固体超强酸SO₄^2-/ZrO₂（SZ）可以在低温下催化异丁烯的叠合反应。采用沉淀浸渍法制备了SO₄^2-/ZrO₂（SZ）催化剂。考察了液固浸渍质量比和浸渍硫酸浓度对SZ催化异丁烯叠合的影响，并采用XRD、NH₃-TPD、TG手段表征了催化剂的晶相结构、酸量和酸强度。结果表明，浸渍液固质量比对SZ催化异丁烯叠合生成分子质量为250~500的聚异丁烯有显著影响，当液固质量比为1时，产物中五聚体及以上的选择性最大。降低硫酸浓度提高了强酸中心数量和单斜晶相比例，使生成异丁烯五聚体以上的性能大大改善。

Isobutene oligomerization can be catalyzed by solid superacid SO₄^2-/ZrO₂ (SZ) at low temperature.A series of SO₄^2-/ZrO₂ (SZ) catalyst samples are prepared through direct precipitation impregnation method.The effects of liquid/solid impregnation ratio and concentration of sulfuric acid on SZ's catalytic performance are studied.The crystalline structure,acid amount and acid strength of the catalysts are characterized by XRD,NH₃-TPD and TG.The results indicate that the liquid/solid impregnation ratio has a significant effect on the performance of SZ catalysts in catalyzing isobutene oligomerization.The resulting product has the highest pentamer selectivity when the liquid solid impregnation is 1.Strong acid center amount and monoclinic phase within the catalyst can be increased by lowing the concentration of sulfuric acid,which leads to great improvement of isobutene oligomerization performance of SZ catalysts.

牛嘉宇(1992-),男,硕士研究生,研究方向为超强酸催化剂的开发和应用,490222346@qq.com