WANG Jue~1,QIN Zhi-zhong~2,ZHANG Guo-liang~1,ZHANG Feng-bao~1(1.School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;2.Hebei Huage Chem-Group,Dongguang 061600,Hebei Province,China)
(1.School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;2.Hebei Huage Chem-Group,Dongguang 061600,Hebei Province,China
Abstract 4,4′-diaminostilbene-2,2′-disulfonic acid(DSD acid) was prepared via reduction of 4,4′-dinitrostilbene-2,2′-disulfonic acid(DNS) with liquid-phase catalytic hydrogenation method using Raney nickel as catalyst in water medium.The optimum technical conditions determined by a series of experiments were as follows:the concentration of DNS is 150—175 g/L,the amount of the catalyst used preferably 4% by weight based on DNS,temperature is 45—50 ℃,hydrogen pressure is 0.8 MPa.Under these optimum technical conditions,the purity of the product comes up to 98.4%.
WANG Jue~1,QIN Zhi-zhong~2,ZHANG Guo-liang~1,ZHANG Feng-bao~1.Reduction of DNS to DSD Acid by Hydrogenation[J] Chemcial Industry and Engineering, 2008,V25(4): 298-301
2008, Vol. 25 
