Distilling the waste liquid, lignin could be obtained, the yield of which reached to 82.11% of the content of lignin in the raw material, and the recovery yield of lignin arrived 98.75%.

• 通过付有机溶剂法所得的废液进行蒸馏，可得到木质素，其得率为原料中所含木质素的82.；11%25，回收率达98