A Study of the Technical Route of the Synthesis of Alkylbenzenes for Use as an Oil Displacement Agent.

This paper describes the technology of synthesizing alkylbenzenes containing C_16–19 alkyl chains. The heavy alkylbenzenes were prepared by C_16–19 liquid paraffin dehydrogenation, followed by alkylation with benzene. A novel catalyst containing Pt and Sn as its main components for the dehydrogenation of C_16–19 paraffins to alkenes was prepared by vacuum impregnation and the catalyst exhibited high stability and selectivity. The alkylation of the C_16–19 alkenes and benzene had a conversion yield of 86.15% and a selectivity of 81.21%. The main alkylbenzenes was identified as monoalkylbenzene by IR and chromatography analysis. C_16–19 alkylbenzene sulfonates are found to give an ultra-low interfacial tension when mixing with crude oil/reservoir water. [ABSTRACT FROM AUTHOR]