药渣木质素定向解聚制备高密度航油合成原料

PREPARATION OF FEEDSTOCK FOR HIGH DENSITY JET FUEL SYNTHESIS BY TARGETED DEPOLYMERIZATION OF LIGNIN FROM PHARMACEUTICAL RESIDUES

以三叉苦药渣木质素为原料,在低共熔溶剂(ChCl-MeOH-AlCl_(3)·6H_(2)O)与催化剂(Cu(OAc)_(2)/邻菲罗啉)耦合作用下解聚生成高密度航油合成原料,考察不同反应温度、时间、固液比、催化剂添加量与氧气含量对木质素催化氧化解聚效果的影响。结果表明:在固液比1∶30 g/mL,木质素、Cu(OAc)_(2)、邻菲罗啉的质量比1∶1∶1,3 MPa氧压,60℃条件下反应3 h后,木质素选择性解聚生了芳香醛酮类高密度航油合成原料,木质素转化率达到80.84%,香草乙酮与香草醛收率分别为16.69%和34.39%。

Herein,Lignin from evodia lepta was used as raw material to depolymerize under the coupling of deep eutectic solvent(ChCl-MeOH-AlCl_(3)·6H_(2)O)and catalyst(Cu(OAc)_(2)/1,10-phenanthroline)to generate feedstock for synthesising high-density jet fuel,and the effects of different reaction temperatures,times,solid-liquid ratios,catalyst additions and oxygen pressures on the catalytic oxidative depolymerization of lignin were investigated.The results showed that under the conditions of solid-liquid ratio of 1∶30 g/mL,mass ratio of lignin to Cu(OAc)_(2) and 1,10-phenanthroline of 1∶1∶1,oxygen pressure of 3 MPa and 60℃for 3 h,the lignin was selectively depolymerized to produce aromatic aldehydes and ketones used as feedstock for synthesizing high-density jet fuel.The lignin conversion rate reached 80.84%,and the yields of acetovanillone and vanillin were 16.69%and 34.39%,respectively.