Separation of Phenolic Compounds from the Product of Biomass by Deoxy-liquefaction

The bio-petroleum obtained from cotton stalk by deoxy-liquefaction which is rich in phenol derivatives was rectified and the fraction of 180-260 ℃ was collected,in which the GC content of phenolic compounds was as high as 78.84 %,the yield was about 45 %.After the fraction was bathed with NaOH solution,the oil phase and water phase were separated.The phenolic compounds in water phase were separated by adsorption with the organobentonite and extraction with the organic solvent,and analyzed by GC and GC-MS.The results showed that high purity of phenolic compounds were obtained by organic solvent extraction method and the relative content in organic solvent and the purity after separation were up to 93.89 % and 93.63 %,respectively.