Lignocellulosic micro-fines (LCMFs) were prepared from pine wood meal by glycol ether liquefaction using microwave irradiation for 90 s. The recovery method and reusability of the solvent (glycol ether) for the liquefaction process were examined. When the volume of the dehydrated recovered solvent was compared with that of the original solvent, the recovery rate was about 97% and this recovery rate remained similar even when solvent recycling was repeated. IR spectrum of the dewatered recovered reagent was very similar to that of the virgin reagent. The yield and residual lignin content of LCMFs prepared by primary and secondary recycled solvents were almost the same as those obtained using virgin solvents. Similarly, no difference was found in the particle size distribution, crystallographic index, and chemical properties of these LCMFs. In conclusion, LCMFs can easily be prepared by rapid microwave irradiation with glycol ether. Furthermore, wood liquefaction for LCMFs using glycol ether is a very economical method because the solvent can be recycled very simply.

中文翻译：

---

松木乙二醇醚微波快速液化制备木质纤维素微细粉的溶剂回收性评价

木质纤维素微细粉（LCMF）是由松木粉通过乙二醇醚液化并使用微波辐照90 s制备的。研究了液化过程中溶剂（乙二醇醚）的回收方法和可重复使用性。当将脱水的回收溶剂的体积与原始溶剂的体积进行比较时，回收率约为97％，即使重复溶剂再循环，该回收率也保持相似。脱水的回收试剂的红外光谱与原始试剂的红外光谱非常相似。由一级和二级循环溶剂制备的LCMF的产率和残留木质素含量与使用纯溶剂获得的LCMF几乎相同。类似地，在这些LCMF的粒度分布，结晶指数和化学性质上也没有发现差异。总之，可以通过用乙二醇醚进行快速微波辐射来轻松制备LCMF。此外，使用乙二醇醚进行LCMF的木材液化是一种非常经济的方法，因为可以非常简单地回收溶剂。