| 摘要 |
A process for selective formation of ethanol from acetic acid by hydrogenating acetic acid in the presence of a catalyst comprising a modified support having cobalt and an alkaline earth support modifier. The active metals may include a first metal of palladium, platinum, and combinations thereof and a second metal of copper, iron, nickel, zinc, silver, chromium, tin, and combinations thereof. |
| 主权项 |
1. A catalyst for hydrogenating acetic acid and esters thereof, comprising:
a) active metals comprising: 1) a first metal selected from the group consisting of palladium, platinum, and combinations thereof, and 2) a second metal selected from the group consisting of copper, iron, nickel, zinc, silver, chromium, tin, and combinations thereof; and b) a modified support, wherein the active metals are disposed on the modified supports, wherein the modified support further comprises: 1) a support material selected from the group consisting of silica, silica/alumina, pyrogenic silica, high purity silica, carbon, and mixtures thereof, and 2) support modifiers comprising: i) from 0.2 wt. % to 10 wt. % of a first modifier selected from the group consisting of oxides of cobalt, and ii) from 0.2 wt. % to 25 wt. % of a second modifier selected from the group consisting of alkaline earth metal oxides or metasilicates of the alkaline earth metals, wherein the first metal is present in an amount of less than 1 wt. % and the total content of the first and second metals is in an amount from 0.1 wt. % to 10 wt. %, based on the total weight of the catalyst. |
