Synthesis of Some Substituted Formazans and Bis Formazans

Novel 1-(p-aniinophenyl)-3-(p-substituted -phenyl)-5-phenylforrnazan compounds (2a-f) and 1,1'-(1,1'-biphenyl]-4-4'-yl)bis(3-(p- substituted pheny1)-5-plienylformazan compounds (3a-f) were synthesized by diazo coupling reactions of the prepared hydrazOnes (1a-f) With diazoniuni salts of phenylenediattine and benzidine, respectively. Novel mono=formazans were obtained with high yields under mild reaction conditions and were crystallized from methanol. Bis-forniazans Were purified by flash column chromatograph over silica gel. The strtictures of formazans and bis-fottimzans were confirmed by elemental analysis; HR MS and their spectral behaviours were investigated using H-1 NMRs; C-13 NMR, FT-IR techniques. The absorption characteristicsof the compotinds were examined by UV-visible spectra.WoSScopu

Investigation of reduction of magnetite based carbon composite pellets under semi-fusion conditions

In this study, carbon composite pellets were exposed to a reduction test under low temperature and semi-fusion conditions in which iron was melted without a solid form of slag deteriorated. The purpose of the reduction experiments under the semi-fusion condition was to produce an iron nugget which had physical and chemical properties similar to blast furnace pig iron at lower temperatures. These nuggets were produced from pellets that were made from a mixture of iron oxide, coke, flux, and a binder. These nuggets heated in a furnace with a chamber temperature of 1330 °C. The produced dried carbon composite pellets were melted and carbureted in a single-stage process. In this study, three distinct products were produced as a function of furnace residence time at fixed furnace temperature (1330 °C). These products were direct reduced iron (DRI), transition direct reduced iron (TDRI), and iron nuggets produced at residence times 8-24, 32-40 min, and 48 min, respectively. The iron nugget produced had a high apparent density (6.903 g/cm3), high micro hardness values (328 HV), high iron content (92.7% Fe), and was similar to blast furnace pig iron