两釜串联半连续氧化法合成4,4′-二硝基二苯乙烷-2,2′-二磺酸的研究  

Research of semi-continuous oxidative condensation of 4-nitrotoluene-2-sulfonic acid with two stirred tanks in series

作　　者：邹良库[1] 卢俊瑞[1] 尹宁[1] 孙常青 李阳[1] 

机构地区：[1]天津理工大学化学化工学院,天津300384 [2]河北衡水东港化工有限公司,衡水053000

出　　处：《天津理工大学学报》2010年第5期75-80,共6页Journal of Tianjin University of Technology

摘　　要：将两釜串联的半连续氧化工艺应用于对硝基甲苯邻磺酸的氧化缩合反应中,设计了阶梯控制工艺条件的技术方法控制反应进程.研究发现,通过对进料浓度、反应温度、体系碱值的合理控制,能够较好地完成对硝基甲苯邻磺酸到4,4′-二硝基二苯乙烷-2,2′-二磺酸的转化.原料NTS的进料浓度对氧化反应有较大影响,进料浓度过高,副反应加剧,易导致对硝基甲苯邻磺酸直接氧化生成4-硝基苯甲醛-2磺酸和4-硝基苯甲酸-2磺酸的副产物,进料浓度为20%时,氧化反应效果最佳.与传统间歇生产工艺相比,采用四釜串联连续反应工艺,氧化废水降低了38.3%,液碱消耗降低了48.25%,设备产能提高79.5%,生产过程更为稳定.The oxidative condensation reaction of 4-nitrotoluene-2-sulfonic acid（NTS） was carried out by continuous stirred tank（CSTR）,which was linked by two stirred tank.The stepped control process was applied to this reaction.It showed that the conversion of NTS to 4,4′-dinitrobibenzyl-2,2′-disulfonic acid（DND）could be completed well by reasonably control of feed concentration,reaction temperature and basic concentration.The feed concentration has a great influence on the oxidative condensation reaction of NTS.The high feed concent-ration was easy to aggravate the generation of 4-nitrobenzaldehyde-2-sulfonic acid（NBS）and 4-nitro-2-sulfobenzoic acid（NSB）as by-products.The optimum feed concentration was 20%,at which the oxidation reaction was carried out smoothly.Compared with traditional batch process,the volume of wastewater and the consumption of basic liquid decreased by 38.3%,48.25% respectively,and the equipment capacity increased by 38.3%.The production process was more stable.

关 键 词：两釜串联反应器 半连续氧化工艺 对硝基甲苯邻磺酸 4 4′-二硝基二苯乙烷-2 2′-二磺酸 氧化缩合反应. 

分 类 号：TQ612.9[化学工程—精细化工]