Iso-butene (iso-C₄H₈) is an important raw material in chemical industry, whereas its efficient separation remains challenging due to similar molecular properties of C₄ olefins. The ideal adsorbent should possess simultaneous high uptakes for 1,3-butadiene (C₄H₆) and n-butene (n-C₄H₈) counterparts, endowing high efficiency for iso-C₄H₈ separation in adsorption columns. Herein, a sulfate-pillared adsorbent, SOFOUR-DPDS-Ni (DPDS = 4,4′-dipyridyldisulfide), is reported for the efficient iso-C₄H₈ separation from binary and ternary C₄ olefin mixtures. The rigidity in pore sizes and shapes of SOFOUR-DPDS-Ni exerts the molecular sieving of iso-C₄H₈, while exhibiting high C₄H₆ and n-C₄H₈ uptakes. The benchmark Henry’s selectivity for C₄H₆/iso-C₄H₈ (2321.8) and n-C₄H₈/iso-C₄H₈ (233.5) outperforms most reported adsorbents. Computational simulations reveal the strong interactions for C₄H₆ and n-C₄H₈. Furthermore, dynamic breakthrough experiments demonstrate the direct production of high-purity iso-C₄H₈ (>99.9%) from C₄H₆/iso-C₄H₈ (50/50, v/v), n-C₄H₈/iso-C₄H₈ (50/50, v/v), and C₄H₆/n-C₄H₈/iso-C₄H₈ (50/15/35, v/v/v) gas-mixtures.

异丁烯(iso-C ₄ H ₈ )是重要的化工原料，但由于与C ₄烯烃相似的分子性质，其有效分离仍然具有挑战性。理想的吸附剂应同时具有对 1,3-丁二烯 (C ₄ H ₆ ) 和正丁烯 (nC ₄ H ₈ ) 对应物的高吸附量，从而赋予吸附塔中异 C ₄ H ₈分离的高效率。本文报道了一种硫酸盐柱柱吸附剂 SOFOUR-DPDS-Ni (DPDS = 4,4'-二吡啶二硫化物)，用于从二元和三元 C ₄烯烃混合物中有效分离 iso-C ₄ H ₈ 。 SOFOUR-DPDS-Ni 的孔径和形状的刚性发挥了iso-C ₄ H ₈的分子筛分作用，同时表现出高C ₄ H ₆和nC ₄ H ₈吸收。基准 Henry 对 C ₄ H ₆ /iso-C ₄ H ₈ (2321.8) 和 nC ₄ H ₈ /iso-C ₄ H ₈ (233.5) 的选择性优于大多数报道的吸附剂。计算模拟揭示了C ₄ H ₆和nC ₄ H ₈的强相互作用。此外，动态突破性实验证明可以直接生产高纯度 iso-C ₄ H ₈ (>99.9%) 来自 C ₄ H ₆ /iso-C ₄ H ₈ (50/50, v / v )、nC ₄ H ₈ /iso-C ₄ H ₈ (50/50, v / v ) 和 C ₄ H ₆ /nC ₄ H ₈ /iso-C ₄ H ₈ (50/15/35, v / v / v ) 气体混合物。