A novel method for the recovery of 4,4′-dinitrostilbene-2,2′disulfonic acid from the wastewater obtained from 4,4′-diaminostilbene-2,2′-disulfonic acid production
作者： Wenchao Peng , Xiaobin Fan , Shulan Wang , Guoliang Zhang , Fengbao Zhang
DOI: 10.1016/J.DYEPIG.2009.09.005
关键词:
摘要: Abstract HPLC and electrospray ionization tandem mass spectrometry were used to show that ∼30% of the DNS present in wastewater was reduced 4-amino-4′-nitrostilbene-2,2′-disulfonic acid 4,4′-diaminostilbene-2,2′-disulfonic during multiple-effect evaporation. A novel recovery method, which combines acidification subsequent reduction, recovered ∼90% is lost evaporation and, thereby, increased yield by 5%. In addition, many organic compounds removed.
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