| 摘要 |
<p>1360555 Alkylation of hydrocarbons TEXACO DEVELOPMENT CORP 21 July 1972 [5 Aug 1971] 34126/72 Heading C5E An iso-paraffin is alkylated with an olefin hydrocarbon in the presence of sulphuric acid to produce alkylated hydrocarbons in a plurality of reactors 11, 19, 25 each having an associated acid settler 9, 21, 27, wherein a hydrocarbon phase containing alkyl sulphate from each stage is withdrawn at 14, 22 and 28 and a combined hydrocarbon phase 15 is obtained by combining all of the phases or all of the phases except the first, spent acid is withdrawn from the last stage at 29, a portion of the sulphuric acid from each settler is recycled to its associated reactor via 10, 23, 24, in each of the stages except the last, another portion of the acid is transferred via 16 and 23 to the next subsequent stage, the combined hydrocarbon phases 15 are contacted in mixer 23 with a sulphuric acid containing stream 32 preferably from 1st stage settler 9 as 30, fresh sulphuric acid is introduced into the first stage or into the stream 30 from that stage and the sulphuric acid stream from the mixer 33 is recycled to one of the stages (e.g. via 37). In an alternative embodiment the sulphuric acid containing stream 32 is a slip stream containing a portion of the hydrocarbon/sulphuric acid emulsion formed in the first stage reactor 11. The iso-paraffin is iso-butane, iso-pentane, iso-hexane or mixtures thereof. The olefin is a propene, butene, pentene or a hexene isomer or mixtures thereof.</p> |
