| 摘要 |
PURPOSE:To prepare a glycol dialkyl ether at a low cost, by the catalytic hydrogenation decomposition of a glycol monoalkyl ether acetal compound in the presence of an Ni-group composite catalyst composed of easily available Ni, Mo and/ or Re. CONSTITUTION:In the catalytic hydrogenation decomposition of an acetal compound of formula I (R is alkyl; R<1> and R<2> are H or alkyl; n is 1-8), e.g. ethylene glycol monomethyl ether formal, to obtain a glycol dialkyl ether compound of formula II, e.g. ethylene glycol dimethyl ether, the reaction is carried out in the presence of a catalyst comprising an Ni-group composite catalyst composed of Ni and Mo and/or Re. The catalyst introduces its constituent elements through its decomposable compound, especially thermally decomposable compound. USE:Solvent, extracting agent, absorbent, gas-cleaning agent, etc. |
