| abstract |
(57) [Abstract] [Purpose] 1,4-Suppressed by-products and improved selectivity A method for producing butanediol is provided. By the catalytic hydrogenation of diethyl maleate and / or diethyl succinate in the gas phase in the presence of a catalyst containing copper, chromium, manganese and / or barium, and sodium and / or potassium, 1, A method for producing 4-butanediol. [Effect] By-products are suppressed and the selectivity is improved to 1,4 -Butanediol can be produced and the catalyst life can be improved. |