双极膜电渗析解离溴化钠废水回收溴化氢的试验研究  

Experimental Study on the Recovery of Hydrogen Bromide from Sodium Bromide Wastewater Dissociated by Bipolar Membrane Electrodialysis

作　　者：徐娟娟 卜云龙 XU Juanjuan;BU Yunlong(Beijing SINO-SCI COLUMBUS Energy Technology Co.,Ltd.,Beijing 100088,China;HNU-ASU Joint International Tourism College,Hainan University,Haikou 570208,China)

机构地区：[1]北京中科康仑能源科技有限公司,北京100088 [2]海南大学国际旅游学院,海口570208

出　　处：《中国资源综合利用》2024年第7期17-20,共4页China Resources Comprehensive Utilization

摘　　要：精对苯二甲酸(Pure Terephthalic Acid,PTA)是一种重要的石油化工产品,高温氧化法制备PTA时广泛应用溴化氢作为促进剂,但会产生高浓度的溴化钠废水。试验采用双极膜电渗析解离模拟溴化钠废水,同时回收溴化氢,研究反应时间、初始盐浓度和电流密度对产物浓度的影响,探索该技术应用到石油化工行业溴化钠废水高值化处理和资源循环利用的可行性。结果表明,随着反应时间的推移,酸室的酸浓度和碱室的碱浓度逐渐增加,反应140 min后,酸浓度和碱浓度的上升速率变慢,均维持在一定水平;初始盐浓度越高,酸浓度和碱浓度越高,可以获得浓度2 mol/L的氢氧化钠溶液和浓度2 mol/L的溴化氢溶液;电流密度越大,反应时间越短,酸浓度和碱浓度升高速率越快,但电流效率降低。Pure Terephthalic Acid(PTA)is an important petrochemical product,and hydrogen bromide is widely used as a promoter in the high-temperature oxidation method to prepare PTA,but it produces high concentration sodium bromide wastewater.The experiment uses bipolar membrane electrodialysis to dissociate the simulated sodium bromide wastewater,and simultaneously recovering hydrogen bromide,and studies the effects of reaction time,initial salt concentration,and current density on product concentration,and explores the feasibility of applying this technology to high-value treatment and resource recycling of sodium bromide wastewater in the petrochemical industry.The results show that with the passage of reaction time,the acid concentration in the acid chamber and the alkali concentration in the base chamber gradually increase,after 140 min of reaction,the rate of increase in acid concentration and alkali concentration slows down and remains at a certain level;the higher the initial salt concentration,the higher the acid and alkali concentrations,and the sodium hydroxide solution with a concentration of 2 mol/L and the hydrogen bromide solution with a concentration of 2 mol/L can be obtained;the higher the current density,the shorter the reaction time,and the faster the rate of increase in acid and alkali concentrations,but the current efficiency decreases.

关 键 词：双极膜电渗析 溴化钠废水 溴化氢 回收 资源化 

分 类 号：TQ222.23[化学工程—有机化工] X703[环境科学与工程—环境工程]