南京林业大学学报(自然科学版) ›› 1990, Vol. 14 ›› Issue (04): 84-89.doi: 10.3969/j.jssn.1000-2006.1990.04.016

• 研究论文 • 上一篇    下一篇

试剂单宁酸制造方法

冯辉明;张国伟;单群   

  1. 南京林业大学林产化学工程系;南京林业大学林产化学工程系;南京林业大学林产化学工程系
  • 出版日期:1990-12-18 发布日期:1990-08-18

THE MANUFACTURING METHOD OF REAGENT TANNIC ACID

Feng Huiming Zhang Guowei Shan Qun   

  1. Department of Forest Products Chemistry and Engineering
  • Online:1990-12-18 Published:1990-08-18

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.