is 89 9 while the ratio of olefins to paraffins is substantially preserved the purified hydrocarbon feed stream containing olefins is particularly useful in the production of linear alkyl benzene the oxygenate removal process may include a final adsorption step to further reduce the oxygenate content to less than 0 015 the further reduced oxygenate level will depend on the requirements of the chosen alkylation system and may be as low as 0 0001 referring back to fig1 according to the invention the liquid hydrocarbon product 24 from the oxygenate removal process 16 is introduced into an alkylation reactor 40 the alkylation reaction may be carried out by using a friedel crafts type condensation catalyst such as alcl 3 h 2 so 4 bf 3 hf preferably a solid acid catalyst in the present case uop 39 s detal u2122 solid acid catalyst alkylation technology is used typically the alkylation reaction is carried at temperatures of greater than 100 u00b0 c and pressures of about 300 kpa abs in the presence of uop 39 s proprietary detal u2122 catalyst see smith r 1991 linear alkyl benzene by heterogeneous catalysis pep review no 90 2 4 sri international in this process benzene 42 and the olefin component of the liquid.