Affiliation:
1. Beijing Institute of Petrochemical Technology, Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, College of Chemical Engineering , Beijing 102617 , China
Abstract
Abstract
The side-chain alkylation of cumene and ethylene over a solid superbase catalyst K/KOH/γ-Al2O3 is investigated. The effects of the reaction temperature, pressure, and time on the conversion of cumene and selectivity of tert-amylbenzene (TAB) are discussed. The experimental results show that the conversion of cumene to tert-pentylbenzene increases with the increase in reaction temperature and ethylene pressure. The catalytic reaction has certain operational flexibility in terms of the reaction temperature, pressure, and time. In addition, the catalytic reaction can achieve directional conversion. The optimum operating conditions are obtained using a single factor test. The conversion of cumene is 99.8% and the selectivity toward TAB is 97.9% under catalyst concentration of 4 wt%, reaction temperature of 55°C, reaction pressure of 0.45 MPa, and reaction time of 30 min. The deactivation of catalyst is mainly caused by oxygen and water in the raw material.
Subject
Health, Toxicology and Mutagenesis,Industrial and Manufacturing Engineering,Fuel Technology,Renewable Energy, Sustainability and the Environment,General Chemical Engineering,Environmental Chemistry
Reference23 articles.
1. Tanabe K. Catalysis by acids and bases. Stud Surf Sci Catal. 1985;20:1–14. 10.1016/S0167-2991(09)60151-8.
2. Tanabe K, Misono M, Ono Y, Hattori H. Definition and classification of solid acids and bases. Stud Surf Sci Catal. 1989;51:1–3. 10.1016/S0167-2991(08)61043-5.
3. Suzukamo G, Fukao M, Minobe M. Preparation of new solid superbase and its catalytic activity. Chem Lett. 1987;16(4): 585–8. 10.1246/cl.1987.585.
4. Meyer U, Gorzawski H, Hölderich W. Michael addition of ethyl acrylate and acetone over solid bases. Catal Lett. 1999;59:201–6. 10.1023/a:1019020504961.
5. Borah P, Yamashita Y, Shu K. Solid superbase-catalyzed stereoselective 1,4-addition reactions of simple amides in batch and continuous-flow systems. Adv Synth Catal. 2019;361(16):5143–69. 10.1002/adsc.201900364.