| 摘要 |
A process for producing phenyl-alkanes, the process comprising the steps of: a) passing a feed stream comprising a first concentration of a first acyclic paraffin having a carbon range of C8-C28 and 2 or 3 primary carbon atoms and at least a second acyclic paraffin to an adsorption zone comprising a bed of an adsorbent comprising silicalite at adsorption promoting conditions to selectively adsorb at least a portion of the first acyclic paraffin contacting the bed of adsorbent with a desorbent stream comprising at least one component selected from the group consisting of a C5 -C8 cycloparaffin, a C5-C8 normal paraffin, and a C5- C8 branched paraffin and recovering from the adsorption zone an adsorption extract having a second concentration of the first acyclic paraffin that is greater than the first concentration; b) passing at least a portion of the adsorption extract to a dehydrogenation zone, operating the dehydrogenation zone at dehydrogenation conditions sufficient to dehydrogenate the first acyclic paraffin and recovering from the dehydrogenation zone a dehydrogenated product stream comprising an acyclic monoolefin having a carbon range of C8-C28 and 2 or 3 primary.carbon atoms; c) passing .a feedstock comprising a phenyl compound and passing at least a portion of the dehydrogenated product stream comprising the acyclic monoolefin to an alkylation zone, operating the alkylation zone at alkylation conditions sufficient to alkylate the phenyl compound with the acyclic monoolefin in the presence of an alkylation catalyst to form a phenyl-alkane comprising a molecule having one phenyl portion and one C8-C28 aliphatic alkyl portion; wherein the aliphatic alkyl portion has 2 or 3 primary carbon atoms and no quaternary carbon atoms that are not bonded by a carbon-carbon bond with a carbon atom of the phenyl portion; and wherein the alkylation has a selectivity to 2-phenyl-alkanes of from 40 to 100 and a selectivity to internal quaternary phenyl-alkanes of less than 10; and recovering the phenyl-alkane from the alkylation zone. |
