.0MPa.%研究了以CuCl与多种肟的配合物作为催化剂一步液相氧化甲醇合成二甲氧基甲烷（DMM），发现CuCl/1,2-环己二酮二肟效果最佳。考查了催化剂组成及其质量浓度、反应温度、氧气压力对反应的影响。结果表明，在CuCl与1,2-环己二酮二肟的物质的量比为4~8、催化剂质量浓度为11.8g/L~23.6g/L、反应温度403K~423K和氧气压力2.0MPa这一优化条件下，甲醇转化率达到21%以上，DMM选择性达到99%以上。