多元助催化甲醇羰化制甲酸甲酯

以单一甲醇钠作为催化剂通过甲醇羰基合成甲酸甲酯,存在催化剂活性不高、易失活、寿命短等问题。可用添加促进剂的方法来解决上述问题。考察了三种不同促进剂A、B、C及其二元和三元复合系统对反应的影响,发现多促进剂系统能明显提高催化剂活性和催化活性期。最好的单一促进剂A,系统反应150min获得最大甲醇最大转化率46 3%;最好的二元促进剂系统AB,甲醇最高转化率为73%,催化剂活性期是使用单一促进剂A的2 2倍;ABC三元促进剂系统,甲醇最高转化率达74 6%,催化剂活性期是使用单一促进剂A的2 5倍。

Synthesis of Methyl Formate by Carbonylation of Methanol under Multi-Promoter Systems

Synthesis of methyl formate (MF) by carbonylation of methanol with only sodium methoxide as catalyst exists some shortages, such as low activity, rapid loss of activity and short catalyst life. Promoters were used to solve these problems. Three kinds of promoters, A, B and C as well as their binary- or three-composite systems were examined for title synthesis reaction. It was found that multi-promoter systems could obviously increase activity and prolong catalyst active period. A was the best single promoter with a highest methanol conversion of 46.5% during 150 min reaction; the best binary system AB had a highest methanol conversion of 73% and its active period was 2.2 times of single promoter A's; three-composite system ABC had the highest methanol conversion of 74.6% and its active period was 2.5 times of single promoter A's.