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Directional synthesis of cumene from lignin by catalytic transformation
Li Quan-Xin
Author NameAffiliationE-mail
Li Quan-Xin University of Science and Techonology of China liqx@ustc.edu.cn 
Abstract:
Cumene is an important intermediate and chemical in chemical industry. In this work, directional preparation of cumene using lignin was achieved by a three-step cascade process. The mixture aromatics were first produced by the catalytic pyrolysis of lignin at 450 oC over 1%Zn/HZSM-5 catalyst, producing 85.7 wt% monocyclic aromatics. Then, the catalytic dealkylation of heavier aromatics resulted in benzene-rich aromatics with 93.6 wt% benzene at 600 oC over H? catalyst. Finally, the cumene synthesis was performed by the aromatic alkylation, giving cumene selectivity of 91.6 C-mol% using the [bmim]Cl–2AlCl3 ionic liquid at room temperature for 15 min. Besides, adding a small amount of methanol to the feed can efficiently suppress the coke yield and enhance the aromatics yield. The proposed transformation potentially provides a useful route for production of cumene using renewable lignin.
Key words:  木质素  异丙苯  催化热裂解  去烷基化  烷基化
FundProject:
Directional synthesis of cumene from lignin by catalytic transformation
李全新
摘要:
异丙苯是一种重要的化学品和化工中间物,本工作通过三步串级反应成功的将木质素定向合成异丙苯。首先在450 oC用1%Zn/HZSM-5催化剂将木质素催化热裂解生成混合芳烃,单环芳烃的选择性达到85.7 wt%;然后重质芳烃在600 oC用H?催化剂催化脱烷基得到富苯芳香物,苯的选择性达到93.6 wt%。最后用[bmim]Cl-2AlCl3离子液体催化剂在室温条件下烷基化15分钟得到目标产物异丙苯,选择性高达91.6 C-mol%。此外,添加少量的甲醇到进料里面可以有效抑制积碳生成,增加芳香产率。本工作以可再生木质素为原料给异丙苯的生产提供了新思路。
关键词:  木质素  异丙苯  催化热裂解  去烷基化  烷基化
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