Under the action of acid catalyst, the pitchresin was synthesized by using aromatic hydrocarbon enriched raw material from FCC slurry.
以催化裂化油浆富芳烃馏分为原料，在酸性催化剂的作用下合成了沥青树脂。
2
The results show that when the amount of pitch or resin with certain additives is selected appropriately, magnesia fling refractories with good performance are gotten.
结果表明，控制配入合适溶剂的沥青或树脂的加入量，掺加少量外加剂，可获得性能良好的修补料。
3
Several pitch control agents, PEO, LS, CPAM and PAC, were evaluated in their performance of reducing resin deposits. All of them showed obvious control effects but different working mechanisms.