Ni/γ-Al2O3催化苯乙烯-异戊二烯-苯乙烯嵌段共聚物加氢
Hydrogenation of styrene-isoprene-styrene block copolymer catalyzed by Ni/γ-Al2O3
周浩浩 1郭方 1荣泽明 1侯召民 1苏东宁2
作者信息
- 1. 大连理工大学 精细化工国家重点实验室,辽宁 大连 116024
- 2. 大连理工大学 精细化工国家重点实验室,辽宁 大连 116024;大连长兴催化科技有限公司,辽宁大连 116024
- 折叠
摘要
以γ-Al2O3 为原料、碳酸铵为沉淀剂,采用沉积-沉淀法制备了Ni/γ-Al2O3 催化剂,将其应用于苯乙烯-异戊二烯-苯乙烯(SIS)嵌段共聚物催化加氢.通过XRD、TEM、XPS、1HNMR和DSC对催化剂和产物进行了表征.考察了载体种类、Ni理论负载量(以载体质量为基准,下同)、反应条件对SIS加氢反应的影响.结果表明,以γ-Al2O3为载体并负载 10%的Ni为催化剂、环己烷为溶剂、反应温度为 140℃、反应压力为 1 MPa、反应时间3.0 h的条件下,催化剂具有最优活性,聚异戊二烯嵌段加氢度达到85%,副反应苯环的加氢度<10%.
Abstract
Ni/γ-Al2O3 catalysts were prepared from deposition-precipitation of γ-Al2O3 and ammonium carbonate,then used in the catalytic hydrogenation of styrene-isoprene-styrene(SIS)block copolymers.Both the catalysts and products obtained were characterized by XRD,TEM,XPS,1HNMR and DSC.The effects of support type,theoretical loading amount of Ni(based on the mass of support,the same below)and reaction conditions on the hydrogenation of SIS were investigated.The results showed that Ni/γ-Al2O3 with 10%theoretical loading amount of Ni exhibited the best activity and selectivity,and the hydrogenation degree of polyisoprene reached 85%and that of benzene ring in the side reaction was less than 10%under the conditions of cyclohexane as solvent,reaction temperature 140℃,reaction pressure 1 MPa and reaction time 3.0 h.
关键词
苯乙烯-异戊二烯-苯乙烯嵌段共聚物/Ni/γ-Al2O3/非均相催化/催化技术Key words
styrene-isoprene-styrene/Ni/γ-Al2O3/heterogeneous catalysis/catalytic technology引用本文复制引用
基金项目
国家重点研发计划专项(2019YFC1803804-03)
中央高校基本科研业务费专项(DUT2022TB10)
辽宁省自然科学基金(2020-MS-17)
出版年
2024
NETL
NSTL
万方数据