<正>以水解木质素为原料,用化学法(ZnCl2为活化剂)制备药用活性炭。研究活化温度、活化时间、料液比(水解木质素与化学药品活化剂溶液的重量比)等对活性炭的得率、硫酸奎宁吸附值和亚甲基蓝吸附值的影响;确定了用水解木质素制备药用活性炭适宜的工艺条件:活化温度为550℃,活化时间为2h,料液比为1∶3.5,ZnCl2溶液浓度为46°Be′(60℃)。结果表明,药用活性炭的得率为50.28%;活性炭的硫酸奎宁吸附值≥120mg/g,亚甲基蓝吸附值180mg/g,pH6.5,铁0.01%,氯化物0.05%,硫酸盐0.05%,灰分2.63%,酸溶物0.6%,水溶性锌盐0.003%,硫化物、重金属(以Pb计)、氰化物、未炭化物均为合格。

An activated carbon for refinement of injection was prepared from hydrolysis lignin by a chemical method(ZnCl2 as activator).The effects of the ligninliquid ratio,activation temperature and time on the yield,quinine sulfate adsorption and methylene blue adsorption of the activated carbon were researched.The suitable technological conditions were determined: activation temperature 550 ℃,activation time 2 h,ligninliquid ratio 1∶3.5,ZnCl2 concentration 46°Be′(60 ℃).The yield of activated carbon produced on the above conditions was 50.28%.The properties of the obtained activated carbon were investigated.The results are quinine sulfate adsorption≥120 mg/g,methylene blue adsorption 180 mg/g ,pH 6.5,Fe 0.01%,Cl- 0.05%,SO2-4 0.05%,ash 2.63%,acidsoluble substance 0.6%,zine salt 0.003%,and sulfide,heavy metals,cyanide,uncarbonized constituent are all qualified.