Method of quickly and continuously preparing benzenediol from low-concentration water solution of phenol

The invention discloses a method of quickly and continuously preparing benzenediol from a low-concentration water solution of phenol and belongs to the field of organic chemistry. The benzenediol is prepared by catalyzing a phenol water solution, of which mass percentage is 3-6%, with a copper-based quaternary nano hydrotalcite-like catalyst, wherein the hydrotalcite-like compound is CuM2FeAl, the M2 being any one of Mg, Zn and Ni. The catalyst, in a hydroxylation reaction process, has excellent conversion rate and high selectivity. 本发明公开了种苯酚低浓度水溶液快速连续制备苯二酚的方法，属于有机领域，采用铜基四元类纳米水滑石催化剂催化质量百分数为3-6％的苯酚水溶液制备苯二酚；所述的类水滑石为CuMFeAl，其中M是Mg、Zn、Ni中的任意种。该催化剂在参与羟基化反应过程中，体现出良好的转化率和选择性。