塔拉单宁提取和精制工艺对络合沉锗率影响  

Effects of Extraction and Refining Technology of Tara Tannin on Complexing Precipitation of Geranium

作　　者：秦清[1] 仲崇茂 徐浩[1] 杜运平[1] 常连举 

机构地区：[1]中国林业科学研究院林产化学工业研究所,生物质化学利用国家工程实验室,国家林业局林产化学工程重点开放性实验室,江苏省生物质能源与材料重点实验室,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》2012年第2期79-82,共4页Chemistry and Industry of Forest Products

基　　金：国家林业局林业公益性行业科研专项(201004013)

摘　　要：以秘鲁原产塔拉粉为原料,以矿业生产用硫酸锌锗前液的沉锗率为指标,探讨塔拉单宁的提取、纯化、提取物后处理等条件对提高单宁沉锗率的影响。结果表明:以塔拉粉为原料,有机溶剂(甲醇、乙醇、乙酸乙酯)替代水萃取,提取物的沉锗率均大于98%;提取物分别经活性炭脱胶,盐析水洗脱胶,以1%氯化铵和1%次氮基三乙酸进行络合处理,均能有效地降低产物的非单宁成分,提升沉锗效率,可满足工业化应用的要求;当使用塔拉粉与倍花粉的质量比8∶2为混合原料,并对萃取浓胶进行络合处理制成的沉锗剂,沉锗率为99.05%,有助于产物成本的降低和沉锗效率的提高。Using tara powder from Peru as raw material,rate of Ge precipitation from industrial mining liquor contaning zinc sulfate and germanium ion as index,the effects of extraction,refining and post-processing of tara extracts on the rate of Ge precipitation were studied.The results showed that using organic solvents（methanol,ethanol,ethyl acetate） extraction instead of water extraction,rate of Ge precipitation was more than 98%.Degumming of the extract with activated carbon and salting washing as well as through complexation by adding 1 % sodium chloride ammonium and 1% nitrilotriacetic acid effectively reduced non-tannin content in the product and enhanced the rate of Ge precipitation.When tara powder and gall flower of mixed in 8 ∶ 2 as raw material,followed by complexation of the extract,the rate of Ge precipitation reached 99.05%.The cost of the product was reduced,as well.

关 键 词：塔拉单宁 沉锗率 

分 类 号：TQ35[化学工程]