流速对D403型树脂从盐湖卤水中提取硼酸的影响研究          下载免费PDF全文

孔亚杰  李海民  韩丽娟 《盐湖研究》2006,14(1):46-48

针对流速对D403型苯乙烯系多羟基类弱碱性硼特效离子交换树脂从盐湖卤水中提取硼酸的影响进行了研究,讨论了这种树脂对硼的吸附量与卤水流速的关系。  相似文献   

利用选择性特效树脂富集分离岩石样品中的锶钐和钕     

韦刚健  刘颖  涂湘林  梁细荣  李献华 《岩矿测试》2004,23(1):11-14

使用目前国际上几种常用的特效树脂:锶树脂(SR)、稀土树脂(RE)和镧系树脂(LN)对岩石样品中Sr、Sm和Nd的分离富集效果进行了试验,结果表明,按厂家提供的流程,SR树脂可回收98%左右的Sr,而且残余的Rb不到2%;RE树脂回收的Sm和Nd只有70%左右;而联合利用RE和LN树脂,并配合SR树脂的使用,可以将Sm和Nd的回收率提高到90%左右;LN树脂可以很好地分离Sm和Nd,并且回收的Nd可占总样量的85%左右.  相似文献   

Separation of Clay Minerals from Host Sediments Using Cation Exchange Resins     

S.Ismael H.M.Baioumy 《中国地球化学学报》2003,22(4):337-344

Classic physical and chemical treatments applied to separating clay minerals from the host sediments are often difficult or aggressive for clay minerals. A technique using cation exchange resins (amberlite IRC-50H and amberlite IR-120) is used to separate clay minerals from the host sediments. The technique is based on the exchange of cations in the minerals that may be associated clay minerals in sediments, such as Ca and Mg from dolomite; Ca from calcite, gypsum and francolite with cations carried by resin radicals. The associated minerals such as gypsum, calcite, dolomite and francolite are removed in descending order. Separation of clay minerals using cation exchange resins is less aggressive than that by other classic treatments. The efficiency of amberlite IRC-50H in the removal of associated minerals is greater than that of amberlite IR-120.  相似文献   

P204萃淋树脂对地质样品中痕量铌和钽的分离富集研究及其应用   总被引：2，自引：1，他引：2       下载免费PDF全文

姜莹  孙海玲钱程 《岩矿测试》2003,22(1):33-36

研究结果表明，P204萃淋树脂在0．5—3mol／L HCl介质吸附钽，在1—8mol／L HCl介质吸附铌，1—3mol／L HCl介质中可同时吸附铌、钽。H2SO4 H2O2溶液解脱铌，酒石酸 HCl溶液解脱钽，H2SO4 H2C2O4溶液能同时解脱铌、钽，从而建立了新的铌和钽分离富集体系。分离后的铌、钽用光度法测定。方法用于测定地质样品中的铌和钽，结果与标准值符合，其RSD(n＝7)分别＜6％和9％。  相似文献   

High Precision Hf-W Isotopic Measurements in Meteoritic Material Using Negative Thermal Ionisation Mass Spectrometry (NTIMS)   总被引：1，自引：0，他引：1  

Ghylaine Quitté  Jean-Louis Birck  Françoise Capmas  Claude J. Allègre 《Geostandards and Geoanalytical Research》2002,26(2):149-160

This paper presents a two-stage anion-exchange procedure for tungsten extraction, an improved mass spectrometric procedure for tungsten analysis and a simplified chemical separation and TIMS procedure for the determination of Hf concentrations. The chemical separation of tungsten is based on its complexing properties with HF and H₂O₂. The blank level for a sample size of 300 mg is about 80 pg for tungsten. The procedure is designed for the high sensitivity of negative thermal ionisation mass spectrometry (NTIMS) provided by the use of Mg oxide as an emitter on Ir filaments. Tungsten can be readily measured with a high precision in various meteoritical material and especially in small W-poor silicate fractions. Samples containing as little as a few ng g^-1 tungsten can be analysed reliably with this method.  相似文献   

金在树脂相表面化学发光行为的研究   总被引：5，自引：0，他引：5  

李俊锋  王洪艳等 《岩矿测试》2002,21(3):175-178

研究了金在树脂相表面吸附、发光行为、实验方法、仪器装置和仪器工作参数，建立了金的在线分离、富集发光检测新方法。pH值小于1的含金试样，通过装有717阴离子交换树脂脂柱后，金被定量吸队，通以碱性鲁米诺溶液，产生定量化学发光信号，方法的线性范围为0－0.200mg/L，检出限为0.003mg/L。结合金矿石国家二级标准物质分析验证，结果与标准值无显著性差异，RSD（n=10)为2.0%。  相似文献   

410哌啶树脂在分离富集中的应用研究 Ⅱ.岩矿中痕量金银铊镓铟的分离富集     

李玉珍  饶竹  朱玉伦 《岩矿测试》1993,(1):1-5

研究了在HCl(或HBr)介质中410哌啶树脂对Au~(3+)、Ag~+、Tl~(3+)、Ga~(3+)和In~(3+)的吸附特性,考察了被吸附金属离子的分组洗脱或分别顺序洗脱条件,拟定了地质样品中上述诸离子的分离富集程序。经地质标样分析验证,方法可行。  相似文献   

Retene and resin acid concentrations in sediment profiles of a lake recovering from exposure to pulp mill effluents     

Harri Leppänen  Aimo Oikari 《Journal of Paleolimnology》2001,25(3):367-374

The stratigraphy of resin acids (pimaric, isopimaric, sandaracopimaric, dehydroabietic and abietic acids) and base neutral compounds (retene, tetrahydroretene, dehydroabietin and fichtelite) in sediments of a lake recovering after the mill closure from exposure to effluents from sulphite pulp mill was studied. The highest concentrations of these compounds were detected 1.5 km downstream from the effluent pipe in sediment depth of 7–11 cm. This sediment layer is approximately 30 yrs old. The highest concentration of resin acids was 1100 and of retene 3300 g/g d.w. The retene concentration observed is the highest reported in the literature so far. The results imply that high concentrations of retene may be common in sediments of Finnish lakes polluted by pulp mill effluents.  相似文献   

阴离子树脂-活性炭分离富集等离子体发射光谱法测定富钴锰结壳中的痕量金银铂钯   总被引：10，自引：1，他引：10  

李展强张汉萍  张学华李其英 李锡坤 《岩矿测试》2005,24(2):141-144

采用717阴离子树脂活性炭联合交换分离富集技术,电感耦合等离子体发射光谱法同时测定富钴锰结壳中痕量金、银、铂、钯。方法检出限四元素分别为:Au1. 3、Ag0. 4、Pd0. 6、Pt4. 8ng/g。样品加标回收率在89. 0% ~110. 3%,相对标准偏差3. 5% ~7. 8% (n=4)。方法已用于富钴锰结壳中痕量金银铂钯的测定。  相似文献   

离子交换树脂催化合成丙烯酸正丁酯   总被引：2，自引：0，他引：2  

许文苑  熊国宣  彭道峰 《华东地质学院学报》2000,23(4):328-331,338

论述了以丙烯酸、正丁醇为原料,离子交换树脂作催化剂,催化合成丙烯酸正丁酯的新工艺。考察了催化剂种类、用量、原料配比、反应时间、阻聚剂用量以及催化剂使用次数等因素对酯化率的影响,确定了催化剂种类和最佳工艺条件。结果表明,７３１强酸性离子交换树脂具有良好的催化活性和选择性,可多次重复使用,酯化率可达８２．０％,产品质量符合国家标准,该工艺操作简单,条件容易控制,对环境无污染。  相似文献