| 摘要 |
<p>Alkylation of benzene with olefin yielding mono alkylate for detergent production is effected by: (a) reacting benzene with an olefinic hydrocarbon in a first reactor at 4-49 degrees C in presence of a mineral acid catalyst, (b) separating from stage (a) effluent a first catalyst phase and a first hydrocarbon phase, (c) returning some or all of the first catalyst phase to stage (a), (d) feeding first hydrocarbon phase to a second reactor kept 3.6 degrees C higher than first reactor and further reacting using fresh acid catalyst, (e) separating from stage (d) effluent a second catalyst phase and a second hydrocarbon phase comprising alkylated benzene, and (f) returning some or all of second catalyst phase to stage (a). The feedstock is pref. a linear C10-15 mono-olefin, and catalysts include H2SO4 and HF. In the first reactor, the temp. is from 4 degrees to 49 degrees C, typically 38 degrees C., the residence time is from 5 to 25 mins, typically 15 mins, catalyst: hydrocarbon vol. ratio is from 0.2:1 to 10:1., and benzene: olefin mol. ratio is 1:1 pref. from 2:1 to 15:1. In the second reactor, the temp. is from 27 degrees to 66 degrees C, and residence time and catalyst:hydrocarbon ratio as above.</p> |
