By using 4-vinyl pyridine (VP) and p-xylylene dichloride (PXDC)

a PVP-PXDC

a highly crosslinked polymerized ionic liquid

was synthesized through radical polymerization and quaternary crosslinking reaction. In terms of composition

structure

morphology

thermal stability

specific surface area and pore structure of the ionic liquid polymer

it has been characterized by techniques of gel permeation chromatography

elemental analysis

infrared spectroscopy

scanning electron microscopy

thermo gravimetric analyzer and N2-adsorption

respectively

followed by the performance evaluation as adsorbent for desulfurization. It showed that the mesoporous ionic liquid polymer features 17.8 nm of average pore size

56.9 m2·g-1 of specific area of and above 250℃ of decomposition temperature. The ionic liquid polymer was achieved by synthesis of the linear PVP polymer (160000 of weight-based mean molecular weight) followed by crosslinking with PXDC at molar ratio of VP/PXDC of 2:1 in DMF solvent. Its adsorption capacities for 1000 mg·kg-1 DBT

BT and T in a representative oil

are 5.65

5.48 and 4.53 mg S·g-1 at 303 K and mass ratio of oil/adsorbent of 50:1

respectively

which are much higher than those of conventional pyridinium based ionic liquids. Moreover

the adsorption isotherms follow Freundlich equation.