Reference

Effect of electrode material on the electroreduction of naphthalene 1-nitro-3,6,8-trisulfonic acid

Effect of electrode material on the electroreduction of naphthalene 1-nitro-3,6,8-trisulfonic acid. Konarev, A. A.; Katunin, V. Kh.; Pomogaeva, L. S.; Avrutskaya, I. A.; Fioshin, M. Ya. (Moscow, USSR). Elektrokhimiya, 20(2), 204-7 (Russian) 1984. CODEN: ELKKAX.In this article, certain chemicals are used. Some of their cas registry numbers are 7440-22-4 and 12661-60-8 ISSN: 0424-8570. DOCUMENT TYPE: Journal CA Section: 72 (Electrochemistry) Section cross-reference(s): 25 In connection with the electrochem. redn. of 1-nitro-3,6,8-naphthalenetrisulfonic acid (I) [38267-31-1] for obtaining the corresponding 1-amino-3,6,8-naphthalenetrisulfonic acid (II) [117-42-0], electrolysis in concd. H2SO4 was studied. The corrosion resistance of cathode materials during cathodic polarization (c.d. 10~20 A/dm2) and without current was studied using different materials (steel EI-417, Ti, Pb, Al, graphite, Cu,Ni, EI-943, Sn,Ag, Pb + 1% Ag) and an anode of Pt of the same size. The corrosion rate of the electrode materials slows down with time. The greatest corrosion in a soln. of II was experienced by Al and Ti, and in I by Al. The steel EI-943 and Pb differ by their high corrosion resistance in solns. of I and II in the absence of cathodic polarization. The most appropriate cathode material for the electrosynthesis of II is Pb. .

1-Amino-3,6,8-naphthalenetrisulfonic acid

1-Amino-3,6,8-naphthalenetrisulfonic acid. Konarev, A. A.; Katunin, V. Kh.; Pomogaeva, L. S.; Avrutskaya, I. A.; Fioshin, M. Ya. (USSR ). U.S.S.R. SU 1074863 A1 23 Feb 1984 From: Otkrytiya, Izobret., Prom. Obraztsy, Tovarnye Znaki 1984, (7), 87. (Russian). (Union of Soviet Socialist Republics).Several substances with their cas registry numbers 38267-31-1 and 89926-49-8 may be metioned in this study. CODEN: URXXAF. CLASS: IC: C07C143-60; C25B003-04; C09B049-04. APPLICATION: SU 82-3509176 5 Nov 1982. DOCUMENT TYPE: Patent CA Section: 72 (Electrochemistry) 1-Amino-3,6,8-naphthalenebisulfonic acid [117-42-0] is prepd. by electrochem. redn. of 1-nitro-3,6,8-naphthalenetrisulfonic acid [38267-31-1] in a H2SO4 medium in a cell with cathodic and anodic compartment sepd. by a cation-exchanging membrane at 80-90° and 10-50 A/dm2 const. c.d. The efficiency of the process is increased by electrochem. redn. at a Pb-Sb alloy cathode with 8.7-13.3% Sb content. .