| 摘要 |
A process for producing dimethyl ether (DME) from CO and H2, and possibly also CO2, is disclosed in which the gaseous reactants are reacted in the presence of a catalytic composition constituted overall by a mixture of: (a) crystalline silica in which some silicon atoms in the crystal lattice have been replaced by aluminium, and which corresponds to the general formula: Si1Al (0.0012 &cirf& 0.0052)Oy where y varies between 2.0018 and 2.0075; and (b) a mixture of Cu/Zn/Cr and/or Cu/Zn/Al oxides and/or salts; the Al can also be present together with the Cr. Good yields of DME can be achieved at temperatures lower than those normally associated with the dehydration of methyl alcohol to produce DME. |
