Patent ID: 8450234

Claim:
A mixed catalyst used for producing dimethylether comprising: a methanol synthesis catalyst produced from a sodium carbonate solution and a metal nitrate solution formed by adding a promoter including at least one selected from Mg, Zr, Ga, Ca, or the oxide thereof to a main catalyst comprised of a copper nitrate solution, a zinc nitrate solution, and an aluminum nitrate solution; and a dehydration catalyst formed by mixing aluminum phosphate (AlPO 4 ) with gamma alumina, wherein a ratio of the main catalyst to the promoter in the methanol synthesis catalyst is in a range of 19 to 99, wherein a ratio of aluminum phosphate to gamma alumina in the dehydration catalyst is in a range of 1:0.82 to 1:1.22, and wherein a mixing ratio of the methanol synthesis catalyst to the dehydration catalyst is in a range of 1:0.4 to 1:0.65.