Ethylene cracking C5 fraction atmospheric pressure rectification intercepts 45-75℃ isoprene enriched component as raw material A; ethylene cracking C5 fraction atmospheric pressure rectification intercepts 25-45℃ isoprene enriched component as raw material B ; Ethylene cracking C9 fraction is vacuum rectified under 0.08～0.095MPa,Petroleum Resin and the fraction with boiling point of 140～180℃ is taken as the raw material C. The above three raw materials A, B and C are prepared according to the mass ratio of 1:1.5～3.0:1.5～3.0 C5/C9 petroleum resin polymerization raw material D;
After dehydrating the above-mentioned polymerization raw material D through a 4A molecular sieve packing tower,Petroleum Resin selective hydrogenation is performed with a Pd/Al2O3 catalyst to remove alkyne,Petroleum Resin and then 0.05 to 0.5 wt% of FriedelCrafts catalyst is added, then prepolymerized at room temperature for 0.5 to 1.5 hours,Petroleum Resin and then calcium hydroxide The catalyst is removed from the mixture with methanol, and after distillation,Petroleum Resin the polymer raw material fraction E having a boiling point of 25 to 180°C is obtained;Petroleum Resin the above polymerized raw material E is prepolymerized in a high-pressure reaction kettle with stirring at a temperature of 180°C to 230°C for 3 to 5 hours. Obtain the dimerization product F of Centaolefin and Styrene or Methyl Styrene;
Using the above-mentioned dimerization product F as a raw material,Petroleum Resin mixing with a diluting solvent at a mass ratio of 1:0.1 to 1.0,Petroleum Resin and adding a gaseous boron trifluoride catalyst accounting for 0.1 to 0.5% of the total mass of the material to catalyze polymerization at 30 to 65°C 2 to A dark yellow to brown polymerization solution was obtained in 5 hours. The polymerization solution was stripped of the catalyst with a mixture of calcium hydroxide and methanol to obtain a pale yellow resin solution;Petroleum Resin the above resin solution was subjected to electrical desalination and dehydration treatment at 50 to 80° C. Pass active Al2O3 solid bed at ℃;
The C5/C9 petroleum resin solution after the above pretreatment is dissolved in a dilution solvent at a mass ratio of 1:1 to 5, and is subjected to a hydrogenation reaction in the presence of a modified Pd catalyst to obtain a hydrogenated diluted resin solution. ～295℃, reaction hydrogen pressure is 10.0～17.0MPa,Petroleum Resin reaction space velocity is 0.125～0.333h/1, reaction time is 3～8h;Petroleum Resin remove the solvent and low Polymer,Petroleum Resin that is, C5/C9 hydrogenated petroleum resin.
