研究了含铑配合物的催化剂在各种酸性离子液体(ILs)中甲醇和二甲醚的羰基化。结果表明,IL中H 2 PO - 4阴离子的存在导致甲醇和二甲醚羰基化为乙酸甲酯和乙酸的速率显着增加。选择了离子液体和条件,在这些条件下,可以实现92%的转化率和80%的乙酸甲酯选择性。建议的催化体系可以重复使用而不会损失活性。
研究了含铑配合物的催化剂在各种酸性离子液体(ILs)中甲醇和二甲醚的羰基化。结果表明,IL中H 2 PO - 4阴离子的存在导致甲醇和二甲醚羰基化为乙酸甲酯和乙酸的速率显着增加。选择了离子液体和条件,在这些条件下,可以实现92%的转化率和80%的乙酸甲酯选择性。建议的催化体系可以重复使用而不会损失活性。
An ionic liquid which is substantially free of Lewis acidity wherein said ionic liquid is obtainable by reacting (a) an organo-nitrogen compound or an organo-phosphorus compound which is substantially free of Lewis acidity with (b) a Brønsted acid, in a mole ratio of (a) to (b) of less than or equal to 1 with the proviso that where the Brønsted acid gives up a single proton the mole ratio of (a) to (b) is less than 1. The ionic liquids are useful as acid catalysts or as solvents for acid catalysts, for example, in esterification reactions or in the alkylation of aromatics.