Copper catalyst and preparation method thereof

The present invention relates to a catalytic composition and a process for the production of 1, 4-butynediol by the catalytic ethynylation of formaldehyde. In one embodiment, the present invention provides a catalytic composition comprising from 20 to 80 wt% Cu, calculated as CuO; bi in an amount of 0.5 to 15% by weight, calculated as Bi2O3; ca in an amount of 6.6 to 40% by weight, calculated as CaO; and Si in an amount of 0 to 30% by weight, calculated as SiO2. 本发明涉及一种催化组合物和一种通过甲醛的催化乙炔化生产1,4-丁炔二醇的方法。在一个实施方案中，本发明提供一种催化组合物，包含以CuO计算为20-80重量％的Cu；以Bi2O3计算为0.5-15重量％的Bi；以CaO计算为6.6-40重量％的Ca；和以SiO2计算为0-30重量％的Si。