2,3,4,4′-四羟基二苯甲酮的精制  

Refinement of 2,3,4,4′-Tetrahydroxybenzophenone

作　　者：王光辉[1] 张宗和[1,2] 仲崇茂 杜运平[1] 

机构地区：[1]中国林业科学研究院林产化学工业研究所 江苏省生物质能源与材料重点实验室 国家林业局林产化学工程重点开放性实验室,江苏南京210042 [2]南京龙源天然多酚合成厂,江苏南京210032

出　　处：《林产化学与工业》2010年第4期33-37,共5页Chemistry and Industry of Forest Products

基　　金：国家林业局948技术引进项目(2009-4-60)

摘　　要：对经过脱色的2,3,4,4′-四羟基二苯甲酮粗品进行色谱柱与微孔滤膜吸附分离试验,考察了滤膜孔径与操作压力对分离效果的影响,同时对吸附过的色谱柱进行脱附再生试验,考察了洗脱温度及洗脱液用量对洗脱效果的影响。实验结果表明,在色谱柱与微滤膜装置串联时,微孔滤膜孔径0.2μm,操作压力0.06MPa吸附分离效果最佳,得到产品指标为：质量分数≥99.5%,金属杂质Ca2＋、Fe3＋、Na＋≤200μg/L;此外,80℃下,用300mL50%的乙醇水溶液洗脱吸附后的色谱柱,再生效果理想。After discoloration, crude 2,3,4,4′-tetrahydroxybenzophenone, was adsorbed and separated by chromatographic column and micro-porous membrane, the impacts of membrane aperture and operating pressure on separation effect were studied. Furthermore, the adsorption-desorption regenerating test of the used column was done, the impacts of temperature and the amount of eluate on elution results were investigated. The results showed that the optimum separation conditions were： membrane aperture 0.2μm, pressure 0.06MPa, working the column in series with micro-porous membrane. Under these conditions the indices of the product were as follows： mass fraction ≥99.5%, impurities of Ca2＋, Fe3＋, Na＋≤200μg/L. Using 300mL 50% ethanol as eluant for the regeneration of the used column, the desired results were obtained.

关 键 词：电子化学品 2 3 4 4′-四羟基二苯甲酮 金属杂质 微孔膜 

分 类 号：TQ351[化学工程]