双极膜电去离子过程制备四甲基氢氧化铵  

TETRAMETHYL AMMONIUM HYDROXIDE PRODUCTION BY ELECTRODEIONIZATION PROCESS WITH BIPOLAR MEMBRANE

作　　者：边艳芳[1] 王建友[1] 董恒[1] 赵健[1] 吴志强[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071

出　　处：《水处理技术》2011年第2期35-38,41,共5页Technology of Water Treatment

基　　金：国家高技术研究发展计划(863)项目(2007AA06Z330);天津市科技支撑计划重点项目(09ZCKFSH01800)

摘　　要：采用酸室填充离子交换树脂的双极膜电去离子(BMEDI)装置,以四甲基氯化铵(TMAC)为原料制备四甲基氢氧化铵(TMAH)。研究了树脂体积比、电流密度和原料浓度对TMAH制备过程的影响,并对2种不同的均相阴膜进行了对比考察。结果表明,在电流密度40 mA.cm-2,原料TMAC浓度0.1 mol.L-1的条件下,TMAH转化率可达91.2%。电流密度提高,TMAH转化率和过程能耗随之增大,在更高的原料浓度下可获得更高的电流效率,酸室填充100%阴树脂效果较好。此外,与JAM-10膜相比,UTX-UIF-A膜的面电阻较小,取得了更佳的试验效果。A special designed bipolar membrane electrodeionization （BMEDI） stack was adopted to to produce tetramethyl ammonium hydroxide （TMAH） from tetramethyl ammonium chloride （TMAH）.The acid compartment was filled with ion-exchange resins to reduce the electrical resistance. Effects of the volumetric ratio of resins, current density and TMAC concentration on the operating performance of the stack were investigated, respectively. In addition, the performance of two kinds of anion-exchange membrane were compared. With current density of 40 mA. cm-2 and TMAC concentration of 0.1 mol .L-1, the conversion rate of TMAH could reach 91.2%. It was found that conversion rate of TMAH and energy consumption increased as current density increased, and current efficiency increased as TMAC concentration increased. The optimal performance could be achieved when 100% anion resin was filled in the acid compartment. Furthermore, compared to the UTX-UIF-A membrane, the JAM-10 membrane obtained the better effect because of the lower membrane resistance.

关 键 词：电去离子 双极膜 四甲基氢氧化铵 

分 类 号：TQ028.8[化学工程]