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DOI:10.19476/j.ysxb.1004.0609.2019.07.20 Purolite A172树脂对铼和钼的静态分离 刘 伟1, 2,丁留亮1,2,朱鹏飞1,2,李继文1,魏世忠2, 3 (1. 河南科技大学 材料科学与工程学院,洛阳 471023； 2. 河南省耐磨材料工程技术研究中心,洛阳 471003； 3. 河南省高温结构与功能材料重点实验室,洛阳 471003) 摘 要:针对目前溶液体系中铼和钼分离困难的问题,通过树脂选型确定选用中强碱性阴离子交换树脂Purolite A172分离铼和钼,研究A172树脂对铼的吸附性能和对铼-钼的分离性能.结果表明:A172树脂吸附铼的反应为放热反应,而且吸附速率很大,吸附速率常数k298 K=7.719×10-4 s-1,受内扩散控制,树脂对铼的静态饱和吸附容量达到340.13 mg/g湿树脂；当铼溶液......
solution on Purolite S957, a commercially available cationic ion-exchange adsorbent. Experiments were conducted using aqueous copper sulfate solutions containing either single or conjoint ions, using... of Sb(III) alone is endothermic, whereas the process becomes exothermic in the Sb(III)-Fe(II) system. Key words: Sb(III); ion exchange; copper refining; thermodynamics; kinetics; Purolite adsorbent 1......
硅烷接枝交联聚乙烯的研究 李锦春1,俞强1,林明德1,吕海波1 (1.江苏石油化工学院材料系,常州,213016) 摘要:用不同结构的乙烯基硅烷与聚乙烯进行熔融接枝及水解缩合交联反应,通过对接枝物的结构表征,交联行为以及交联前后结晶性能,高温应力~应变曲线的测定,研究了不同结构的乙烯基硅烷对硅烷与聚乙烯的接枝反应和交联反应的影响.结果表明,不同烷氧基的硅烷在接枝,交联性能上存在较大差异;接枝反应的活性与烷氧取代基的空间位阻效应和电子效应有关;在A172接枝情况下,接枝大分子自由基的终止方式在促进接枝和大分子支化方面起着重要的作用;交联反应的速率与烷氧基的水解缩合反应能力有关,而交联程度则取决于硅烷的接枝率.由于交联网络的存在,硅烷交联聚乙烯的高温力学性能显著提高,交联密度决定了其抵抗变形的能力,硅烷接枝交联后,聚乙烯的结晶速率,熔点和结晶度都有不同程度的降低. 关键词:乙烯基硅烷......
]. Dowex 50W-X8, Lewatit TP, Lewatit S 567, MTC 1600, Tulsion CH93, AmberliteTM IRN 77H, Purolite S95, Purolite 260, Purolite D5041 and Purolite C100, are all reported as testbeds for various ion separation regimes [15,28-30]. These resins and many more experimental polymers have shown different degrees of success but the Purolite C100 [17,29] and Dowex 50W-X8 [6,28] have a better track record......
4.78%,钒含量较低,为0.02%,其中镓含量为0.11%.图1所示为镓精矿原料的XRD分析结果.由图1可知,镓精矿主要物相为2Al2O3·4SO3·8H2O和KAl3(SO4)2(OH)6,未能发现含镓物相特征峰.其他实验原料主要有镓吸附树脂(Purolite D5240),以及分析纯的硫酸,氢氧化钠和氧化钙. 表1 镓精矿多元素分析结果 Table 1 ...86.51和14.35 mg/L.当进料液超过30 BV时,树脂接近饱和,吸附后液中镓和钒浓度分别为345.71 mg/L和59.62 mg/L.镓的吸附率为38.23%,原始浓度为360 mg /L,镓的总吸附量Qc约为302.57 mg；钒的吸附率为43.11%,钒的总吸附量Qc为61.60 mg.由此可知,Purolite D5240树脂对镓和钒的饱和吸附容量分别为4.81和1.02 g/L......
solution by Lewatit cation-exchange resin [J]. Journal of Hazardous Materials, 2009, 167(1/3): 915-926. [13] HAMDAOUI O. Removal of copper(Ⅱ) from aqueous phase by Purolite C100-MB cation exchange... by synthetic resin purolite C100 [J]. Journal of Hazardous Materials, 2009, 169(1/3): 190-194. [15] XIONG Chun-hua, YAO Cai-ping. Preparation and application of acrylic acid grafted polytetrafluoroethylene......
. Approaching theoretical capacity of LiFePO4 at room temperature at high rates [J] . Electrochem and Solid State Lett , 2001, 4(10): A170 - A172. [11]Chen Z, Dahn J R. Reducing carbon in LiFePO4/ C composite......
Materials, 2006, 136(3): 770-775. [22] Jayasinghe N S, Lucien F P, Tran T. Ion-exchange equilibria for [Au(CN)2]-/Cl- and Au(CN)2-/SCN- on purolite A500 in mixed solvents at 303 K [J]. Industrial &......
. As commercial Purolite S984 resin, the adsorption selectivity coefficient α(Cu/Ni) increased from 1.2 to 370 while the initial molar concentration ratio of Ni(II) to Cu(II) varied from 1:1 to 2000:1 [35]. When the initial molar concentration ratio of Ni(II) to Cu(II) was 2000:1, the adsorption selectivity coefficients α(Cu/Ni) of the Si-AMPY-1 resin and commercial Purolite S984 resin were 1566.55......
]. Nonferrous Metals (Extractive Metallurgy), 2018(7): 31-34. [37] FATHI M B, REZAI B,ALAMDARI E K. Competitive adsorption characteristics of rhenium in single and binary(Re-Mo) systems using Purolite......
