深井卤水主微量元素提取与综合利用技术  

The Comprehensive Utilization and Extraction Technology of the Main and Trace Elements in the Deep Brine

作　　者：曾英[1] 谭秀民[2] 安莲英[1] 钟辉[1] 李陇岗[1] 

机构地区：[1]成都理工大学 [2]中国地质科学院郑州矿产综合利用研究所

出　　处：《科技资讯》2016年第10期171-172,共2页Science & Technology Information

摘　　要：该课题根据我国深井卤水的资源特征,选择四川邛崃平落海相沉积深井富钾卤水和湖北江陵凹陷深井富钾卤水2个目标区开展研究。两个目标区域2013年度的主要进展如下：（1）研究进展及主要认识：1）平落卤水工作区。1含铷体系介稳相关系研究：开展了含铷体系Li Cl＋KCl＋Rb Cl＋Mg Cl2＋H2O及其子体系多温介稳相关系研究,获取了钾、铷的氯化物等盐在复杂共存体系中各盐的析盐规律及析盐相区。研究结果表明：随着研究温度的升高,固溶体[（K,Rb）Cl]结晶相区减小,有利于纯盐KCl、Rb Cl的提取。2以t-BAMBP为萃取剂的铷钾萃取工艺实验：实验进行了二甲苯＋t-BAMBP萃取体系的优选,反萃可获得Rb含量为99.7%的富集液;以D80为稀释剂,考察萃取条件,分两段萃取,反萃可获得Rb含量〉97%的富集液;将D80和二甲苯按1∶1比例混合后作为t-BAMBP萃取体系的稀释剂,经4级萃取、6级水洗、2级反萃,可得到Rb Cl含量为99.2%的富集液。3氯化铷溶解性能及结晶动力学研究：实验测定了303.15K至343.15K温度范围内氯化铷在甲酸、冰乙酸、正丙醇和乙二醇溶液中的溶解度,拟合出对应的溶解度公式。测定了333.15-353 K下氯化铷在水溶液中的溶解度和介稳区宽度;以粒数衡算方程为基础,实验获得了氯化铷晶体的粒数密度分布数据,采用最小二乘法非线性回归出成核速率方程以及生长速率方程。4平落卤水萃取提硼试验：2,2,4-三甲基-1,3-戊二醇和CHCl3组成的萃取体系对平落卤水中硼具有较好的萃取效率,在优化的实验条件下,经一级萃取,二级反萃取,硼的回收率可达90.60%。2）江陵卤水工作区：①空气吹出法提取碘溴：碘吹出率在97%以上,吸收率在80%以上;溴吹出率在96%以上,吸收率在88%以上。②芒硝沉淀除钙：芒硝沉淀钙中硫酸钠加入量应为所需理论量的90%-100%,加入方式为一次性加完近饱和硫酸�The main developments in 2013 are as the follows.（1） Pingluoba：（1）Phase equilibria of rubidium containing system.The crystallization zones of [（K,Rb）Cl] decrease with increase of temperature, which is conducive to purify salt KCl and RbC l.（2）Extraction of Rb, K using t-BAMBP as extractant. Xylol as thinner, Rb content in enrichment liquid up to 99.7% by stripping. D80 as thinner, twice–stage extraction, Rb content up to 97% by stripping. D80：xylol=1∶1 as thinner, with4-stage extraction, 6–stage washing, 2–stage stripping, Rb content up to 99.2% by stripping.（3）Studies on solutionproperties and crystallization kinetics of RbC l. The solubilities of RbC l in organic solution, aqueous solution and its metastable zone width were determined at 303.15K-343.15 K. The population density data, nucleation equation and growth rate equation of RbC l crystals were regression fitted using Least Square method.（4）Extracting boron from Pingluoba brine. Using 2,2,4-trimethyl–1,3-pentanediol dissolved in chloroform as extractant, the recovery ration of boron reaches 90.62% for the process with 1–stage extraction and 2-stage stripping.（2） Jiangling：（1）Air blow–out method of extracting idoine and bromine. The blow out rate of idoine was up to 97%, bromine 96%, and the absorptivity of idoine was up to 80%, bromine 88%.（2）Mirabilite precipitation Ca. The amount of Na2SO4 added was about 90-100% of theoretical amount and added as saturated solution with one time to precipitate Ca. The precipitation rate of Ca was up to 85%.（3）The secondary separation of K and Na. The content of KCl product was up to 97%, which consistent with the Chinese Standard of the premium grade KCl. The average yield of KCl and Na Cl was 31.06% and 51.93%, respectively.（4）The extraction of Rb and Cs. Extraction Rb： using t-BAMBP as extractant and sulfonated kerosene as thinner. The optimal experimental parameters are obtained. In 2013, the research group has attended 2 times international conferenc

关 键 词：卤水 综合利用 钾 锂 硼 铷 

分 类 号：TQ026.5[化学工程]