文中提出了通过采用改性的A-、X-、Y-型复合分子筛来获得高纯度丁烯-1的方法,即从C_4馏份中,特别是从正丁烯异构体的混合物中分离出高纯度丁烯-1的方法。装入的A-型分子筛是用Mg~(2+)离子和(或)同Zn~(2+)离子交换8—25％的可交换的Na~+离子,装入的X—或Y—型分子筛的可交换的Na~+离子则用0—50%的Ba~(2+)离子和(或)10—15％的Li±、Rb±、Tl±、或 A method for obtaining high purity butene-1 by using modified A-, X- and Y-type composite molecular sieves is proposed in the paper, namely, the separation from the C 4 fraction, especially from the mixture of n-butene isomers High purity butene-1 method. The packed A-type molecular sieve is prepared by exchanging 8-25% of exchangeable Na ~ + ions with Mg 2+ ions and / or Zn 2+ ions, X- or Y- Type zeolite exchangeable Na ~ + ions with 0-50% of Ba ~ (2+) ions and (or) 10-15% of Li ±, Rb ±, Tl ±, or