METHOD FOR OBTAINING ETHYL ACETATE Russian patent published in 2018 - IPC C07C69/14 C07C67/40 C07C67/44 B01J21/04 B01J21/06 B01J23/06 B01J23/72 

FIELD: chemistry.

SUBSTANCE: invention relates to the chemical technology of organic substances, to processes for producing ethyl acetate, involving a vapor-phase heterogeneous catalytic conversion of ethanol in the presence of a copper-containing catalyst at elevated temperature and pressure in the first reactor to form the desired product and reaction by-products, hydrogenating the by-carbonyl-containing reaction products in the presence of a catalyst while lowering the temperature in the second reactor to form the corresponding alcohols, and then separating the desired product, where the process is carried out at a temperature of 240–270 °C in the first reactor and lowering the temperature to 140–160 °C in the second reactor at the same pressure of 0.4–0.6 MPa, and as a catalyst, a mixture of CuO-ZnO-ZrO₂-Al₂O₃ oxides is used with the following ratio of components, mass%: CuO: 45–50, 55; Al₂O₃: 18–20; ZnO: 7–10; ZrO₂: 20–25. This direct synthesis of ethyl acetate provides a simplification of the process using a single catalyst in both stages of the continuous-flow process cycle while maintaining the same gas atmosphere pressure in the two reactors.

EFFECT: experimentally selected optimal composition of a single selective Cu/ZnO-ZrO₂-Al₂O₃ catalyst allows to increase the content of ethyl acetate in reaction products to 39 % by weight at 58 % ethanol content.

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