催化油浆重质芳烃制备沥青树脂

Synthesis asphalt resin from heavy aromatic of catalytic slurry

以催化油浆重质芳烃为原料,苯甲醛为交联剂,在浓硫酸作催化剂条件下,合成沥青树脂。采用FTIR探究了反应机理,采用TGA考察了合成树脂的热重反应性能。通过单因素实验,考察了合成条件对沥青树脂软化点、残炭量、收率的影响。结果表明,反应机理为质子催化下的缩聚反应;合成树脂的工艺条件为:交联剂用量70%,反应时间为5 h,反应温度为130℃,催化剂用量为6%。合成树脂的收率为83.2%,残炭量为27.6%,软化点为76.5℃。

Asphalt resin has been synthesized using heavy aromatic as monomer and benzaldehyde as cross-linking agent in the presence of concentrated sulfuric acid. FTIR was used to study the reaction mechanism. The thermal weight loss behavior of the synthesized resin was characterized by TGA. The effects of synthesis conditions on the softening point and carbon residue of the pitch resin as well as its yield were investigated by single factor experiments. The results showed that the reaction of heavy aromatic and benzaldehyde is a positive ion-typed condensation polymerization catalyzed by acid. The suitable con-ditions for synthesizing the asphalt resin were：the usage of crosslinkers 70%,the reaction time of 5 h, the reaction temperature of 130 ℃ and the usage of catalyst 6%. Under the optimal conditions, the asphalt resin exhibits the yield of 83. 2%,the carbon residue of 27. 6% and the softening point of 76. 5 ℃.