Topic
Sodium sulfide
About: Sodium sulfide is a research topic. Over the lifetime, 2851 publications have been published within this topic receiving 27733 citations. The topic is also known as: disodium sulfide.
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TL;DR: In this paper, a new intramolecular CT complex was synthesized via cyclization of 4,4′-(2,5-furandiyl)bis(1-bromo-2-butanone) with sodium sulfide followed by condensation with glyoxal to give 1,11-dioxo[3.3](2, 5)furano(2.5)thiophenophane, which contains anti and syn conformers in a ratio of ca. 20:1.
Abstract: The title compounds have been synthesized via a route involving cyclization of 4,4′-(2,5-furandiyl)bis(1-bromo-2-butanone) with sodium sulfide followed by condensation with glyoxal to give 1,11-dioxo[3.3](2,5)furano(2,5)thiophenophane, a new intramolecular CT complex. A solution of [3.3](2,5)thiophenophane contains anti and syn conformers in a ratio of ca. 20:1 as shown by a VT-NMR study.
8 citations
TL;DR: In this article, the treatment of 4-(2′-hydroxyaryl)-2-(N,N-dialkylamino)-1,3-dithiolium perchlorates (1a-g) with sodium sulfide nonahydrate in ethanol at room temperature affords the corresponding 1,3dithiole-2-thiones (2a−g).
8 citations
TL;DR: A global evaluation of the results suggests that the higher the Cu-thionein character of a MT peptide, the higher is its tendency to harbor nonproteic ligands when building divalent metal clusters, especially Cd-MT complexes.
Abstract: Recombinant (E. coll) synthesis of mammalian MT1 and MT4 domains as separate peptides in Zn(II) and Cd(II) enriched growth media has rendered metal complexes containing sulfide anions as additional ligands. The Cd preparations show higher sulfide content than the Zn preparations. Also, the βMT1 and βMT4 fragments exhibit higher sulfide/peptide ratios than the respective α fragments. Titration of Zn3-βMT1 with Cd(II) followed by addition of several sodium sulfide equivalents shows that the Cd(II)-βMT1 species can incorporate sulfide ligands in vitro, with a concomitant evolution of their UV-vis and CD fingerprints to those characteristic of the Cd-S2- chromophores. Current results have also provided full understanding of previous data collected by this group in the characterization of the Cd-βMT1 preparations obtained from large-scale fermentor synthesis by allowing identification of at least 2S2- ligands per Cd-βMT1 species. Furthermore, the results here presented have revealed that synthesis of βMT4 in C...
8 citations
Patent•
01 Jun 2011
TL;DR: In this paper, a method for treating waste hydrochloric acid containing lead, zinc and ferrum was proposed, where the pH value of the further filtered filtrate between 0.5 and 4.5 was adjusted.
Abstract: The invention discloses a method for treating waste hydrochloric acid containing lead, zinc and ferrum. The method comprises the following steps of: adjusting the pH value of the waste hydrochloric acid containing lead, zinc and ferrum to make the pH value of the further filtered filtrate between 0.5 and 4.5; adding the filtrate into sodium sulfide solution, fully stirring and reacting; and filtering; the filtrate is the treated hydrochloric acid, and the main component of the treated hydrochloric acid is ferrous chloride; the filter residue is a mixture of lead sulfide, zinc sulfide and ferrous sulfide. By the method, the separation of lead, zinc and ferrum can be realized effectively.
8 citations
Patent•
31 Mar 2009
TL;DR: In this paper, a pollution-free production technology of direct fast black G, comprising the following implementation steps: first, primary acid coupling is carried out on nitroaniline after diazotization and H-acid; after the full reaction of the H acid is detected, sodium carbonate is added and pH is adjusted to 8 to 8.2 to carry out secondary basic coupling; the coupling product is added into a sodium sulfide solution for reduction, and the temperature gradually raises to t of 38 DEGC to 40 DEG C in the reaction process.
Abstract: The invention relates to a pollution-free production technology of direct fast black G, comprising the following implementation steps: firstly, primary acid coupling is carried out on nitroaniline after diazotization and H-acid; after the full reaction of the H-acid is detected, sodium carbonate is added and pH is adjusted to 8 to 8.2 to carry out secondary basic coupling; the coupling product is added into a sodium sulfide solution for reduction, and the temperature gradually raises to t of 38 DEG C to 40 DEG C in the reaction process; after the sodium carbonate is added into the reduction product after acidification to adjust the pH of a medium to 7.5 to 8, the mixture is adsorbed by activated carbon and filtered, and ternary coupling is carried out on the obtained filter liquor after diazotization and lentine; and after the reaction is detected to be end point, the materials are directly delivered to a drying tower for spray drying. In the invention, the reduced reaction solution does not need the processes of salting out, acidification and filtration, activated carbon adsorption is adopted instead. In the process, no waste liquor is generated, and environment pollution caused in the production process of dye is greatly reduced. Simultaneously, wastewater processing is not needed, and the cost is saved. The optimized technology directly transfers the reaction solution after ternary coupling into the drying tower for spray drying; and the yield and the coloring intensity of the dye are effectively increased, energy is saved, the consumption is reduced, and the effect is obvious.
8 citations