活性艳蓝KN-R是一种较新的染料,色彩鲜艳、着色均匀,深受印染界青睐。它为深蓝色粉末,在水中溶解后呈蓝色溶液。活性艳蓝KN-R是由溴氨酸与间-β-硫酸酯乙基砜苯胺缩合再精制而成,主要用于棉布和麻、粘胶纺织品的染色及印花。
特点活性染料具有色泽鲜艳、应用性能优异、使用方便以及适用性广等显著特点。
制备在装有温度计、搅拌器、回流冷凝器的125毫升四口瓶中加入7.70克(0.025摩尔)3,3′-二硝基二苯二硫,12.5毫升水,升温至102℃。开始滴加7.8克(25.00%体积百分浓度,即31.2毫升,0.1摩尔)硫化钠溶液,并在10分钟内加完。保持温度在100~106℃并在此温度下反应80分钟。用薄板层析检查,原料斑点消失,生成了间氨基苯硫酚钠。
降温至40℃后,慢慢加入4.5毫升36%浓盐酸,然后在5分钟内分三批加入4.5毫升氯乙醇(0.0675摩尔),保持温度稳定在40℃。半小时内升温至60℃并在此温度下反应半小时,取样用薄板层析检查,间氨基苯硫酚钠斑点消失,已达终点。
将反应液转移到分液漏斗中静止分层。分去下面水层,上面的油层用水洗两次(第二次洗涤时加数滴盐酸调pH至中性)。产品干燥后过滤得到橙黄色油状物(Ⅲ)8.20克,含量为88.11%,收率为85.5%。
化学性质活性艳蓝KN-R为深蓝色粉末,在水中溶解度 (20℃) 为 100g/L。其水溶液呈蓝色,加1mol/L氢氧化钠后色光不变;继加保险粉并温热转红棕色,并有沉淀生成;再加过硼酸钠变为浅紫色。在浓硫酸中显酱红色,稀释后呈藏青色,并有沉淀;于浓硝酸中呈黄色,稀释后色泽不变。
用途活性艳蓝KN-R可用于棉、黏胶纤维染色,具有高亲和力、优良的匀染性和一般固色率。适用于各种染色方法。当用于浸染和轧染时,可与活性金黄M-R、活性红KN-5B组成三原色,拼染各种浅色;或与活性金黄M-G、活性红M-8B组成三原色,拼染各中等色泽。也可用于棉、黏胶纤维织物直接印花,如富纤布、黏胶丝织物的直接印花等,还适用于维纶纤维染色。
用途活性艳蓝KN-R可应用于棉、麻、粘胶等纤维的染色和印花。
生产方法以溴氨酸与间(2-羟乙基砜基)苯胺为原料。首先将间(2-羟乙基砜基)苯胺与溴氨酸缩合,然后在浓硫酸中进行酯化反应,经过盐析、过滤、干燥后获得成品。新制备方法是先合成间位酯(即间(2-硫酸酯乙基砜基)苯胺),再直接与溴氨酸缩合。
反应工艺条件如下:
有毒物质
可燃性危险特性热分解排出有毒氮氧化物、硫氧化物和氧化钠烟雾。
储运特性库房通风低温干燥保存。
灭火剂水、泡沫、沙土、二氧化碳或干粉。
The photocatalytic decolorization and degradation of an anthraquinone-based reactive dye, C.I. Reactive Blue 19, was carried out in laboratory-scale experiments with the systematic variation of several operational parameters, including electron acceptor (hydrogen peroxide) concentration, initial pH, use of buffer solution, aeration, and the specific chemical nature of the buffer solution. Photodegradation was performed under simulated natural light, and conditions were chosen to mimic those found in industry. Mineralization and decolorization were monitored by UV-vis spectroscopy and total organic carbon analysis, and kinetics were modelled using an in-series first-order combination mechanism. Reaction products were examined and monitored by high-resolution mass spectrometry. Under the conditions explored, the reaction rate was found to depend not only on pH and electron acceptor concentration, but also on the specific chemical nature of the buffer used.