Method for cogeneration ethanol and methanol employing synthesis gas and ethyl acetate reaction

The invention relates to a method for cogeneration ethanol and methanol employing synthesis gas and ethyl acetate reaction. The method comprises the following steps: 1) carrying out hydroxylation reaction on methanol and carbon monoxide in a high-pressure reaction kettle to obtain an acetic acid; 2) carrying out esterification reaction on the acetic acid and ethanol in an esterification reaction tower, so as to obtain acetic ether; 3) generating ethanol from the acetic ether by catalytic hydrogenation; enabling the carbon monoxide and the carbon dioxide in the synthesis gas to react with hydrogen to generate methanol in the same reactor; 4) separating the generated methanol and ethanol to obtain a methanol product and an ethanol product respectively; 5) taking a part of separated methanol as a final product and the other part as a raw material to carry out hydroxylation reaction together with the carbon monoxide to prepare acetic acid in a cycle; 6) taking one part of the separated ethanol as the final produc