NOVELTY - Manufacture of methanol and dimethyl ether involves carrying out crude purification, temperature swing adsorption (TSA) purification, pressure swing adsorption (PSA) purification, fine purification, mix and compression, methanol synthesis and methanol generating dimethyl ether, methanol synthesis purge gas hydrogen purification and waste gas treatment. The methanol synthesis and methanol generating dimethyl ether step is carried out using gas for generating crude methanol which is dehydrated to produce dimethyl ether or purifying the methyl alcohol product.    USE - Manufacture of methanol and dimethyl ether.    DETAILED DESCRIPTION - Manufacture of methanol and dimethyl ether involves carrying out crude purification, temperature swing adsorption (TSA) purification, pressure swing adsorption (PSA) purification, fine purification, mix and compression, methanol synthesis and methanol generating dimethyl ether, methanol synthesis purge gas hydrogen purification and waste gas treatment. The temperature swing adsorption (TSA) purification is performed by selectively adsorbing sulfur, phosphorus, arsenic, fluorine and cyanide, nitrogen-oxides impurities of calcium carbide furnace tail gas by adsorbent, and transporting hydrogen, oxygen, nitrogen, methane, carbon monoxide and carbon dioxide to pressure swing adsorption (PSA) as pre-purified gas from the top of adsorber through bed. The pressure swing adsorption (PSA) is performed by transporting weak adsorption component containing hydrogen, oxygen, nitrogen, methane, carbon monoxide and carbon dioxide of smaller adsorption capacity in the calcium carbide furnace exhaust through the adsorbent bed, and adsorbing strong adsorption component containing sulfur, phosphorus, arsenic, fluorine of bigger adsorption capacity in the calcium carbide furnace exhaust to stay in the bed. The fine purification is performed by purifying calcium carbide furnace exhaust using deoxidizing and desulfurization agent. The purified gas contains sulfur content of less than 0.1 ppm, and oxygen content less than 0.1%. The mix and compression process is performed by mixing and compressing calcium carbide furnace exhaust, sodium chlorate tail gas from outside conducted with purification and compression and/or other hydrogen gas source. The methanol synthesis and methanol generating dimethyl ether step is carried out using gas for generating crude methanol which is dehydrated to produce dimethyl ether or purifying the methyl alcohol product.