氢氧化铝沉淀法从煤层气田产出水中吸附锂的方法探索  

Study on adsorption of Li^+ from water produced with coalbed methane by precipitation of Al(OH)_3

作　　者：刘新春[1] 王斌[2] 刘研萍[2] 李娟[1] 余志晟[1] 钱智[1] 陶莹 琚宜文[1] 张洪勋[1] 

机构地区：[1]中国科学院研究生院资源与环境学院,北京100049 [2]北京化工大学环境科学与工程系,北京100029 [3]河南源通环保工程有限公司,河南开封475000

出　　处：《化工矿物与加工》2012年第9期20-22,37,共4页Industrial Minerals & Processing

基　　金：国家科技重大专项(2009ZX05039-003);国家科技重大专项(2011ZX05060-005)

摘　　要：煤层气在开采的过程中会产生大量伴生水,经过反渗透处理后的浓水中含有Li+等多种离子,本文以山西某煤层气田产出水经反渗透处理后的浓水为样本,按照一定的比例配水进行Li+吸附试验,结果显示:在50℃,不断搅拌,m(Al)/m(Li)为3.3,m(Na)/m(Al)为2.6,2mol/L的NaOH溶液的滴加速率为10mL/min的条件下,反应1.5h后,有明显吸附效果的最低Li+质量浓度为0.5g/L,Li+沉淀率为86.57%。将煤层气田产出水经反渗透处理的浓水浓缩600倍,使其中Li+质量浓度达0.5g/L,按照配水试验条件进行Li+吸附试验,Li+沉淀率为86.17%。A large amount of produced water was generated with coalbed methane production process. The RO concentrated water contains Li＋ and a variety of other ions. Water distribution according to concentrated water of coalbed methane produced wa- ter treated by RO is used in this paper. Under the conditions of 50 ℃, stirring constantly, controlling m （A1）/m （Li） = 3. 3, m （Na）/m （A1） =2.6 and adding 2 mol/L NaOH solution at rate of 10mL/min for 1.5 h, the significant adsorption effect of the mini- mum concentration of Li＋ is 0.5 g/L, the sedimentation rate of Li＋ is 86. 57%. The RO concentrated water is processed 600 times, so that concentration of Li＋ is 0.5 g/L, and then adsorp- tion of Li＋ is made in accordance with the water distribution test conditions, the results show that Li＋ precipitation rate is 86. 17%.

关 键 词：氢氧化铝沉淀法 锂 煤层气田产出水 

分 类 号：TQ131[化学工程—无机化工]