TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The solid-type catalyst contains copper, and zinc and/or aluminum. The solid-type solid acid catalyst is titanium oxide (TiO2)-silica (SiO2), TiO2-alumina (Al2O3), TiO2-zirconium oxide (ZrO2), ZrO2-Al2O3, TiO2-phosphorus pentoxide (P2O5), TiO2-boron oxide (B2O3), (gamma)-Al2O3, (beta)-Al2O3, (delta)-Al2O3, (theta)-Al2O3 or aluminumoxy hydroxide (AlO(OH)), preferably TiO2-SiO2, TiO2-Al2O3, TiO2-ZrO2, ZrO2-Al2O3, TiO2-P2O5 or TiO2-B2O3. The solid-type solid acid catalyst is M-Y type zeolite, M-X type zeolite, M-A type zeolite, M-(beta) type zeolite, M-L type zeolite, M-mordenite, M-ferrierite or M-metallosilicate.M=sodium, potassium or ammonium (NH4).Preferred Properties: The solid-type solid acid catalyst has solid-acid strength (H0) of greater than -10, solid-acid amount of 0.15 mmol/g or more, and specific surface area of more than 20 m2/g. The particle size of granular solid-type solid acid catalyst and solid-type catalyst are 500 microns or less.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The dimethyl-ether modification catalyst comprises copper-aluminum oxide (CuAl2O4) crystal having spinel structure. The dimethyl-ether modification catalyst carries out dispersion coordination of solid-type catalyst containing copper, and solid-type solid acid catalyst containing 2 or more types of solid acids.Preferred Process: The dimethyl-ether modification catalyst is formed by mixing cylindrical, ball or grain shaped solid-type solid acid catalyst having diameter and height of 10 mm(phi) or less, or solid-type solid acid catalyst molded in the shape of ring, and cylindrical, ball or grain shaped solid-type catalyst having diameter and height of 10 mm(phi) or less, or solid-type catalyst molded in the shape of ring. The solid-type solid acid catalyst and solid-type catalyst are mixed such that weight proportion of solid-type solid acid catalyst is lower than solid-type catalyst, and filled in the apparatus from initial to final stage of gas flow. Air or oxygen (O2) is further supplied to the apparatus, such that the molar ratio of oxygen and dimethyl ether is 1.5-10.Preferred Composition: The amount of solid-type solid acid catalyst contained in the dimethyl-ether modification catalyst apparatus is 10-90 wt.% with respect to total amount of the catalyst.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solid-type catalyst contains copper, and zinc and/or aluminum. The solid-type solid acid catalyst is titanium oxide (TiO2)-silica (SiO2), TiO2-alumina (Al2O3), TiO2-zirconium oxide (ZrO2), ZrO2-Al2O3, TiO2-phosphorus pentoxide (P2O5), TiO2-boron oxide (B2O3), (gamma)-Al2O3, (beta)-Al2O3, (delta)-Al2O3, (theta)-Al2O3 or aluminumoxy hydroxide (AlO(OH)), preferably TiO2-SiO2, TiO2-Al2O3, TiO2-ZrO2, ZrO2-Al2O3, TiO2-P2O5 or TiO2-B2O3. The solid-type solid acid catalyst is M-Y type zeolite, M-X type zeolite, M-A type zeolite, M-(beta) type zeolite, M-L type zeolite, M-mordenite, M-ferrierite or M-metallosilicate.M=sodium, potassium or ammonium (NH4).Preferred Properties: The solid-type solid acid catalyst has solid-acid strength (H0) of greater than -10, solid-acid amount of 0.15 mmol/g or more, and specific surface area of more than 20 m2/g. The particle size of granular solid-type solid acid catalyst and solid-type catalyst are 500 microns or less. EXAMPLE - 2.5 mol% of sodium carbonate was dissolved in water (2 L), and maintained at 60degreesC, to obtain solution (A). Aluminum nitrate (in mol) (0.015) and zinc nitrate (0.225) were dissolved in water (400 ml), and maintained at 60degreesC, to obtain solution (B). Calcium nitrate (0.006) and magnesium nitrate (0.012) were dissolved in water (300 ml), and maintained at 60degreesC, to obtain solution (C). Copper nitrate (0.3) was dissolved in water (400 ml), and maintained at 60degreesC, to obtain solution (D). Solution (B) was dripped into solution (A), and stirred for 30 minutes to obtain precipitate generation liquid (E). Solution (C) was dripped into liquid (E), and stirred for 30 minutes to obtain precipitate generation liquid (F). Solution (D) was then dripped into liquid (F), and stirred for 30 minutes to obtain precipitate generation liquid (G) containing calcium, magnesium, aluminum, zinc and copper. Liquid (G) was cured, filtered, washed, dried at 100degreesC for 24 hours, and baked at 300degreesC for 3 hours to obtain solid-type catalyst powder. Solid-type solid acid catalyst powder containing (gamma)-alumina of 0.3 mmol/g and having acid strength of -8 and Brunauer Emmett Teller (BET) specific surface area of 200 m2/g, and the obtained solid-type catalyst powder were mixed at a weight ratio of 1:1, and molded in cylindrical shape to obtain dimethyl-ether modification catalyst. The dimethyl-ether modification catalyst had favorable modification efficiency and durability.