摘要
<正>用热水溶解工业单宁酸,使其冷冻澄清,再经离子交换树脂处理,单宁酸含量超过92％,灼烧残渣含量低于0.031％,钠离子0.0083％,无铅和铁离子,达到试剂级单宁酸的技术指标。
Abstract
Industrial tannic acid is dissolved by hot water. The solution is refrigerated and settled. The settled solution is treated with ioncxchangc resin. By means of refrigeration-settle and ion exchange, tannic acid content is increased up to more than 92%, residual content of combustion is decreased less than 0.0031% sodium ion is 0.0083% and these are no fewifcrous and lead ion in the product. Tannic acid quality comes up to the technical index for reagent grade tannic acid.
冯辉明;张国伟;单群.
试剂单宁酸制造方法[J]. 南京林业大学学报（自然科学版）. 1990, 14(04): 84-89 https://doi.org/10.3969/j.jssn.1000-2006.1990.04.016
Feng Huiming Zhang Guowei Shan Qun.
THE MANUFACTURING METHOD OF REAGENT TANNIC ACID[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 1990, 14(04): 84-89 https://doi.org/10.3969/j.jssn.1000-2006.1990.04.016
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