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Environmentally benign catalytic synthesis and hydro‐refining of linear alkylbenzenes
Author(s) -
Ren Jie,
Qin Fei,
Deng You,
Shen Lian
Publication year - 2019
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.23524
Subject(s) - alkylbenzenes , alkylation , catalysis , space velocity , olefin fiber , linear alkylbenzene , refining (metallurgy) , chemistry , dicyclopentadiene , benzene , organic chemistry , hydrocarbon , selectivity , chemical engineering , polymerization , engineering , pulmonary surfactant , biochemistry , polymer
The synthesis technology of linear alkylbenzenes (LABs) was studied through the preparation of an Al‐SBA‐15 catalyst, the optimization of alkylation conditions, and the regeneration of deactivated catalyst. The hydro‐refining over the Pd/Al 2 O 3 catalyst was carried out to remove unsaturated hydrocarbon impurities from the LAB. The results of the alkylation reactions over the Al‐SBA‐15 catalyst in a liquid fixed bed reactor showed that the olefin conversion remained above 98 % for time on stream of 3000 h, and the LAB selectivity was above 93 % under the following conditions: temperature of 260 °C; pressure of 5.0 MPa; weight hourly space velocity ( WHSV) of 1.0 h −1 ; and the molar ratio of benzene to olefin of 25:1. Through the burning coke regeneration, the catalytic performance of the deactivated alkylation catalyst was satisfactorily restored. The quality of the LAB synthesized through alkylation and hydro‐refining was better than that of the industrial LAB produced using the hydrofluoric acid catalytic process.