the process of combining rectification with secondary solvent crystallization was adopted to extract biphenyl from WOR1,and the biphenyl with purity of 99.36% and a yield of 47.7% could be obtained.

• 以WOR-1为原料；采用精馏、二次结晶的工艺；可以获得纯度为99.；36%25的联苯；收率47