| 摘要 |
PURPOSE:To industrially advantageously obtain a carbonic acid diester by subjecting CO to vapor phase reaction with a nitrite under mild conditions using a solid catalyst obtained by adding an alkali (earth) metal salt of phosphoric acid to a compound of platinum group metal, compound of iron, copper, etc., and compound of V, W, etc. CONSTITUTION:Carbon monoxide is subjected to vapor phase reaction with a nitrite (particularly, methyl nitrite or ethyl nitrite) using a solid catalyst obtained by supporting a platinum group metal or compound thereof as the primary catalyst component, compound (e.g. copper (III) chloride) of a metal selected from iron, copper, Bi, Co, Ni and tin as the secondary catalyst compound, a compound (e.g. vanadium oxide) of metal selected from V, Mo and W as the tertiary catalyst component and alkali metal salt or alkaline earth metal salt (e.g. lithium phosphate of phosphoric acid as the forth component on the support to provide carbonic acid diester (e.g. dimethyl carbonate). The above-mentioned reaction can stably be carried out under mild conditions in high selectivity and yield without accompanying danger in the operation by subjecting the above-mentioned component to vapor phase reaction under low temperature and pressure using the above-mentioned catalyst. Separation of catalyst is made unnecessary and metal thereof is not eluted, because the reaction is carried out in vapor phase. |
