白蜡枝桠材在四氢萘与苯酚混合 供氢溶剂中的液化工艺

通过正交试验考察了白蜡枝桠材在四氢萘与苯酚混合供氢溶剂中液化过程的5个因素对残渣率的影响。白蜡枝桠材在供氢溶剂中的优化工艺为:反应温度为150℃、时间为2.5 h、木酚比为1:6、催化剂H₂SO₄用量为6.5%、四氢萘用量为20%,在此工艺条件下,液化效率可以达到96%左右。各因素的影响次序为:时间>温度>木酚比和催化剂用量>四氢萘用量。在选择的实验参数范围内,时间、木酚比和四氢萘用量越大时,白蜡枝桠材的液化残渣率越小,即液化效率越高。

Liquefaction of Branches of Fraxinus Chinensis Roxb. in the Tetralin-phenol Hydrogen-donor Solvents

The effects of five factors on residue rate during the liquefaction of branches of Fraxinus chinensis Roxb. in tetralin-phenol hydrogen-donor solvents were investigated by orthogonal test. The optimal conditions were:reaction temperature 150℃,time 2.5 h, mass ratio of wood to phenol 1:6,catalyst (H₂SO₄) dosage 6.5%, tetralin dosage 20%. The liquefaction efficiency was 96% in above conditions. The sequence of factors were: time>temperature>mass ratio of wood to phonol=catalyst dosage>tetralin dosage. The bigger of time, mass ratio of wood to phenol, and tetralin dosage, the smaller of residue rate of liquefaction or the higher of liquefaction efficiency.