DSD酸氧化缩合废水浓缩液回用试验研究  

Research on Recycling of Concentrated Solution of Oxidation-Condensation Wastewater in 4,4-diaminostilbene-2,2-disulphonic Acid Production

作　　者：周明艳[1] 李中和[1] 祝万鹏[1] 杨志华[1] 赵清[2] 

机构地区：[1]清华大学环境科学与工程系,北京100084 [2]中国石化工程建设公司毕派克环境工程公司,北京100029

出　　处：《化工环保》2002年第2期63-67,共5页Environmental Protection of Chemical Industry

基　　金：国家"九五"科技攻关子专题 (96 90 9 0 5 0 1 0 3)

摘　　要：研究了DSD酸氧化缩合废水浓缩液回用到原生产过程的可行性。对DSD酸氧化缩合废水可采用萃取技术分离出其中 97%的有机物 ,反萃产生的 4～ 8倍的浓缩液返回到DSD酸生产中的氧化缩合单元后 ,可提高DNS酸的收率约 7.4 3% ,且不会明显影响产品的纯度。浓缩液 8次循环套用试验的结果表明 ,虽然DSD酸氧化缩合废水的COD从 15 0 0 0～ 2 0 0 0 0mg/L提高到 2 0 0 0 0～ 2 90 0 0mg/L ,但没有显著持续增长的趋势 。The feasibility of recycling concentrated solution of wastewater from 4,4 diaminostilbene 2,2 disulphonic acid (DSD) oxidation condensation in original production process has been explored. 97% of organic pollutants in the wastewater can be removed by extraction. 4～8 fold concentrated solution made by stripping is recycled to DSD acid oxidation condensation unit, improving dinitric acid yield by 7.43% and not decreasing remarkably the product purity. 8 time recycling experiments indicate that COD concentration in the wastewater doesn't increase continuously although it jumps from 15000～20000 mg/L to 20000～29000 mg/L, which show that the by product concentration in reaction solution is controlled effectively.

关 键 词：4 4'-二氨基二苯乙烯-2 2’-二磺酸 浓缩液 回用 DSD酸 氧化 缩合 废水 

分 类 号：X788[环境科学与工程—环境工程]